ChrisBox

Yeah I pretty much brushed aside the ASUS guys claim that it was a power supply issue the second he said the CPU is drawing 300W when overclocked. I took your advice and investigated RAM further, I think you're right. The system boots fine at 2933MHz! I tried 1.4V (advertised 3000MHz @ 1.35V) on DRAM and adding 0.05V on System Agent and it still will not boot in 3000MHz unless I power cycle the power supply.

I built a new PC a few days ago and am now having issues powering it on. I have read the sticky at the top of this forum section and have checked/tried everything that doesn't involve ripping my PC apart. Going to do that if necessary when my next day off is. Hoping someone can provide insight before having to do all of that. Mobo: ASUS ROG STRIX Z270H Gaming (latest BIOS and drivers) CPU: Intel i5 7600K (4.8GHz @ 1.3V, cache ratio set to 4.5GHz) CPU Cooler: Corsair H100i v2 (with stock SP120L fans) RAM: 16GB Corsair Vengeance LPX DDR4 3000MHz GPU: ASUS STRIX 980 (1350MHz GPU clock, 1900MHz memory clock, +10mV, 125% power target) Power Supply: EVGA Supernova G2 650W Modular OS: Windows 10 Home 64 Bit (both nVidia and Windows power options set to Maximum Performance) So I built the system 3 days ago. Everything went smoothly. System powers up fine. I'm able to install Windows 10, update BIOS, drivers, etc. First thing I do is manually overclock to 4.8GHz, set the Vcore to 1.3V and cache ratio to 4.5GHz. PC takes it fine. I stress test with Realbench for 4 hours. Temps are all very good. Then I decide to play with RAM timings. I use XMP profile (thinking it only affected RAM), so that my RAM speed and timings would be proper. Then I lower the RAMs primary timings by one integer. Afterwards I run a few successful passes in Memtest86. I go to reboot the PC and it does not turn on. The only indications of power is the RGB strip that is built into the case lights up, and the fans on my graphics card start spinning. Case fans, radiator fans, and radiator pump do not activate. Nothing displayed on the screen, no errors, BIOS, splash screen, nothing. I panic. Try a few more times, same thing. I then flip the power supply off and back on again, and it starts up fine. I test this a few more times and get the same result (will not boot after shutdown unless I turn the power supply off and then back on again). Also I tested several times the fact that I cannot simply flip the power supply off and on again quickly, that won't work. I need to turn it off, wait 5-10 seconds until all lights on the motherboard turn off, then back to on. That's the only way it will work. So after turning the power supply off and on, then being able to boot into BIOS, I hit F5 and restore everything to defaults. After this the PC boots fine (tested multiple times). I assume that the XMP profile or adjusting the RAM timings must have caused some issue, so I decide to leave the RAM alone from now on. I reapply my manual CPU overclock, and manually set DRAM frequency to 3000MHz, being sure not to load any XMP profile and not to touch any RAM timings. PC boots fine now, multiple times. I run another 4 hour Realbench test and again everything looks good. I game on the PC for a few hours, run a bunch of benchmarks to compare to the ones I took before overclocking and to results from my previous PC. All good. Now I move on to overclocking my graphics card. Using MSI Afterburner I set my GPU clock to 1350MHz, memory clock to 1900MHz, add a 10mV offset to voltage, set the power target to 125% and keep the default auto fan speed. Run 2 hours each in Furmark and MSI Kombustor, along with a bunch of benchmarks. Stable, no glitches and temps are all fine. Over the next 24 hours I do a bunch more gaming, with numerous shut down and restarts in between (I'm that guy who turns his PC off if he isn't using it). No issues. Until a few hours ago... I go to turn the PC back on and again same as before it will not start, post, boot, give me a splash screen, or activate anything other than the built in RGB and graphics card fans. Fuck... Again, turning the power supply off, waiting for lights to go off on motherboard, and on again allows me to boot. I take off my GPU overclock, no change. On a whim I call ASUS motherboard support and talk to one of their guys. I explain my situation and he is convinced that my 650W power supply isn't sufficient for overclocking, even going so far as to say that overclocking my 7600K to 4.8GHz can cause my CPU to use up to 300W of power alone... not sure where he is getting that from. I am persistent in asking him to at least consider the motherboard being the issue while being careful not to be biased myself, being open to other possibilities. Nope, he's sticking to that. After some convincing he opens a ticket with "the engineering department" and I should hear from them at some point. And that's where I'm at. Even with all of the overclocks on, as long as I cycle the power supply I can boot just fine into Windows and run stress tests and game to my hearts content, but once I shut down I'm faced with the same issue until I cycle the power supply again. Sorry for the novel but I wanted to include as much detail as I could. Any ideas?

