Specifications

4. Save your options and reboot your machine. Make sure you are running AGP4X and try some 3D
games. Where they might have hung or crashed before they should now be running fine. If not, then
go back into the BIOS Setup and try another value. I've found that values that end in an 'A' seem to
work the best.
If your BIOS Setup does not have the AGP Driving Value option, there are two programs on the Web that
let you modify your BIOS and change this value manually to any value. These programs are called
WPCREDIT and WPCRSET. You can find them at the following website:
http://www.h-oda.com/
WPCREDIT is used to modify the BIOS on the fly. Any value changed will disappear after you do a cold
reboot of your machine. WPCRSET is designed to make the change each time Windows starts up.
I recommend that you use WPCREDIT to try different values and when you get one working use
WPCRSET to make in 'permanent'. Keep in mind that a 'wrong' value might cause you to hang or have a
corrupted display. You might have to reboot. You might want to use WPCREDIT even though your BIOS
Setup has the AGP Driving Value. This might be easier as far as testing goes. Once you get a 'good'
value then you can change it in your BIOS Setup without even using WPCRSET.
Go to the following website for detailed instructions on how to use these programs:
http://viahardware.com/memtweakguide1.shtm
Once you read the article and are familiar with modifying your BIOS then changing the AGP Driving
Value is simple. The Driving Value is located at x'B1'. That's offset Hex, Baker One. Place a DA or EA or
any other value that you might want to try here. Once you save the change it takes effect immediately. If
it does work for you then you can change your BIOS Setup or use WPCRSET.
If you have an ASUS P3V4X motherboard, there is a special utility that you can use to alter the AGP
Driving Value. It is available here:
http://www.users.bigpond.net.au/slop/beta4w.com
If you add the line 'beta4w x' to your autoexec.bat, it will set the AGP Driving Value to FF automatically.

Try setting your memory to run at CAS4 if you have the option, and if not use WPCREDIT to change the
two bits associated with CAS latency to 11. This will lead to a drop in memory bandwidth but may allow
you to enable the other AGP features.
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If you are running your memory at 100mhz and you have the option to set it to 133mhz, try doing so.

You can also try setting the PCI texture memory size settings for Direct3D and OpenGL to their
maximum settings. Although this setting only appears to be useful for PCI cards, it still may help.
However, this fix only works for some people.
Back to Index
Q. I have a VIA 133A based motherboard and the amount of video and texture memory is
reported incorrectly. How can I fix it?

Try changing the 'Video Cacheing Mode' setting in your BIOS to UC (Uncacheable) as opposed to
UCWC (Uncacheable, Write Combining).

Try installing the latest BIOS update for your motherboard. You can get help with finding out what BIOS
you need and instructions as to how to flash it at Wim's BIOS page.

Try installing the latest NVIDIA reference drivers. Drivers 5.16+ may fix this problem.

Try installing the latest VIA AGP drivers.
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GeForce FAQ