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Project FX5500 Overclock - Page 4

post #31 of 35
Quote:
Originally Posted by Renegade5399
In Nibitor go to tools, then voltage table editor and change entry 1. Then go to the voltage tab and select the new voltage value you just entered from the drop down.

And: Welcome to the forum!
Thanks for the welcome! Yes, I have tested as you indicate and then searching for the hex strings in X-BIOS Editor and the changes are made. I am off to test with vgabios.exe... if I can find a copy.

BTW, why not try for, say, 4 timings? Can you not then choose which to apply, or will the card default to the first in the list anyway?

Hlafordlaes
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post #32 of 35
Thread Starter 
Quote:
Originally Posted by Hlafordlaes
Thanks for the welcome! Yes, I have tested as you indicate and then searching for the hex strings in X-BIOS Editor and the changes are made. I am off to test with vgabios.exe... if I can find a copy.

BTW, why not try for, say, 4 timings? Can you not then choose which to apply, or will the card default to the first in the list anyway?

Hlafordlaes
I try and stay away from the timings ends of things as that can turn into a major headache in no time flat. Of course, if you are good with such things, by all means, give it a shot.
post #33 of 35
Quote:
Originally Posted by Renegade5399
I try and stay away from the timings ends of things as that can turn into a major headache in no time flat. Of course, if you are good with such things, by all means, give it a shot.
Oops, I meant 4 different voltages (not gonna touch the timings either). Been reading a post http://www.nvnews.net/vbulletin/show...t=29230&page=1 that really goes into this for another card (FX59xx), and so far can conclude that I cannot tweak for more than the default setting as you did. Reason being, according to the post, is that the extra voltage values have relation with another lookup table (PLVI) in order to activate them. I think in the FX5500 is fixed at one PLVI entry, so no sense in creating more than one voltage. If I find out differently then I will report.

End of the story is that I still gotta do the mod. Think I'll ensure I can do a blind flash of the default bios first so I can recover.

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post #34 of 35
Thread Starter 
You are correct. The 5500 has only 1 entry for the voltage table. It doesn't contain space for any other entries.
post #35 of 35
Done! The card certainly seems more stable at higher clock rates, as I have achieved my highest benchmarks to date. BTW, I also adopted the 71.20 driver, which seems solid.

I added higher clock and mem rates at the same time, and these let the card accept o'clocking much better.

Can't report much, since to do this in earnest I have to put some decent cooling on the card, and I have a doubt about the reliability of the stock fan as it is already. I cannot yet test if the 1.7v mod has a measurable effect, since I'll need to o'clock for longer periods and will need to flash with and w/out this tweak to see.

Meanwhile, here's a link to a HW-based approach on an NV34 chip card (5200) that seems promising: http://www.ocforums.com/showthread.p...5&page=1&pp=30

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