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Overclocking Voltages: I am hitting a wall.

post #1 of 16
Thread Starter 
Hi guys I have a Phenom II x4 840 @ 3.4ghz (core voltage @ 1.404 volts) with DRAM at 852.5mhz (1705mhz o.c'd) prime95 stable for 10+ hours.



I am having trouble getting the cpu pushed past 3.5 and being stable.



Last night I tried to set a goal to 3.8ghz (eventually to 4.0ghz if I can) and I set the following: (locked multiplier @ 16)

Core voltage @ 1.452 volts and all the way up to 1.53 volts with my FSB @ 231.

VDD NB @ 1.452 volts and all the way up to 1.53 with my FSB @ 231.

HT over Voltage @ 1.20 volts with FSB @ 231

I can't get the computer to post when trying to hit 3700mhz. Can anyone give me suggestions on the three voltages, please? I really want to hit that 3.8ghz then push it to 4.0.

-Thanks!
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Always upgrading
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post #2 of 16
Drop your RAM speed. Or add more RAM voltage.

I see you havent even tried adding RAM voltage...By the way your power supply is holding you back.
    
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post #3 of 16
Thread Starter 
I added 1.65 volts to my DRAM from stock 1.5. I thought 550watts is plenty of power.

What is a recommended voltage for the DRAM?

I might add, overclcking my DRAM to 1705mhz has drastically increase performance in games and opening programs.
Always upgrading
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Always upgrading
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post #4 of 16
Quote:
Originally Posted by ismet View Post
I added 1.65 volts to my DRAM from stock 1.5. I thought 550watts is plenty of power.

What is a recommended voltage for the DRAM?

I might add, overclcking my DRAM to 1705mhz has drastically increase performance in games and opening programs.
Your PSU is not delivering enough power because it's not giving enough amps on each rail, especially when your overclocking, it can put alot of strees on the PSU
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post #5 of 16
Thread Starter 
What's a sufficient enough wattage to reach 3.8 to 4.0ghz?
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post #6 of 16
Quote:
Originally Posted by ismet View Post
What's a sufficient enough wattage to reach 3.8 to 4.0ghz?
It may not be the wattage that is the problem, it's more likely that your psu isn't efficient enough. I would invest in a psu that is at least 80+ certified and from a reputable brand.
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post #7 of 16
Thread Starter 
Ok, thanks.

I gave it another try got to 3.5 again, but couldn't go much further. I think I will stay at 3.41 with ram overclocked to 1705mhz until I get a new PSU.
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Always upgrading
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post #8 of 16
Yeah it's not the wattage. Your current psu gives 25 amps on a single rail but it's not enough. Get something like this:

http://www.newegg.com/Product/Produc...82E16817182200

Basically you want to get a PSU with a Single Rail and 35+ amps.
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post #9 of 16
its not a phenom its a athlon rebranded its only capable of 3.8 max its realy a athlon 2 650
post #10 of 16
Yea, an athlon. check my system to see my settings. Got mine up 2 3.82 but that required alot of vcore.
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