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A couple of Phenom II questions.

post #1 of 6
Thread Starter 
Hi everyone, I've got a couple of questions about the Phenom II that I've been wondering about for awhile.....

1) Stock CPU-NB voltage? What exactly is it?
2) Best way to check if CPU-NB is stable after OCing it?
3) At what point does RAM speed become useless/not as important for the Phenom II? IE: 1333, 1600, 1866, 2000 etc. Or is this dependant on CPU-NB? Would lower latencies benefit it more than actual RAM speed?
post #2 of 6
1.Voltage for L3 cache and the memory controller
2.K10Stats may be helpful
3.Dependent on the CPU-NB speed (higher L3/IMC speed the better it can access fast RAM), but as a thumb rule I haven't seen any much of a performance boost over 1600 in any benchmark. In practice there's hardly any noticeable performance boost over 1333. Lowering latencies seems to help always a small bit while increasing speed over 1333 doesn't bring much either. In practice I'd prefer lower latencies as they can be achieves at lower voltage and lower strain towards the CPU-NB.
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Centurion
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post #3 of 6
Thread Starter 
Quote:
Originally Posted by dragosmp View Post
1.Voltage for L3 cache and the memory controller
2.K10Stats may be helpful
3.Dependent on the CPU-NB speed (higher L3/IMC speed the better it can access fast RAM), but as a thumb rule I haven't seen any much of a performance boost over 1600 in any benchmark. In practice there's hardly any noticeable performance boost over 1333. Lowering latencies seems to help always a small bit while increasing speed over 1333 doesn't bring much either. In practice I'd prefer lower latencies as they can be achieves at lower voltage and lower strain towards the CPU-NB.
About question 1, I meant the actual value. IE: 1.15, 1.2, etc.
post #4 of 6
1: 1.2V
2: Not sure about this, but I personally have found that the standard OCCT test will fail an unstable CPU-NB very quickly.
3: 1600-1800 is the sweet spot in the gaming tests I've read. Over 1800 looks good on synthetic tests but yielded lower performance in games.

PS: In my own gaming testing, the gains from overclocking the CPU/NB aren't anything spectacular. Single digits of FPS, but if every frame counts.....
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post #5 of 6
Thread Starter 
Ok guys, thanks for the information!
post #6 of 6
If you leave the L3/IMC speed at the nominal value you shouldn't up this voltage more than one notch, and that only if nothing else works to stabilize the CPU. If you increase CPU-NB speed with the multiplier or by upping the base clock than you may have to raise the voltage too. Be careful though as CPU-NB overvolting seems to massively increase heat output and the performance benefits aren't that obvious.
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Phenom II 940 @3.3GHz 1.25V Gigabyte 790X-DS4 XFX 5850 8GB OCZ DDR2-800 
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PowerCase
400W Silverstone Strider Antec P182 
  hide details  
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Centurion
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CPUMotherboardGraphicsRAM
Phenom II 940 @3.3GHz 1.25V Gigabyte 790X-DS4 XFX 5850 8GB OCZ DDR2-800 
Hard DriveCoolingOSMonitor
Corsair Force 3 TRUE Win 7 Pro x64 ACER 23" TN  
PowerCase
400W Silverstone Strider Antec P182 
  hide details  
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