Haswell cache overclock

teppic · 8 Sep 2013 at 22:08

I'm having trouble with getting my cache ratio up on my 4670K. The highest I can get is 42x or it crashes. The core is stable at 4.6GHz (1.31v), and the cache voltage is set to 1.115v. I've tried increasing that to 1.135v, but it hasn't helped. I've also tried increasing the core voltage to 1.35v without any change. Anything else I can try?

uksoldierboy · 9 Sep 2013 at 08:54

I have my cache @ x45 with my multi @46, that's with the cache volts @ 1.240.
Maybe try raising the volts bud on your cache?

teppic · 9 Sep 2013 at 15:52

I've tried that - up to 1.135 (I think the default is 1.050v). It seems weird that the core would go up to 46 but the cache no more than 42, I know that I'll be getting a little less performance because of this.

edit: just saw you put your cache voltage, not core voltage to 1.240v. That seems a bit high! I'll try 1.20v and see if that gets it to 43x.

teppic · 9 Sep 2013 at 21:33

Having some luck. I tried 1.2v and 43x it passed the Intel tuning stress test (only 5 mins). Before it was crashing within a few seconds. I'm now trying 44x at 1.2v.

edit: crashed after 2 mins at 44x.

edit2: passed the short test at 44x cache / 1.24v, but quickly failed 45x. 44x should be good enough to get rid of the bottleneck with 46x on the core though.

Jeps · 10 Sep 2013 at 10:51

I've read that increasing the eventual cpu input voltage can help stabilise the cache. Try setting it to 1.9 and see if it helps. I think its called VCCIN on some motherboards.

james_2k · 10 Sep 2013 at 11:11

i have to run 1.3 on the cache to get 45x. 1.2 for 44x

teppic · 10 Sep 2013 at 12:50

I'd read that you shouldn't put the cache above 1.135 or so, but that's obviously nonsense. 1.24v seems to be fully stable at 44x, I might try 1.3v for 45x but not sure I want it much higher as my vcore is already 1.35v for 47x (I raised it).

I'd put the input voltage up already - I think it's on 2.0v at the moment.