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i jsut buy a new game, and it crash in the middle of the play so.. i start a extreme benchmark to test the stability of the system (and what can be more heavy than a "Prime" and "heaven" together) well... my machine "pass" the test (yey ^_^) but the probblem are still there wen i play (and i cannot blame the machine anymore) it just so happens that the "only" games that this happens to them, are the Nvidia games so... who i blame... Nvidia ?... the Drivers ? (i have the 13.6)... the moon ? :lol:

Not sure that this belongs here, maybe it should be in software. Move if necessary. I recently heard from a friend (who is usually quite reliable) that Prime95 is not appropriate for stress testing AMD FX Bulldozer CPUs. I'm fairly sure that Prime95 is good for testing AMD FX processors, but I would like a second opinion here. Also, would OCCT be a good alternative? Thanks in advance

Hi Guys, I'm wondering what my bottleneck is preventing a further OC. I've got an i5-750 w/ Asus P7P55D Pro, stock is 2.67Ghz.I have it set to 20x Multiplier with 185 BCLK, which produces 3.71Ghz. If I try to increase the BCLK more than 185, Prime95 Starts to fail almost immediately - UNLESS I start to increase the CPU voltage to something like 1.33V, then I can squeeze a few extra in the BCLK, maybe up to 195. Increasing the IMC Voltage or The Ram voltage does not allow for additional overclocking, and furthermore, both are set to their defaults, or just a hair above. (IMC 1.15, ram 1.6) I haven't ran prime95 or memtest for very long just yet. Trying to figure out what the limits are. I have a suspicion that my ram has always sucked (RMA'ed several times to get stick that would work in dual-channel mode). I've got 8gb of 2x2gb x2kits Corsair CMX4GX3M2A1600C9 However, intuitively I would assume that since increasing the VCore allows for more overclocking, and increasing the VMem does nothing, that the bottleneck is the CPU. This does not fit with my preconception that my ram sucks Thanks for any feedback Sidenote: I also tried to set my multiplier to 21x, which the POST reports as running 3.85Ghz, however in windows it still shows multiplier at 20x and 3.7Ghz. Dunno wtf is up with that.

Today I achieved something which I personally thought I'd never be able to manage. 5Ghz on an i5-2500K is something I've always wanted to try but have always been too scared to punch the vcore too, it's currently at 1.4V and I dare not try running Prime95 for longer than 5 minutes at a time but I'm just so proud aha! I know that's ridiculous, what have you guys managed on your little beauties? System Specs i5-2500K @5Ghz 8GB(2x4) Patriot Viper Memory (1866Mhz) Asrock Z77 E-ITX Mobo Corsair TX650W PSU Corsair Hydro H60V2 (With 1xBitfenix Spectre Pro) In a little bitfenix prodigy with all this at the moment, and a lot of fans, it is very loud! My question is though, is overclocking too easy today? I mean to be quite frank I don't know very much in regards to what most of it means, other than increase the multiplier increase the vCore and viola, I know there are limits of course and it's damaging but is it too easy for ams to do, and potentially endanger their rig & hardware???

