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Q9550 Overclock- VID settings not working?

post #1 of 17
Thread Starter 
So I've been trying to change the VID on my Q9550 to get it to a higher clock speed. When I change it in my motherboard's bios, it doesn't seem to take effect. Here are two screenshots of my bios and my desktop when running a burn test.

Can you guys think of anything I'm doing wrong?



http://i45.photobucket.com/albums/f7...screenshot.png

If you can't see the desktop screenshot very well, CPUID is showing a VID of 1.280V and AIDA64 is showing a VID of 1.225V.

Edited by metalfox7 - 2/23/11 at 7:26am
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post #2 of 17
You can't change VID w/o doing some pad modding. VID is a fixed value assigned to the chip from Intel that tells the mobo what voltage to apply. It's for stock settings. You are talking about vcore or core voltage.

Use CPU-Z's Core Voltage under load as your measuring point. Does that number change when you change the BIOS CPU Voltage setting?

FYI, you probably won't need more than 1.3v under load for 4GHz, but I doubt that 780i mobo will let you get the FSB that high (471) on a 45nm quad. You might be able to get 450FSB which gives you 3.825GHz and that won't require much vcore at all.

I would temporarily reduce the CPU multi to 6, and work on getting the FSB stable as high as possible using VTT and NB voltage. I wouldn't use auto on any of those settings; you only have a few...experiment and find each one's sweet-spot.
post #3 of 17
My q9550 isn't stable with anything less then 1.34 at 4.0GHz.
post #4 of 17
Quote:
Originally Posted by Segovax View Post
My q9550 isn't stable with anything less then 1.34 at 4.0GHz.
Is it an E0?

Have you optimized VTT, NB voltages, GTL settings, and PLL?
post #5 of 17
Quote:
Originally Posted by jason4207 View Post
Is it an E0?

Have you optimized VTT, NB voltages, GTL settings, and PLL?
Yes it's an E0. I also have 4x2Gb sticks of memory, and yes I feel like my VTT, PLL, and voltage settings are correct. My GTL settings I played with a ton but nothing I ever did seemed to be more or less stable.
post #6 of 17
These quads needs a tad more Volts when using 4x2GB RAM in these P45 boards. Have tested it.
    
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post #7 of 17
Turn off Speed Step while you're at it. The voltage reading is at idle with the multiplier @ 6. Check the voltage under full load.
post #8 of 17
Thread Starter 
Thanks for your replies- rep to the helpful ones!

Here are some other options in my bios.



When my CPU is fully loaded, CPU-Z shows a core voltage of 1.280V. It never moves from that value, even when the cpu is idle.

What exactly is VTT? I dont know if I have seen anything about it in the overclocking guides I have read.

The temps have certainly increased, which would indicate the vcore is higher.
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post #9 of 17
Disable Speedstep and C1E
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post #10 of 17
It´s a refrence voltage "to measure" the vcore to be able to apply an exact vore.
// does this make any sens to you?
http://www.edgeofstability.com/index.html
I got in my bios 3 options auto, 1.2V and 1.3V.
Since i never had problems i left that @auto
Like v_drop said: "Disable Speedstep and C1E"
You don`t want that your CPU downclocks itself (i hope so!)
Also disable virtualization-stuff unless you want run some VM and stuff like that.
Good Luck!
Edited by Mr.Eiht - 2/23/11 at 11:43am
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