Additional information:
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Q: In my BIOS setup there is a video configuration submenu that allows the user to specify an AGP aperture size. I have the Diamond Viper V770. What would this do to my machine if I raised the aperature size to 256MB?
A: AGP (Advanced Graphics Port) is Intel's newest expansion bus design. It enables video cards to access system memory to store texture maps and offers a higher-speed bus-- currently twice that of the PCI bus. The AGP aperture setting specifies to the AGP chipset how much of a PC's system memory, including virtual memory, is addressable by an AGP video card. While an AGP chipset can address up to 4GB of memory, the limit is usually placed at 256MB. You can extend the aperture beyond actual system RAM, and the AGP chipset will use the available memory. The aperture size settings will be different, depending on the BIOS manufacturer. Some will allow greater range of settings, while others (like yours) offer a limited selection.
As for the settings for your Diamond V770, you should leave it at the default of 64MB. Most video cards come equipped with enough local memory (the RAM on the video card) to meet most gaming needs. In fact, most games don't take advantage of AGP memory because the current 2x is too slow compared with the speed of local memory. A few games take advantage of AGP memory, like Quake III and Trespasser, but until 4x AGP comes out in the fall most game developers will shy away from the AGP memory.
Note the following, however. Owners of TNT2 boards have reported some problems with running their cards at different aperture settings. The fix in most cases is a reduction or increase in the AGP aperture size. Matrox has found some problems with Phoenix BIOS with its G400 at 64MB, and likewise with ATI, which has had problems with its cards at a 128MB.
I changed my AGP aperature size from 64mb to 256mb. When I did this i lost my video. with out video i can not get back to the bios to change the setting back. i have tried another pci video card and an isa video card neither of them worked. i have tried resetting the bios using the jumper and i still cant get it to work. any suggestions? Thanks, Kevin
i cant even get anything to appear before windows starts. normally it would check the memory and show the detected harddrives and processor speed. now all i get is a black screen from the start. P.S. it does not make any beeps indicating that something is wrong
Karell
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2.5K Posts
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January 2nd, 2002 14:00
Thank you for using the DellTalk forum.
The optimal setting is 64MB.
Additional information:
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Q: In my BIOS setup there is a video configuration submenu that allows the user to specify an AGP aperture size. I have the Diamond Viper V770. What would this do to my machine if I raised the aperature size to 256MB?
A: AGP (Advanced Graphics Port) is Intel's newest expansion bus design. It enables video cards to access system memory to store texture maps and offers a higher-speed bus-- currently twice that of the PCI bus. The AGP aperture setting specifies to the AGP chipset how much of a PC's system memory, including virtual memory, is addressable by an AGP video card. While an AGP chipset can address up to 4GB of memory, the limit is usually placed at 256MB. You can extend the aperture beyond actual system RAM, and the AGP chipset will use the available memory. The aperture size settings will be different, depending on the BIOS manufacturer. Some will allow greater range of settings, while others (like yours) offer a limited selection.
As for the settings for your Diamond V770, you should leave it at the default of 64MB. Most video cards come equipped with enough local memory (the RAM on the video card) to meet most gaming needs. In fact, most games don't take advantage of AGP memory because the current 2x is too slow compared with the speed of local memory. A few games take advantage of AGP memory, like Quake III and Trespasser, but until 4x AGP comes out in the fall most game developers will shy away from the AGP memory.
Note the following, however. Owners of TNT2 boards have reported some problems with running their cards at different aperture settings. The fix in most cases is a reduction or increase in the AGP aperture size. Matrox has found some problems with Phoenix BIOS with its G400 at 64MB, and likewise with ATI, which has had problems with its cards at a 128MB.
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