Hi all, I decided to overclock my i5-4670K... I ran some stress tests and got various results, so I'm not sure whether it is safe to call it stable or not. Here is how I overclocked: CPU core clock: 4.4GHz 4.3GHz CPU core voltage: 1.25V (manual mode for stress testing) Decreased to 1.18V CPU cache: 4.2GHz 4.1GHz CPU cache voltage: 1.24V decreased to 1.16V RAM frequency: 1333MHz/ 1600MHz RAM voltage: Auto/ 1.5V I stress tested 2 hours of OCCT (with the 1333MHz and voltage set to Auto for the RAM) and passed (max. temperature was 86°C). I then ran Cinebench on all cores 5 times and passed with around 648cb each time (max temperature was 76°C), and finally I did 8 hours of Intel XTU CPU test, which I also passed (max temperature was 84°C). I then decided to change the RAM frequency to 1600MHz and the voltage to 1.5MHz. It passed 1h 15mins of Intel XTU Memory test (max temperature was 84°C). However it failed the Prime95 Blend test after roughly 1h 20mins. it got up to 99 degrees and I got a BSOD with a 124 code (not sure what that means). So I ran Aida64 (Stress CPU, Stress FPU, Stress Cache and Stress System Memory) for 9h 30mins and it passed with a max temperature of 84°C. New tests: Aida64 (22mins) max temperature of 79°. Also tried 10 passes (on Very High) on Intel Burn Test, max temperature was 93°. I did those two tests with these settings: Core 4.4GHz, Core Voltage 1.195, Cache 4.2GHz and Cache voltage 1.190V Constantly got BSOD 124 and 9c on 4.4GHz, didn't want to increase voltage any more (getting really hot) so I'm running stress tests with 4.3GHz and 1.18V atm, looks good in Prime95 Blend though, been running for over 1hour 30mins and hottest core was 89 degrees. I just finished a 8hour 35mins Aida64 test (all checked except for GPU and local discs) and I ran it without a problem, max temp was 78 degrees. This was at Core 4.3GHz 1.18V and cache 4.1GHz 1.16V. Cinebench (5 times) gave me consistently good results an the max temp was 73 degrees. I also did some editing and rendering (adobe Premiere) with Google Chrome and also Photoshop open - I got a max temp of 72 degrees, so I'm pretty happy with the results. Might do a Memtest, though,.to see if everything is good PS: The rest of my hardware is in my signature

Hey! The other day, I finally put together my new machine. And I decided that I would overclock my 4770k just for now. So I tried to do 4.6 GHz and I turned up the voltage to 1.250. I logged in to my machine and started up Prime95. I do the standard torture test, and RealTemp is showing me that at max load on my CPU is at max 56 C which is pretty good. It keeps running for a couple of minutes, then the whole thing just blue screens. My first thought was that the CPU wasn't getting enough power, but then again this is Haswell, so power shouldn't be that much of a problem. So I bumped up the voltage to 1.300 just for testing. And this still happened. Got me another blue screen. I tried to turn the CPU Ratio thing close to my overclock (46), but when I ran Prime95 the whole computer would freeze after a couple of minutes. I have set my voltage to manual mode, so it won't change during testing. Not sure what I am doing wrong here. Can anyone help? Specs: i7 4770k 2x EVGA SC ACX 780's Asus Maximus VI Extreme AX 1200i Corsair Platinum 16 1866 MHz H110 900 D

I've been having some issues with a recent build for a friend and was wondering if the CPU may be faulty, or if all of these problems are because of the motherboard. Here is a current list of problems: 1) CPU only reaches 95% with prime95 running. The CPU as reported by task manager never reaches more than 94-95% total usage(including prime, windows services, etc) regardless of which test I run(Small FFT, Large, Blend, custom with 90% RAM). CoreTemp reports 100% across all cores though. Aida64 will stress the CPU 100% in task manager. Is this even an issue? 2) CPU throttles when approaching 40-45 degrees. The CPU is usually running 30-38 at load, depending on time of day(currently 27C outside, warmer in my room. running at 39C) with Swiftech H320. For some reason the temperature will sometimes jump to high 40s and the CPU will start to severely throttle(x7 multi). I suspect it is a VRM issue(this revision of the motherboard is known to have issues with this chip) 3) HWMonitor has reported minimum CPU temperature under load as 0 degrees. I suspect this happens partially because of the throttling, and partially because of AMDs temperature formula. 4)Not sure if this is problematic, but under 100% load the CPU is about 60 watts maximum according to HWMonitor. This CPU has 125W TDP so I was expecting more. System specs: -Windows 8 Pro 64 bit -XFX 850W Pro PSU -Gigabyte 990fxa-ud3 rev. 3 motherboard <- I suspect this is what is causing most if not all of the issues. Rev. 3 of this board is garbage and is currently pending RMA due to known throttling and VRM issues. -16GB Corsair Dominator 1600mhz(2x8gb) -Samsung 840 250GB SSD -PowerColor AX7970 -AMD FX-8350 CPU -Swiftech H320 Cooler -ASUS PCE-N53 Wireless card There is no BIOS update available for the motherboard. Rev. 3 is known to be complete garbage and we are currently waiting on an RMA number for this.

