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Haswell · Posted: Fri Aug 20, 2010 1:13 pm Post subject: Overclocking Help

So I've managed to push the processor to 3.85GHz on air with a ton of overvolting, stable voltage is now somewhere around 1.45-1.5. However this seems to be the limit of the processor. I've tried increasing the bus speed to 280 but I just can't get it to stabilize, even when I give it up to 1.52 volts. It shouldn't be the thermal limit since it doesn't go over 70c under load (ambient 29c). Did I reach the full potential of the chip, or can I go further?

Also, any tips on memory overclocking?

Saifallofjmr · Posted: Fri Aug 20, 2010 2:17 pm Post subject:

Up the gpu voltage, you can push it to at least 880.

hcavolsdsadgadsg · Posted: Fri Aug 20, 2010 5:01 pm Post subject:

loosen your memory timings a bit.

Saifallofjmr · try 7-7-7-20-27 for memory _________________

try 7-7-7-20-27 for memory

Haswell · Posted: Sun Aug 22, 2010 3:14 pm Post subject:

Alright, so with trial and error on the Vcore and the NB voltage I'm now able to get to 3.92GHz, though unstable while running Prime95 ~62c. I seem to be hitting my thermal limit due to the summer heat (shutdown around 66c), though I should probably hit 4GHz without much hassle in a few months.

Haven't really tried pushing the memory yet, but setting the timings Saifallofjmr suggested above seem to give me hardware errors in Prime95, even when underclocked. Would it be due the the memory itself being not flexible enough?

As a side note, I'm getting high pitched squeals from either the processor or the mobo after the first series of tests of blend in Prime95, increasing in pitch as each core passes and each completed test thereafter. During the squealing temperatures would increase nonstop from ~60c to the thermal limit (~65c-67c) until the thermal protection kicks in and shutdown or the load relieved. Should I be worried about the squealing?

Saifallofjmr · Posted: Mon Aug 23, 2010 8:26 am Post subject:

1. Don't get your processor above 55C as yeah, you just shouldn't. Shouldn't go above 49/52C.

2. What is your cpu-z memory tab/ (Screenshot).

3. That is due to a coil, as it is being hot and also using a lot of power, which you shouldn't have that happen. Also it is coming from the power supply or the motherboard?

Haswell · Posted: Mon Aug 23, 2010 11:12 am Post subject:

Turns out 3.85 isn't as stable as I thought it would be, so I bumped it back down to 3.8 (still stressing). I think 1.45v is still too much for this clock speed when compared to other overclocking results, but it's the only stable voltage I can get without overheating for now (ambient ~20c air conditioned). Would the need for voltage be from the CPU itself or just a power hungry MoBo?

RAM is at 1.603v, still too much for my liking TBH. Haven't tried increasing the clock speed yet but the timings seem to hold for now. Would the lack of stability be due to the CPU itself or the motherboard?

I'm fairly certain the squealing is coming from somewhere around the CPU socket (probably the MOSFETS), proof of a bad or defective motherboard? I'm using an Asrock 880G Extreme3.

Picture taken while running Prime95. Note the high temperatures even when the ambient temperature is low.

hcavolsdsadgadsg · Posted: Mon Aug 23, 2010 5:08 pm Post subject:

Your temps are fine for now but definitely worry when you get into the 60's. If you get this hot, you've probably found your (or a) problem.

I was going to say you can try bumping the northbridge voltage but you've apparently already done it. You can also try lowering your HT link a bit more. I haven't had an AMD processor in years but HT link was finicky when it came to overclocking and you didn't want it to get past the 2000 range or 2100 range or something around there. There is no performance difference despite it sounding important.

I'd see what other forums have to say like hardocp or techpowerup

Saifallofjmr · Posted: Mon Aug 23, 2010 11:53 pm Post subject:

Yeah it is as looking at the cpu picture, your voltage is 1.502. Way to much as the cpu is rated for at most 1.500 volts.

So yeah.

hcavolsdsadgadsg · Posted: Tue Aug 24, 2010 5:28 am Post subject:

it's perfectly fine, hardly way too much.

Haswell · Posted: Tue Aug 24, 2010 5:48 am Post subject:

Staying below 60c is going to be a hell of a feat in the summer, and I don't know how accurate the sensor is. Others tend to give it 2-3c of leeway though.

I bought myself a Corsair H50 to replace the heatsink, added an additional fan for a push/pull configuration on the rad. as well. Still aiming for stability on [email protected], bumped down the HT link and NB to [email protected].

An interesting note though is that the bus speed, HT link and NB freq. would fluctuate frequently, causing the overall clock speed to go from 3.92 to 3.95. HT link and NB floats around 1680-1693. Anything worth concerning?

Saifallofjmr · Posted: Tue Aug 24, 2010 2:38 pm Post subject:

http://www.overclock.net/amd-cpus/765157-phenom-ii-x6-1090t-safe-voltage.html

http://www.overclock.net/amd-cpus/732420-very-quick-1090t-max-voltage-temp.html

"1.55v is your max with temps less then 55c if you can..just like the old phenom II x4. =)

for your temp..its actually like maybe 36c on full load....not 24c. which is pretty damn good anyways. =)"

I am trying to tell you guys god damn it, Stay below 55C -_-.