overclocking CPU Haswell

aoluffy · 3 Dec 2014 at 02:36

I've been messing around trying to overclock my cpu for dolphin emulation.

i have a 4670k and a z87 asus mobo on a silver arrow cooler.

i tried running it at 1.2V and 4.6ghz, crash straight away, didn't boot windows.

then i messed around a bit, got a stable 4.0ghz on 1.2V with prime95 running.

I then went up a notch, 4.2ghz and prime95 crashed. however i've noticed on every other stress test program, my computer is fine and temps stay within 70 degrees whilst prime 95 makes them soar to 80+.

is prime95 a good way to tell?

i'm on 4.2ghz 1.22V at the moment. aida and intell burn test are fine but prime95 on small FTT BSODs.

McGraw · 3 Dec 2014 at 09:06

Prime is known to make haswell very hot.

I just use AIDA for twenty minutes and then run my pc as normal and only worry about blue screens if I get them in normal use.

Not had a bsod despite running FSX and Premiere Pro at length.

foster grant · 3 Dec 2014 at 09:09

The common denominator being!!

On Holiday · 3 Dec 2014 at 09:12

If it runs what I want it to run then that's stable enough for me.

I will put the CPU through the paces with wPrime 1024M though to check for any quick crashes or temp issues.

Wouldn't worry about it crashing in Prime95 providing everything else is okay and it runs as it should.

aoluffy · 3 Dec 2014 at 12:56

Thanks guys.

Well I've decided to go for a 1.23 volts @ 4.2ghz with a 40x cache. I wanted to go higher but it keeps crashing on Intel Burn testing (within minutes it will freeze??).

Is that a cache problem? i.e. shall I manually set the voltage for the cache? I read freezes = cpu cache, so i decreased the cache from 42 to 40 and now it flys through IBT on high mode. My temps on IBT are running at around 77 degrees so I'm guessing I don't have much more headroom if I want to stay safe.

I think it can probably run at 4.3ghz @ 1.23 volts but I'm sure it won't pass the IBT on high mode (aka it will freeze). Any suggestions please?