A few weeks ago arrived my H110 and was again very enthusiastic about overclocking. I managed to get 4.5GHz out of my 3930K (1.36V) and max temps were 85C. I usually stress test the processor with Prime95, but recently I decided to try some of the other software - OCCT an Aida64. I found a lot disturbing things. I used Real Temp GT to check the temperature. When I use Prime 95 to check stability - loop of 24H stable max temps are 85C (CPU usage - 100%) When I use Aida64 to check stability - loop of 12H stable max temps are 74C (CPU usage - 100%) When I use OCCT to check stability - Core 3 stops working in less than 5 min, regardless if I use the Lynpack mode or not... Can someone explain to me what the hell is happening here? A long time ago I remember someone on another forum saying that for Intel processors one should only use Aida64 to test stability, but I wasn't really sold about that until now. PS: All system specs in signature.

Greetings LTT forums yet again. Today I wanted to test my pc stability, using prime95.(Note every component is running stock clocks/ factory OC.) My pc specs: Board: MSI Z77A-GD65 Bios: Version A.80 VGA: MSI N660Ti PE 2GD5/OC X2 PSU: Corsair AX860i Intel Core i7 3770K Ivy Bridge 3.5GHz LGA 1155 MEM: Corsair Vengeance 4GB DDR3-1600 - CL9 1.5v XMP 2x4gb (Running at 1333Mhz) Storage: OCZ vector 256 gig SSD and 2x Seagate Barracuda 2000GB (64MB;7200) Soundcard: Asus Xonar Essence STX COOLER: Antec KÜHLER H₂O 620 CPU Cooler OC Gpu:Factory OC Cpu: Stock Memory: 1333 mhz OS: Windows 8 64 Bit professional I started running a custom blend test, like the one Linus did in his memory diagnostic video. (http://www.youtube.com/watch?v=NZhHlX6JMvg) Setting the memory usage to 7500 MB (I have a total of 8 gigs of memory). I had a lot of threads failing, even after running just for a short time, any suggestions? See the image below: Dukfruk

Hi, this isnt really a problem but i didn't know where to post it. I am soon going to build a computer for the first time and i was wondering if you had to stress test the cpu, gpu and memory etc? I haven't got any experience with programs such as memtest or prime95. Do i have to use those programs even though i am not doing any overclocking? And if it benefits my system which programs should i use and how long should i run them? I am thankful for every answer! I am sorry if there already was a topic like this, if there is please just link me to it

hey guys, i recently built a new system, and its been freezing and getting bsods randomly doing basic tasks such as web browsing. specs: fx6300 asrock 970 pro 3 r2 kingston hyper x blue 8gb kit (khx1600c9d3b1k2/8gx) gigabyte r9 270 sandisk ultra plus 256gb ssd (os), 2x 500gb hdd, 1x 320gb hdd, Antec Neo Eco 620C the system has not been overclocked in any ways. initially, i thought it might be windows update causing problems, so i reinstalled windows, but problem persisted. i ran prime 95 in place large fft thinking that it could be a temperature issue, but the cpu never exceeded 60C on the stock cooler. (currently cooled by a thermolab baram at 40C load) i then ran memtest which identified 2 errors during pass 3. this was when i realized that the ram wasn't running at kingstons advertised timings of 9-9-9-27, instead, it was running at 11-11-11-28. i manually adjusted the timing to 9-9-9-27-2t, and reran memtest. this time, i managed to pass 7 passes, at which point i exited memtest and booted into windows, only to find out that the system was having more frequent bsods and freezes. i ran prime 95 again, this time with blend test, which immediately resulted in errors. i reverted the uefi back to default settings (ram back to 11-11-11-28) and reran prime 95 blend, which again resulted in errors. ive tested both sticks have been tested individually and each of the slots are also tested with 7 passes of memtest, none of them resulted in any errors. do you guys think that its my memory causing instability (failing blend test) or would passing memtest rule out ram as an issue? could it be cpu or mobo? is it normal for the system to pass 7 passes of memtest but fail p95 blend test immediately? could the looser timing be an issue? and any idea why the motherboard doesnt run the memory at the advertised timings by default? any help will be greatly appreciated.

