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What is the next step in overclocking Phenom after adjusting mulitipli

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November 18, 2010 12:36:06 PM

Ok, so my Phenom II 555 is now running stable at 3.9Ghz after solely adjusting the multiplier at 19.5x. At this speed, my CPU temp maxed at 37C while running Prime95 for hours. (Note: I am using a Tuniq Tower for cooling and at 20x mulitplier, the computer crashed.)

So, what is my next step? Should I increase the FSB or just increase the cpu voltage? I want to separately adjust RAM speed later if possible. Keep in mind that my MSI 890FX-GD70 has several options for adjusting voltages, so please be as descriptive as possible. I need precise steps towards achieving the maximum results. Any help is greatly appreciated.

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a c 295 K Overclocking
November 18, 2010 4:41:39 PM

Just rise the voltage, and rise the multiplier again. The FSB is used for overclock when the CPU isn't BE.
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November 18, 2010 7:42:52 PM

Ok, gonna try that now. You have got to be the pimp of OC.
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November 18, 2010 7:55:16 PM

Below is a list of all the available voltages in the BIOS I can adjust, can you explain what they all mean???

CPU VDD VOLTAGE
CPU-NB VDD VOLTAGE
CPU VOLTAGE
CPU-NB VOLTAGE
CPU-PLL VOLTAGE
CPU DDR-PHY VOLTAGE
DRAM VOLTAGE
DDR VREF VOLTAGE
DDR VTT VOLTAGE
NB VOLTAGE
NB PCI-E VOLTAGE
HT LINK VOLTAGE
SB VOLTAGE
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November 19, 2010 9:39:46 PM

Which one should I increase?
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November 19, 2010 10:21:28 PM

I figured it out. However, at 19.5x multi I could run stock voltage of 1.375. In order to maintain stability at x20 multi I am running the voltage at 1.425 (Note: it crashed at 1.4 and 1.4125). Should I continue to push the voltage up or be happy with 3.9Ghz?
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a c 295 K Overclocking
November 20, 2010 1:40:18 AM

Hi.

Sorry for the late reply.

If you want keep the CPU for few years, I'd not go above 1.45V or 1.48V.

Regarding the BIOS, you only need rise this:

1- CPU voltage
2- CPU-NB voltage (If you changed the NB frequency, if not set to auto)
3- DRAM voltage (If you set the RAM timings manually)
4- NB voltage (If you change the NB frequency, if not set to auto)
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November 20, 2010 12:06:51 PM

I changed the CPU VDD voltage and this seems to have worked. I ran Prime95 for two hours at 20x multi and nothing crashed. Today I am running a 20.5x multi at 1.475. Hopefully this works. If I can get this to run 4.1Ghz I will be happy as it allows me to beat my friend who hates AMD's and spent 3x what I did to overclock a Core 2 Duo.
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November 20, 2010 12:07:38 PM

Oh, at 1.375v at 20x multi I only peaked at 40C with Prime95. This Tuniq Tower rocks!
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November 20, 2010 4:39:26 PM

Ok, for some reason now everytime I run Prime95 I get the BSOD after about an hour. I am currently running a 20x multi at 1.463v. I've been upping the voltage everytime it happens. Should I keep moving it up. (Note: I am still under 40C.)
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a c 295 K Overclocking
November 21, 2010 1:54:02 AM

Set the multiplier to the last stable one (3.9GHz I think it was) and test with prime95 again.
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November 21, 2010 1:10:56 PM

I did that and it won't stay stable even at 19.5x at stock voltage like it was before. Did I damage this cpu?
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a c 295 K Overclocking
November 21, 2010 3:23:28 PM

Rest the BIOS to default settings, in the BIOS should exist an options that says "load default settings". Use it and test the rig in default speeds.
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November 21, 2010 4:48:51 PM

Nevermind. I put the multi at 20x and voltage at 1.475 and ran Prime95 for over 3hours with no failures!!! Thanks so much.

Once I figure how to upload the screen, I will post the results in the AMD club.
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November 21, 2010 5:12:19 PM

Best answer selected by ahthurungnone.
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a c 295 K Overclocking
November 21, 2010 11:51:39 PM

Nice, enjoy it ;) . If you need more help PM me.
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!