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OC'ing 955 on M4A79T mobo help

post #1 of 3
Thread Starter 
Hi everyone, I'm new on this forum and I've had my pc for little over a year now roughly. It's my first pc that I've ever built and I've had trouble with my OC'ing since day 1..

I just can't seem to get my 955 stable at anything above 3.6ghz with a multiplier of 18.. I tried raising vcore to everything between 1.35-1.5v -

Anyway I'll give you a list of my hardware components, I hope some of you experienced guys can help me out a bit here.

Here we go:

Motherboard: Asus M4A79T Deluxe.
CPU: AMD Phenom II X4 955 Black Edition.
Memory: Corsair XMS3 DDR1600 (made for intel *blabla*) I run them at 1333 with 7-7-7-20.
GPU: Asus 4870 1GB DDR5, not that you have to know the GPU but I'm just gonna write it all down..
HDD's: 1x 80GB WD 7200RPM for windows. 1x 160GB WD 7200RPM
I'm using a Mugen2 Cpu cooler together with MX3 paste.

Max temperatures are around 51~53c with an ambient of around 21-23c rougly when I run prime95 or OCCT. The vcore is set to auto and it puts it at 1.46 ish at 3.6ghz, I know it's high for 3.6ghz..

System's obviously running on Windows 7 64bit.

So like you see my temps are just fine and I SHOULD be able to get it higher than 3.6.. I just have no knowledge about HT link tweaking or NB/SB frequencies.. Maybe I got a very bad chip? As I see it's normal to get a 955 to 3.8 without doing any fine tuning..

I know everything varies differently between motherboard brands and etc so ill be happy to get some help here.

Oh and btw my case is a CM Scout, and it's neatly cable managed, it's very clean inside and I added an extra dust filter to the side. So airflow should be decent.

Regards Kasper
Edited by Freedom - 1/1/11 at 6:18am
post #2 of 3
Do one thing, keep the multi at 17.5 and raise the clockspeed to 212 (+12 increase). Keep the Vcore at 1.325v and restart. This should get you around 3.7GHz. Now if the system is stable, go increase the clock and at the first sign of instability increase vcore one step.
Now, if the first attempt fails, do it again using 1.39 vcore instead of 1.325v.
Lets see what happens
    
CPUMotherboardGraphicsRAM
Phenom II X4 955BE ASUS M4A88TD-V-EVO/USB3 MSI GTX 560Ti TwinFROZR II OC Corsair XMS3 2x2GB 1600MHz C9 
Hard DriveOSMonitorPower
2x500GB Seagate Windows 7 Ultimate 32bit Samsung 20" B2030 Corsair TX650 V2 
Case
CM HAF932 (painted black) 
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CPUMotherboardGraphicsRAM
Phenom II X4 955BE ASUS M4A88TD-V-EVO/USB3 MSI GTX 560Ti TwinFROZR II OC Corsair XMS3 2x2GB 1600MHz C9 
Hard DriveOSMonitorPower
2x500GB Seagate Windows 7 Ultimate 32bit Samsung 20" B2030 Corsair TX650 V2 
Case
CM HAF932 (painted black) 
  hide details  
Reply
post #3 of 3
For HT-link and NorthBridge, keep HT allways as near as 2000 mhz as possible, and NB either same as HT or 2500 - 3000 mhz.
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(13 items)
 
  
CPUMotherboardGraphicsRAM
1055T@3445MHZ 1.2V/ SB Pentium G620@0.84v ASUS M4A79XTD EVO/ ASUS P8P67 Sapphire 6870/ Club 3D 5770 2x2gb Kingston DDR3 1333mhz @ 1467mhz 7-7-7-17 
Hard DriveOSPower
Samsung Spinpoint F3 1TB Windows 7 Home 64bit Corsair 600W 
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..
(13 items)
 
  
CPUMotherboardGraphicsRAM
1055T@3445MHZ 1.2V/ SB Pentium G620@0.84v ASUS M4A79XTD EVO/ ASUS P8P67 Sapphire 6870/ Club 3D 5770 2x2gb Kingston DDR3 1333mhz @ 1467mhz 7-7-7-17 
Hard DriveOSPower
Samsung Spinpoint F3 1TB Windows 7 Home 64bit Corsair 600W 
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