How long would you recommend running Prime95 for overclocking stress test? I know a lot of people recommend 24 hours, but I would really like to shorten that time. Right now I'm overclocking my i5-3570k (with CM Hyper 212 Evo Cooler) for the first time and I'm starting with 4 ghz. My goal is a stable 4.5 ghz if possible.

Hey guys! I just build my new gaming system which includes a 4770K and a Maximus VI Formula, and I have run about 40 h of Prime95 on it with the CPU OCed to 3700 MHz (I know it's not much), and it found errors (no warnings) on: Worker 4 after 2 h, Worker 3 after 9 h and worker 2 after 20 h. My H100i kept it at about 55-60 C. I did not increase any voltages, so it was on the standard Core V. of 1.05 V. What does this show? Does it show that my CPU has physical faults, or that it can't sustain the OC? Or do I just need to increase any of the voltages? Thanks in advance.

what is the best cpu stress testing program in your opinion? i personally like prime95 because its simple,it has different modes to choose from (small ffts, blend etc.) and if you are lucky you can find the next prime number and win a lot of money. It also it skyrockets my cpu temp like no other program.

I just discovered undervolting after looking around at ways to reduce the heat my CPU was getting to. I'm still on the stock cooler (saving up for an NH-U12p SE2 or similar) and running at stock clocks, but ever since summer really started I've been idling in the mid 40's and prime got to 64C on small FFT. I managed to get the voltage down a ton (AMD really gave the CPU's too high a Vcore, like 1.35+V is insane), and the lowest it would boot at is 1.1125V. That's as in barely boot and can't run Prime. I managed to get it to run Prime small FFT at 1.1250V and it was happy doing that. Left it running whilst on the forums and other stuff and it was happy. However, Large FFT caused it to instantly freeze and I had to hard reboot. This happened at 1.1375V and after about 5 minutes at 1.1500V (which is what I'm running currently). I haven't tried Blend yet, but I'm wondering if it's worth bumping up again (1.1625V and dealing with 46C rather than 1.1500V and 44-45C). I know undervolting shouldn't cause any permanent damage, and that Prime is a worst-case scenario since no real-world uses such as gaming or rendering are likely to stress the CPU in that way for a really long period of time, but I was just wondering what you guys think of these results. I was so close to 1.100V and now having to head a fair way back up (it'll have to go up when I get my new heatsink and give it a little OC, but I was really wanting those low temps whilst on stock - the PC turns my room into a furnace).

