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AMD phenom II x4 955 Memory timing

  • AMD
  • Overclocking
Last response: in Overclocking
October 27, 2012 2:36:32 PM


This is my first post :) 

I'd like to overclock my desktop,
I have read many threads and guides, and I've tried various settings in the bios but I need to push my hardware to an optimal relationship between stability and performance,


Asrock 870 extrme 3
PC LC-Power LC6450 V2.2 Super Silent Series 450W
AMD phenom II x4 955 BE
RAM DDR3 1600MHz Corsair Vengeance CMZ8GX3M2A1600C9 8GB (2x4GB) CL9
Asus GeForce GTX 550 Ti Core 910MHz Memory GDDR5 4104MHz DC/DI/1GD5 1GB

I am using a linux distribution and i installed mprime,

More about : amd phenom 955 memory timing

a b K Overclocking
a b À AMD
October 28, 2012 1:37:01 AM

What issue are you running into when you use the OC guide?

October 28, 2012 6:18:30 PM


there are no problems but I'm not understanding if the cpu can actually work at those frequencies with all 4 cores,
this is my setting in the BIOS:

FSB 240 Mhz
CPU multiplier x16

There is the possibility to change the multiplier for each core

Voltage 1.4250
PCIe freq 100mhz
NB Freq 2400 MHz
NB voltage 1.2750
HT Bus speed Auto
HT bus width Cars
HT voltage 1200V
DRAM 1547 V
SB voltage 1.10V
VddA PCIe voltage 1.81 V
Memory timings Cas 6, RCD 6, TRP 6, RAS 15
Memory freq AUTO

the software shows me 4 cores at 3840 mhz when I disable the 'option "Cool and quiet", if I enable this shows me only one core to 3840mhz and the other 3 to 800 mhz even if I use mprime to stress the CPU,
Related resources
a b K Overclocking
October 28, 2012 7:20:36 PM

Drop the FSB back to 200 MHz, Set your RAM to XMP (Extended Memory Profile), Set the Multiplier to x20, start with a vcore of 1.475v...NB voltage should be between 1.2v and 1.25v...Leave SB alone whatever the default voltage is and the voltage goes the same for the RAM set it to factory voltage manually...You can play around with RAM timings after you get the CPU and NB tweaked right...BTW...Linux can be buggy on multi core applications...Look for the power settings and set it to max performance if Linux has such a feature
October 28, 2012 8:18:13 PM

Thank you! I had some doubts about the FSB, was threatening to burn the bus?
a b K Overclocking
October 28, 2012 8:20:13 PM

Yeah just stick to the Multiplier OCing when using the BE's it is just so much simpler and a helluva lot safer
October 28, 2012 8:40:04 PM

For SO debian based package I found hardinfo, he is pretty reliable and he shows the 4 cores separately, plus other characteristics of all hardware,

indicator-cpufreq instead allows you to change default CPU governor.

Now freq increase in all 4 core
a b K Overclocking
October 28, 2012 9:07:07 PM

Great glad to hear you got it resolved what was the hotfix please elaborate
November 7, 2012 12:41:45 PM

I have 2x4GB 1600MHz Corsair Vengeance modules, I looked in the bios, setting the memory clock is automatically set this manually can set the clock up to 800 MHz, because I can not set it up to 1600 Mhz?
a b K Overclocking
November 7, 2012 10:18:40 PM

What does CPU-Z say that the RAM speed is at?....If it is at 800 MHz then that is 1600 MHz as DDR3 RAM Modules are dual data rate
November 8, 2012 10:57:19 AM

I think I understand "transfer data on both the rising and falling edges of the clock signal"
a b K Overclocking
November 8, 2012 8:13:01 PM