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955 overclock

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  • CPUs
  • Overclocking
Last response: in Overclocking
November 19, 2010 12:58:18 AM

Hello,
I'm trying to overclock my AMD 955 to 4Ghz but i can only run prime95 for 15-20 min before i get a blue screen or my pc reboots, i tried different combination of CPU core multiplier, HT ref. clock... I raised my voltage to 1.475 but my CPU temperature went up to 60 C.

Any suggestions to have more stability?

Also I'm planning to have another 4870 in crossfire, would i have to upgrade my PSU?

AMD Phenom II X4 955 Black Edition
MSI 790FX-GD70
XFX Radeon HD 4870 1GB 256-bit GDDR5
G.SKILL 2GB (2 x 1GB) 240-Pin DDR3 SDRAM DDR3 1600
Thermaltake Contac 29 120mm CPU Cooler
hec X-Power Pro 600W

More about : 955 overclock

a c 243 K Overclocking
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November 19, 2010 1:57:55 AM

try increase Vcore & set drop RAM ratio increase RAM max 1.65
disabled Power Now & C1e Disabled,
4870 power consumption 278 your PSU enough for Crossfire
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a c 311 K Overclocking
a c 174 à CPUs
November 19, 2010 4:05:42 PM

Hi alex2399 and welcome to Tom's forum.

1- What 955 model do you have? C2 or C3.
2- 60ºC isn't good and something above that is hurt your CPU in little steps.
3- Regarding the SPU, let me know the exact model that you have.
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November 19, 2010 10:27:32 PM

Listen to Saint. He is helping me with my overclock with great success.

My first impression is that your voltage is way too high and/or your cpu cooler is inadequate. Go to www.frostytech.com and it lists the best AMD coolers. This is where I discovered the Tuniq Tower 120 Extreme and have yet to see any temp above 36C running Prime95. (P.S. I am running 1.425v x 20multi (4.0Ghz) on Prime95 right now as I type!)

I am assuming you already have Coretemp and are running it while you run Prime95.
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November 19, 2010 10:35:14 PM

You should need another PSU. Regardless what others say 600W will run two GPUs unless you have tons of other components.
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November 19, 2010 10:35:44 PM

I'm sorry. You should NOT need another PSU. (One word makes a big difference.)
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a c 243 K Overclocking
a c 139 à CPUs
November 19, 2010 11:28:34 PM

:D 
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November 19, 2010 11:44:28 PM

Thank you all for your response.

ahthurungnone, for my CPU voltage, i took these numbers from sites like techreport (overclock made by the editor), my cpu cooler looks okay for now, if i invest in something i would prefer buying an SSD drive to see my pc boot in half the time it takes now. My PSU is 600W but not 80 plus so i'm pretty sure it's not real numbers (paid it 50$ with 15$ discount...).

saint19, my CPU is an c3 revision. SPU? you meant PSU?

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a c 311 K Overclocking
a c 174 à CPUs
November 20, 2010 1:52:44 AM

alex2399 said:
Thank you all for your response.

ahthurungnone, for my CPU voltage, i took these numbers from sites like techreport (overclock made by the editor), my cpu cooler looks okay for now, if i invest in something i would prefer buying an SSD drive to see my pc boot in half the time it takes now. My PSU is 600W but not 80 plus so i'm pretty sure it's not real numbers (paid it 50$ with 15$ discount...).

saint19, my CPU is an c3 revision. SPU? you meant PSU?


1- NEVER use the settings that you find on Internet. Why? Because even with the same hardware, you will not get the same overclock results. Just read the basic things and do it your self, overclock is test-fail.
2- Yeah, I mean PSU, but for the price that you say I'm pretty sure that you will need a real PSU for Crossfire.
3- For your C3 and the 4GHz you maybe need a voltage between 1.4V and 1.5V. As always, keep your eyes in the temps and something equal or above 60ºC isn't good.
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November 20, 2010 2:43:14 AM

saint19 said:
1- NEVER use the settings that you find on Internet. Why? Because even with the same hardware, you will not get the same overclock results. Just read the basic things and do it your self, overclock is test-fail.
2- Yeah, I mean PSU, but for the price that you say I'm pretty sure that you will need a real PSU for Crossfire.
3- For your C3 and the 4GHz you maybe need a voltage between 1.4V and 1.5V. As always, keep your eyes in the temps and something equal or above 60ºC isn't good.



Yeah well with 1.475 i get 60 Celsius after 1 hour of prime95 so i think i will lower it to 3.9Ghz and 1.425... farewell 4Ghz... :( 

By the way how can i know if my PSU is weak? Haven't got any issues with it so far.

Thanks.
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December 6, 2010 3:44:44 PM

Best answer selected by alex2399.
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a c 311 K Overclocking
a c 174 à CPUs
December 6, 2010 5:22:35 PM

This topic has been closed by Saint19
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