DISCLAIMER: If you're new to overclocking, go watch a tutorial video. If you want to use synthetic tests (Prime95, AIDA64, etc.), use manual voltage only (not adaptive). So I kept hearing over and over that you shouldn't use Prime95 on Haswell because there are crazy voltage jumps (or similar statements), but I never really saw the evidence for this. I decided to have a look for myself. I picked up a 4690K and an ASUS Maximus VII Gene, and did some voltage testing under load (with a digital multimeter reading off the voltage checkpoints), comparing the voltages seen with AIDA64 to Prime95 small FFTs and Blend tests. Setting a multiplier of 39, and testing voltages at 1.05, 1.10, 1.15,1.20, and 1.25V, there was no appreciable differences between the VCores of AIDA64, Prime95 small FFTs, and Prime95 Blend. The VCores differed by about +/- 0.002V, which is certainly nothing to write home about. When upping the multiplier to 42 and 44, there was no difference between AIDA64 and Prime95 Blend voltages, and Prime95 small FFTs resulted in a VCore boost of +0.005V. Again, this is nothing to write home about. There is a small voltage boost from using Prime95 small FFTs at higher (overclocking range) multipliers, but this is a one-step jump in VCore, which is not concerning. After validating an overclock (4.6 GHz with 1.29V Vcore), I tested this again, and found the same. There was no difference between AIDA64 and Prime95 Blend, and a +0.005V jump using Prime95 small FFTS. In terms of temperatures, AIDA64 and Prime95 Blend had similar maximums and averages (~71C max, 60C average), but Prime95 Small FFTs resulted in maximums of 85C, with an average of 75C. (These were taken using RealTemp, and the cooler was an H100 with two NF-F12s.) So to sum this all up: - You should be able to use Prime95 just fine on Devil's Canyon processors (Prime95 will NOT result in a significant voltage jump). - If you do use Prime95, use blend (not small FFTs, because you'll be looking at some pretty crazy temperatures) - If you are using synthetic stress tests: use MANUAL VOLTAGE ONLY (NOT ADAPTIVE) An additional note: Remember to set your Load-Line Calibration (read more here and here). For Haswell chips, LLC won't apply too much voltage to VCore, but it does affect the VIn (the voltage supplied to the CPU). With lower LLC settings, there was a pretty significant droop to VIn, and the read values were very unstable (varying by almost 10 mV over a couple seconds). These lower and much less stable voltages would probably destabilize an overclock quite easily, and I found that the auto LLC setting of my motherboard chose 2/9, which resulted in some pretty awesome VIn droops. With higher LLC settings, the VIn remained much more stable at the value actually set across the VCore voltage range tested. I ended up going with a LLC setting of 7/9 on this board (I might bump up to 8 for higher overclocks), but anyone overclocking Devil's Canyon (or Haswell), should test and set their own LLC settings for more stable overclocks.

sabertooth z97, i7-4790k, h100i cooler. with not OC running prime95 im at 60-62c usin the built in ez tunning it brings it to 4.6ghz but runs at 85-87c well running prime95, is this to high?

I just tried running Prime95 for 10 seconds and it got kinda scary. First of all, I'm concerned about my H60 cooler: http://linustechtips.com/main/topic/180541-bent-fins-very-concerned/ And I want to overclock. I tested it at stock speeds. Right when I pressed OK, my Corsair H60 fan went into jet mode and everything started to get all loud and Task Manager shows that my CPU is 100% utilized and RealTemp (10 seconds) shows max temps of 77C (who knew what it would be if I ran it any longer), so I exited the processes in Task Manager (it's still running when you exit the application, I knew 10 minutes ago before installing Prime95.) Basically, I want to know your experience with Prime95. Were you worried or had any thoughts about it?

Hello. I'm just getting into the PC gaming scene and I've just completed my first build. The computer runs fine and I haven't ran into any problems while using it. For example: I recorded about 2 hours of continuous BioShock Infinite gameplay at the highest quality settings for the video and maxed settings for the game using ShadowPlay. It did fine and kept at a stable 60fps. The problem is: I decided to do the Prime95 test and in a matter of seconds, the CPU temp skyrockets to 100+ C (in CPU-Z) and gives me the BSOD. Other than bringing the RAM to 1600MHZ, everything else stock and isn't overlocked in anyway. (Except stock overlock from manufacturer for video cards.) I'm not sure what it could be and any help in getting to the bottom of this is greatly appreciated. I probably spent a lot more than I should have on this build, so I don't want it to die suddenly. Part List: CPU: Core i7 4790k RAM: 16GB (2x8) Corsair Dominator Platinum 1600MHZ CL7 CPU Cooler: Corsair H100i (Replaced stock fans with Noctua) GPU: (2x) Asus 780 Ti DirectCU II OC Case: NZXT H440 (Replaced all stock fans with Noctua fans) Mobo: Asus Maximus VII Hero Edit: PSU: EVGA SuperNOVA 1000 P2

