Overclocking i5 4670k

[latham91]

Hey guys, been trying to overclock my CPU recently and i've managed to run stable @ 4.0 Ghz.

 

Would just like some advice really, on what I should do to increase my speeds further, do i just keep bumping up the multiplier?, computers been running for a few hours, idle temps attached in picture below.

[Luc401]

Stable as in running prime 95 for 24 hours strait? 

[nsyedhasan]

Idle temps don't matter much. What are the temps at full load and after 24 hours, is it stable?

[MegaDave91]

Stable doing what? Idling or actually stress testing?

[SparkySamZa]

Idle temps don't matter much. What are the temps at full load and after 24 hours, is it stable?

u could always do what i did use offset for the voltage and just up the multi but i think that's just x79

[heineygoat]

Dude you should be able to go way passed 4.0. Increase the multiplier and voltage.

[latham91]

Oh right, ive been using AIDA64 didn't realize you had to stress test for as long as 24 hours, I did a 4 or so hour test and ran fine without any crashes I guess il have to run a 24 hour test then. What do i need to be looking out for? just the temperatures or...

il post screenshots as soon as its done the 24 hour mark.

 

sorry im a bit of a novice when it comes to overclocking

[deathjester]

Easiest way? 

 

1) make sure you have an aftermarket cooling solution, cus Haswell runs hot.

 

2) If not and you are figuring out which cooling solution you want.  

 

Quick tests and this is not stress testing (do not stress test on the stock cooler AT ALL on Haswell, just see if you can boot to windows), this is just seeing what silicon lottery result you got. Set voltage to non adaptive (you don't want volts going past 1.25v for this test) at 1.25v and multiplier at 46 and cache at 3500 (cache is a huge pain in the butt and that is the last thing you should dial in). If it boots to windows you have a damn good chip. If not? Keep going down in clock till it does. If it doesn't boot at 4.4 at 1.25v? You lost the lottery and I would get dual rad h100i min if you want to push anything higher then like 4.3. If it booted at 4.5-4.6 then a evo is probably good enough. 

 

When you have cooling? First dial in clock with aida 64 cache, memory, fpu checked, asus realbench h.264 tests and stress tests. This will keep temps low while u check stability (you still need a aftermarket fan to do this).

 

Then you will most likely have to raise VCCIN for cache if you want to go past 3900-4000. Check just cache in aida 64 as it tests cache stability a lot faster. Cache doesn't mean much. This 1:1 nonsense is absolute BS. Ignore that. VCCIN adds heat. You want clock over cache. If too high a VCCIN gives you to much heat? Back off the cache OC. If you have dual rad water? Then sure. Set vccin to 1.9 and see what cache u can get.

 

If you try to oc both cache and clock at the same time? You are going to have a rough time with some chips and might just go crazy. When not testing just cache it can take hours and hours and hours to crash on unstable cache, while a game or render will crash within minutes.

 

Find your max clock with 3500 cache first. Memory? Not really an issue on Haswell till you hit 2400 and most chips have zero problem with that either. Memory should be last thing you touch, as a memtest over night can check stability on it, without you worrying about heat.

 

Also this hours of testing crap is dumb without dual rad water. Run aida 10 minutes on clock testing, If it passes that? Run real bench stress test for 10 min and then h264 for 10 minutes that simulated handbreak a few times or encode some videos. Passes all that? Play something like BF4 and load and close a few games (they will often crash on load close when you aren't stable). Put the computer to sleep and wake it a few times. No crashes? You are most likely stable. 

 

You can be stable in aida for half a day and crash in an encode or a game.  I would rather play a game and crash then look at a dumb test for hours on end that people like hardocp said ran perfectly yet crashed on a handbreak encode (which realbench simulates) or a game. 

 

People get way too carried away with this blah blah hours of testing. It took me a whole  hour to dial in my clocks at each voltage (small medium large based on ambient temps and if I am encoding or gaming). Cache took about the same with Aida (without aida it would be a pain in the butt). Memory oc? Prime blends a few minutes then mem tests over night.

 

Want to show me stability? Play BF4 for a hour without crashing (not including server crashes cus the game is a POS). Aida/prime means nothing. It is just a good quick test to see if you are near the right voltage and aida is great for cache and prime blend is good for memory. 

 

If you are stress testing with adaptive voltage and temps in the high 80's 90's? You are not making your chip happy. An encode is the most heat your chip is ever gonna see. I swear this 24 hour test crap started from Intel to make your chip last 2-3 years so you will buy new ones. Fits with their crappy thermal grease under the lid...

 

No one should be running stress tests for hours on end with air cooling on Haswell. Why degrade your chip for absolutely no reason? If you don't crash after 10 minutes you probably aren't crashing after a few hours. All you are doing is wasting time on ONE test that won't test as welll as trying a few different things. Try some games/encodes. Save yourself hours of looking at numbers go by. Leave the 24 hour primes/aidas for suckers.

[latham91]

Thanks for such an in depth reply!, I didnt mention in the first post i had a EVO 212 cooler with arctic mx-4 compound

[deathjester]

Thanks for such an in depth reply!, I didnt mention in the first post i had a EVO 212 cooler with arctic mx-4 compound

 

Evo? You should be fine up to about 1.25 v (considered really safe voltage) with that cooler. Aida? 75 temps are probably ideal in aida but 80 is "ok". Renders would be closer to 70.  Asus real bench and a h.264 run will show you max temps you will probably ever see on that chip.

 

Some chips run hotter then others, and no two chips are alike. For a mild overclock you could try 1.150 and 4.3 4.4. You might need up to 1.25 for 4.3. All a silicon lottery. 

 

Personally I wouldn't run a chip past around 1.25v on an evo, but if all you do is game? That is prob ok. I wouldn't stress test at all close to 1.3 Volts though (1.3 and under is still considered safe by people, but temps are the problem at this voltage with air cooling). Gaming temps are gonna be lower then render temps.

 

Your chip is gonna hit a wall with temps and that is when you stop. When you need A LOT more voltage/temps to go 100 mhz more? You are done. 4.3 is stupidly fast in any game.  If that is what you get stuck on with air? That is fine. That is still like a 4.6-4.7 ghz ivy. If you get 4.6 on air and 1.25 v or around there? Well you won the chip lottery. I might add a extra fan to the evo at 1.25v but 4.6? Do some hip thrusts and celebrate. There are people with H100i's at 4.3 and 4.2.