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Amd Phenom II 1055t x6. Overclock instability due to memory timings?

post #1 of 4
Thread Starter 
So, I have been trying to bump my successful 3.5 ghz overclock, to a nice solid 4ghz and call it good but I have been having some issues. Online I found I can bump my fsb to 288 and get 4032 out of an air overclock, and was able to do so for around ten minutes several times before BSOD showed. I assume it's thanks to my memory timings as the voltages for my OC seem to fit the bill but I am really unsure of where to start. Should I be bumping each timing individually? The bios has made it quite difficult to see if my RAM is even close to where it should be. Here are my specs along with screens of my successful OC.

Amd Phenom II 6x 1055t 2.8ghz cpu
Asus M4A785TD-EVO mother board
( reportedly supports 1800 speed ddr3 for an overclock?)

4gb DDR3 SDRAM 1600 for the ram
default timings are 9-9-9-24-2n

I hope you guys can help me get this overclock stable finally. My temps are great, I'm so close!


post #2 of 4
You may be able to if your components aren't weak. I had a 1045T stable over 4.2Ghz, but the one I'm using now barely wants to break 3.8...but it might be my MB.

You probably need more CPU-NB volts, or your memory is not set well. Change your CPU/NB Frequency from 10x to 7x. That will put the CPU-NB close to stock speed (288*7=2016) . If it runs stable at that speed then increase the multiplier to 8, 9 10, until it's not. I believe in your bios it's either the VDDNB or CPUVDDA voltage adjustment.

Also, it wouldn't hurt to see the CPUz Memory tab and SPD tab.

Oh yeah...reduce your HT Link Frequency. There is no benefit of raising it and it can add to instability. Lower that to a 7x multiplier and leave it there. (for 288 )
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post #3 of 4
Thread Starter 
Thanks, that's excellent information. In my bios though, ht link frequency and the like are listed in Mhz rather than a simple multiplier. Should I just set it for my targeted speed? In this case, you said 2016? Here is my memory tab.

Thanks again for the help.
Edited by skyrn - 11/22/13 at 5:10pm
post #4 of 4
Ok, then you have to assume that the HT link frequency follows the same pattern as the CPU-NB. As you can see on your CPUz tabs they are both
2500MHz (10x250)
Try it at 1400 if you're running your bus speed at 288. That should yield real results of 2016
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CPUMotherboardGraphicsRAM
Phenom II 1045T MSI 990FXA-GD80v2 XFX Radeon HD 6770 Samsung 
Hard DriveOptical DriveCoolingOS
Corsair Force3 LiteOn Xigmatek Gaia Win7 
MonitorPowerCase
Acer H233H Rosewill Hive 750 DIYpc Alpha GT3 
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CPUMotherboardGraphicsRAM
Phenom II 1045T MSI 990FXA-GD80v2 XFX Radeon HD 6770 Samsung 
Hard DriveOptical DriveCoolingOS
Corsair Force3 LiteOn Xigmatek Gaia Win7 
MonitorPowerCase
Acer H233H Rosewill Hive 750 DIYpc Alpha GT3 
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