Hi, So my new gaming rig is about a month old now and it runs like a dream, almost. Now and then i get the blue screen that restarts the computer. There really isnt any reason for it, it just comes randomly, not under heavy load or anything. I can play Planetside 2 on max and nothing, but CSGO on medium and BAM bluescreen. It doesnt happen everyday. Earlier today i started to do several test to figure out what the issues was. I have run several RAM,GPU and CPU tests and no error or anything BUT everytime i try to run Prime 95 it goes bluescreen! every single time. When i run the torture test it does it immediately.. if i try the benchmark it goes bluescreen after a few minutes. Any idea what the problem could be? Pc Specs: i7-4770K ASUS GTX780 DCII MSI Z87-G45 1150 Crucial DDR3 BallistiX 16GB KIT (2 units)

Hi all, So I posted a couple of weeks ago in 'New Builds and Planning' about a new build, but I mentioned about what I believe may be hardware issues. I was recommended to start a new topic here for help. I have been getting quite a few BSOD (ID: 2057). It is when I start to push my system. Far Cry 3 commonly crashes my system with Assassin's Creed IV also doing it occasionally. Running prime95 and kombuster simultaneously can result in a BSOD but not always. I overclocked my CPU about a year ago from 2.8GHz to 3.2GHz (not ground breaking I know but it was my first overclock). Anyway it seemed stable. I had run prime95 for 24 hours no problem. Multiple IntelBurnTest no problem. I had played many games with it and no issue at all. It seemed to be running very stable. However last January my secondary HDD failed and Windows 8 wouldn't boot. It kept going into a repair boot loop (which seems to be a common issue). I just bought a new HDD and started from scratch, reinstalling and staying with Windows 7. At the same time I installed Hackingtosh as well and that was when I first started to suspect something. OS X was never stable. After running a few tests I found that my overclock was no longer stable even in windows and crashed....a lot. I thought it was very strange how my overclock went from being pretty stable for 6 months without a single crash to being very unstable. I'm at university and I had a lot of work and no time so I just returned my BIOS settings to default removing the overclock and it seemed to run fine for a while. Since easter however I found that it was crashing a lot and after running prime95 my computer always gets BSOD (always ID: 2057) or the following errors for both worker #5 & #6: "FATAL ERROR: Rounding was 0.5, expected less than 0.4" "Hardware failure detected, consult stress.txt file" "Worker Stopped" Sometimes this can occur 5 mins after starting or 5 hours. (I am unable to find any stress.txt file as well) I ran two Memtests with 0 errors (4 hours and 12 hours). Anyone have any thoughts as to what it may be? Or any other tests I can perform to help find the problem? Tests and results I have ran so far: Memtest86 - 4 hours (0 errors) - 12 hours (0 errors) Prime95 (blend test) 1. Immediate BSOD after clicking run (performed straight after a 12 hour Memtest) 2. 2hr 25min - no issues 3. 12hr test - @ 5hr 19min, worker #5 stopped - @ 5hr 42min, worker #6 stopped 4. workers #5&6 stopped working after 5 mins My current system is: Intel i7 930 (LGA 1366) Asus Rampage II Gene (X58) OCZ 6GB (3x2GB) 1600MHz DDR3 Intel 520 120GB SSD (OS Drive) Seagate 1TB (contains all my documents, games, etc.) OCZ 600W PSU semi-modular (which I will have to upgrade with I decide to crossfire) CoolIT ECO A.L.C. CPU Cooler (which is rubbish) Thermaltake Armor Revo Gaming Case (looking to buy a Corsair 350D to replace it) MSI HD 7970 Lighting Boosted Edition Thanks in advance for all your help and I hope the above made sense.

(if i am not mistaken, they are the blue numbers in the picture)