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Freezing in prime95, NB overclock.

post #1 of 16
Thread Starter 
Ok so at the moment my system is running at (2hours P95 stable, didnt test more because its not final):

CPU Clock: 240*15 = 3600 @ 1.35v
CPU NB: 240*10 = 2400 @1.2v
HT: 240*9 = 2160 @1.22v
RAM: 240*6.66 = 1599 @1.71v
Basically everything is the same what i want to get it just the north bridge isnt co-operating...

Currently stress testing:
FSB = 200
CPU Multi = 3600 (18) @ 1.35v
NB Multi = 2600 (13) @ 1.225v
HT = 2000 (10)
RAM = 1600 6-8-6-24-1T@ 1.69v

Current overclock i want to achieve...:
FSB = 250
CPU Multi = 3625 (14.5) @ 1.35v at the moment
NB Multi = 2750 (11) @ 1.225 at the moment
HT = 2000 (8)
RAM = 1666 6-8-6-24-1T @ 1.73v at the moment

It works but im having problems with prime95, i dont BSOD or shut down or anything, it works for a bit then i just get an error and it stops working first on one core, then eventually all 6.
I also got freezes then i pushed the NB voltage to 1.25 and havent gotten any yet.
Any tips for my overclock?

Thanks
Edited by Klinkey - 12/29/10 at 7:16pm
post #2 of 16
Thread Starter 
Also is Speedfan an accurate way of measuring CPU temps... im getting 26c idle (at max rpm, 3500 or so) with ambient of like 24
post #3 of 16
Quote:
Originally Posted by Klinkey View Post
Also is Speedfan an accurate way of measuring CPU temps... im getting 26c idle (at max rpm, 3500 or so) with ambient of like 24
For temps it is, idk about RPM it was a few RPM's off on my rig but I use Speedfan or HWMonitor from CPU-Z

http://www.cpuid.com/softwares/hwmonitor.html

and that is pretty accurate.
    
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CPUMotherboardGraphicsRAM
AMD Athlon 620 at 3458 MHz (x 4) MSI 870A-G54 GeForce 210.10 Custom PATRIOT 8GB and 4gb XMS both at 7-7-7-20-27 1T 
Hard DriveOptical DriveOSMonitor
Western Digital Caviar Black 640GB HP W7 U Dual Full HD 22/24" 
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600W Coolmax Modular Psu Apevia X-Jupiter JuniorG 
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post #4 of 16
I would definitly get a after market cooler before going any further. Colder it gets under load the easier/higher U can OC

Did U just bsod when running win 7 without prime?
And hows Ur temps?
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CPUMotherboardGraphicsRAM
Fast one! Asus Good one! Yeah got sum of that... 
Hard DriveCoolingOSMonitor
one of those 2,5 inch No good without it... Prolly the newest Check! 
KeyboardPowerCase
Seems like it... 1000W`ish Huge, but not happy about it 
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post #5 of 16
Thread Starter 
Quote:
Originally Posted by Maximous View Post
I would definitly get a after market cooler before going any further. Colder it gets under load the easier/higher U can OC

Did U just bsod when running win 7 without prime?
And hows Ur temps?
I ran a stress test yesterday at the ratings its at now and got cpu of max 46c or so.

Keep in mind im using AS5 and i lapped the heatsink, so its a bit better than it would be on stock, also im using the max rpm on the cpu cooler.
post #6 of 16
Thread Starter 
Just ran a P95 stress test on the following settings:

CPU Clock: 240*15 = 3600 @ 1.375v
CPU NB: 240*10 = 2400 @1.2v
HT: 240*9 = 2160 @1.22v
RAM: 240*6.66 = 1599 @1.71v

CPU temps went up to 52c, going to set the CPU clock down a bit (3500mhz) to lower temps, 52c is too risky seeing as offset is about 10 degrees.

Edit: Lowered core voltage to 1.35 and ram to 1.69, now im getting 51c max and usually 49-50 at load, is this still safe (offset on AMD apparently is aroudn 10C?

Edit2: I think i have myself a stable overclock .
Now all i need to know is whether i should OC the NB further (does anyone know if that would increase cpu temps aswell?) and see if i can get the RAM to run better...
Edited by Klinkey - 12/29/10 at 3:53am
post #7 of 16
Try to keep HT around 2000 (1900-2100 is also fine); upping the HT can actually decrease benchmark scores and detract from stability. 52C is safe if it was actually 52, however if 52 is the "Core" temperature and not the "CPU" temperature you are probably running at around 64 degrees offset, which actually turns out to be past the limit of about 62; the offset is about 10-12 degrees, I have mine set to 12 in CoreTemp. Apparently upping the voltage on Phenom II's can result in big temperature increases. OC-ing the NB contributes to CPU temperatures because the NB/IMC is integrated onto the CPU.
post #8 of 16
Thread Starter 
Ok thanks
post #9 of 16
Thread Starter 
Prime95 stopped running (stopped stressing cores) then froze with this setup:

CPU Clock = 14.5*250 = 3625 @1.35v (stock 1.3)
CPU NB = 11*250 = 2750 @1.275v (stock 1.15)
HT = 250*8=2000 @1.2v
RAM = 250*6.66 = 1666, 6-8-6-20-2T @1.73v

Still unable to manage running Prime95 for more than 5-10 minutes any ideas?
Edited by Klinkey - 12/29/10 at 7:03pm
post #10 of 16
Thread Starter 
Still need help on this if you can :/
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