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[OFFICIAL] AMD Athlon II X4 Club - Page 80

post #791 of 1595
What kind of performance gains do you guys see by raising the NB clock for this CPU?
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AMD Phenom II 975 BE Asus M4A78T-E Asus HD6850 Samsung  
Hard DriveHard DriveCoolingCooling
Samsung 830 Samsung F3 CM 212+ Ultra Carbon VGA Cooler 
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post #792 of 1595
Hi o_o

http://valid.canardpc.com/show_oc.php?id=1073607
post #793 of 1595
post #794 of 1595
Quote:
Originally Posted by thor17 View Post
Wow that is quite the over clock. I can set over clocking profiles and I have a FSB of 250 which I like at a first shooting point because I can change the HT multiplier, RAM multiplier, and NB multiplier so they go back to stock speeds. I would like to do the same and shoot for 300 down the road.
Edited by scaz - 3/16/10 at 6:38am
post #795 of 1595
Hi,

I have finally got all my components together and have already started on OC'in my 620.

I have hit a couple of issues and thought you guys might be able to help.

I have done some mild over-clocking to 3250mhz, when I run a stability test in Everest its fine, but in PRIME95 on either Small FFTs or Large FFTs test I get a reboot after a few seconds or minutes. To get stable I need to up the voltage and its fine, but why is everything OK in everest ? at a lower voltage ?
post #796 of 1595
Quote:
Originally Posted by oc_united View Post
Hi,

I have finally got all my components together and have already started on OC'in my 620.

I have hit a couple of issues and thought you guys might be able to help.

I have done some mild over-clocking to 3250mhz, when I run a stability test in Everest its fine, but in PRIME95 on either Small FFTs or Large FFTs test I get a reboot after a few seconds or minutes. To get stable I need to up the voltage and its fine, but why is everything OK in everest ? at a lower voltage ?
I am not an expert, but I believe the Prime 95 really pushes your ram. I would check your ram speeds and timing. It's is usally recommened that you try to keep ram at or below stock while your over clocking you processor.
post #797 of 1595
Blend tests the ram the most. My guess is it has to do with the method of burning the CPU. Stability is relative, I had my rig OCd the same for five months without issue and decided to run Prime95 Large FFTs the other day and it failed after two minutes. I never had an issue under normal operating conditions. Do you care about bragging rights or usability, because that's what it really comes down to.
post #798 of 1595
Thanks, I don't think its problem with my RAM as its DDR3 1600MHZ and its currently running at 1333MHZ, am not sensative to bragging rights, but I do want a stable system which is likely to run as cool as possible and also last me as many years as I can get out of it, and I guess the higher the volts to the CPU the more it could it out of the CPU over time ?

Apologies but am a novice, times have changed so much since I last OC'd my 166MMX lol
post #799 of 1595
What voltage are you running to the CPU now? You should be able to hit 3250 on 1.3 - 1.325 volts. Set the NB to 2500 @ ~1.2v and HT link to 2000. Make sure your ram is at the right voltage, and if you're underclocking your memory you can try to tighten the timing a bit.
post #800 of 1595
at the moment, am running stock 2.6ghz at 1.15v, I have been passed 3.25 at around 1.325 (I think), but to get stable at 3.5/3.6 I think (from memory) I needed 1.55v to get stable on PRIME95. I didn't need to raise NB voltage as I reduced multi to 8 i think (is that not so good ?)

I've not decided what to settle for at the moment, but would love to find a way of getting stable at 3.4/3.5 with as least voltage increase as possible.

For cooling i've got coolmaster 212+ so that should be OK (fingers crossed)
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