Hey there I've just started experiencing a problem with my OC and was hoping someone could help. 7600K (4.8GHz @ 1.3V, core ratio @ 4.5GHz) ASUS ROG STRIX Z270H I had my overclock dialed in and stable, great temps. Then loaded XMP profile for my RAM as to set the correct timings. Saved in the BIOS and rebooted, then I see that my CPU is set to 3.8GHz not 4.8GHz. Also in Task Manager my CPU speed jumps around from 1.0 to 2.0 GHz. Went back into BIOS and confirmed baseclock, multiplier, voltage and that it's showing target frequency at 4.8GHz. Back in Windows, same thing. http://imgur.com/a/oXcSo

ASUS ROG STRIX Z270H Corsair Vengeance LPX 3000MHz DDR4 Looking to play around with my RAM timings. Corsair advertises timings of 15-17-17-35. In ASUS ROG BIOS I can find values for the first, second and fourth timings (CAS Latency, RAS to CAS Delay and RAS ACT Time) but cannot find where the third number is. Searching online shows me that it should be the tRD value, but I only see that in the BIOS under Third Timings section, and there are a bunch of tRD value to be seen (tRDRD_SG, tRDRD_DG, tRDWR_SG, etc etc). Any idea what I'm missing? Photos of all of my DRAM Timings settings in the BIOS (sorry for quality): http://imgur.com/a/BJog6

Generally is plugging the rad fans along with case fans into CPU_FAN and CPU_OPT so that CPU temp controls all fans together a good idea?

Thanks guys. Will definitely take your advice. Still, would be cool to see how other people with the same case have theirs set up, for curiosity sake!

If you don't mind me asking, whats the rationality behind that? Wouldn't the top fan as exhaust be more beneficial, to help rid the case of the hot air the rad is dumping into it?

Thanks very much. Came across this nice looking build that does the opposite, but I imagine he can pull it off due to push/pull and all fans being used. https://cdn.pcpartpicker.com/static/forever/images/userbuild/192142.605738b60fd45fe134ad5864f088d705.1600.jpg

A single 120mm exhaust will be sufficient for 3 intake fans?

Hello everyone! I'm awaiting parts for my new build but am having some issues rationalizing the best case scenario with respect to cooling, and was hoping that somebody could provide some insight into this for me. The build: Phanteks P400S Tempered Glass Edition ASUS ROG STRIX Z270H Intel i5 7600K (plans to OC to 4.8Ghz @ 1.3V or lower if stable) Corsair H100i V2 (with stock SP120L fans) ASUS STRIX GTX 980 (plans to put a minor OC on the card) Will be using Corsair AF120 as case fans (have access to both performance and quiet editions) Background info: So with this case in particular it only supports radiator mounting in the front (with dust filters). The top of the case has room for 2x120mm or 2x140mm fans (both spots have separately removable covers and dust filters), as well as room for 1x120mm fan at the back of the case (no 140mm support there). The dilemma: I'm not sure if I should use the radiator as intake or exhaust, and how to configure the case fans based on that decision. If intake I should get better CPU temperatures but will dump that CPU heat inside of the case. I've heard mixed opinions on whether or not this would affect GPU temp much if at all, due to the GPU temps always being much higher than ambient case temp. Some people say otherwise and that GPU temps will suffer, so I'm not sure which is true. If radiator is exhausting out the front of the case CPU temps will be higher, and I feel like due to the design of the case there will be restricted airflow for air leaving the front of the case. But if the doomsdayers mentioned above are correct, this may help GPU temps. I think that I should use the front mounted radiator as intake, and don't believe that it will effect GPU temps much at all. If this is correct I am now faced with deciding how to exhaust air out of the case and maintain positive pressure. Would a single AF120 Performance Edition in the rear of the case be enough? Or, I could put use 2 AF120 Quiet Editions in it's place (one in the rear and the other using one of the top slots in the case, with the empty top slot blocked off). Additional: Also my plan is to run the H100i V2 pump off of the AIO header on the motherboard, and all fans (both radiator fans and whatever case fans I end up with) off of CPU_FAN and/or CPU_OPT. Is that a reasonable thing to do? I hope I was able to get my thoughts across clearly and that some people (hopefully someone else who is using this case with an AIO) can chime in with some advice. Thanks!