Are these the best/correct AGP settings (bios)? GF 6800Ultra

[Rhin0]

hey guys,

The last computer I build was in 1997 and i'm blown away by the new options and how much control the new motherboards give you. It is AWESOME. It also comes with a big learning curve. I did the best I could but I wanted to make sure these are all ok.

This is on an FX-55, eVGA GF6800 Ultra, Abit AV8 motherboard:

AGP Settings

AGP Aperature Size- 256mb
AGP 3.0 Mode- 8x/Auto
AGP Driving Control - Auto
--Driving Value DA
AGP Fast Write- Enabled
AGP Master 1 WS Write- Disabled
AGP Master 1 WS Read- Disabled
AGP 3.0 Calibration Cycle- Enabled
DBI Output for AGP Tras- Disabled



Do those look correct? If I need to change something or something will make a big performance difference please explain a little bit about why I need to change it and what exactly it will do (briefly).

Thanks for your help and input. After I make sure I have everything set up ok I will be posting test results and thoughts on my system. Everything is good so far (Knock on wood). If you need any more information please let me know.

Thanks,
Rhin0

 

[Rhin0]

Anyone?

Did I put this in the wrong forum? maybe I should move it...

 

[cubeless]

maybe checkout guru3d for more intense video discussion? i know that i have better stability with fastwrites disabled, and don't see any difference in performance...

 

[Rhin0]

Originally posted by: cubeless
maybe checkout guru3d for more intense video discussion? i know that i have better stability with fastwrites disabled, and don't see any difference in performance...

I will look up what fastwrite does... Do you know right off hand briefly what it does?

I will look up a technical explantion here


thank you

 

[cubeless]

From Adrian Rojak's site www.rojakpot.com :

This BIOS feature controls the chipset's AGP Fast Write capability. Fast Write is a feature which accelerates memory write transactions from the chipset to the AGP device.

Normally, any data meant for the AGP device must be written to the main memory for the AGP device to read. Fast Write allows the AGP device to bypass the main memory and directly access the data. To do so, the AGP device will act as a PCI device whenever the chipset attempts to write to it. This allows the data to be directly written to the AGP device (like other PCI devices), instead of being written to the main memory first.

As you can see, bypassing the main memory saves time and improves the AGP read performance. However, AGP writes (to the chipset) will not benefit from Fast Writes as it will follow normal AGP protocol and write to main memory.

In addition, while PCI signals are used for Fast Write transactions, the behaviour of those PCI signals has been modified and do not follow PCI specifications. Therefore, this feature may cause problems with some PCI cards.

Therefore, it is recommended that you enable AGP Fast Write for better AGP read performance but disable it if any of your PCI cards start acting funny.

Please note that for AGP Fast Write to work, both motherboard chipset and graphics card must support the Fast Write protocol and the data transfer rate must be at AGP2X or faster.

 

[Zardnok]

Fast write off is better IMO.

 

[drpootums]

if i have a 6800gt with 128mb aperature size is that only letting me use 128 mb's of video ram?

 

[drpootums]

bump, i just wanna know about that aperature size...

 

[Rhin0]

I was told your aperature size should be HALF your RAM. eVGA tech support told me this. I set my to 512mb

not much happened, but i'm leaving it there