please tell me what AGP fast writes do?

[leeperpsu]

what exactly does AGP fast writes really do?? does it improve performance in real world applications?? i've heard it causes instability...?

i had it enabled and when i was playin max payne for about 2-3 hours my computer just rebooted, is that an issue with fast writes?
then when i disabled it and lowered my oc on my videocard, i looped 3dmark2001se for a few hours and my computer made it through.

could that reboot just be a fluke or is it something other than fast writes or video card overclock.

 

[fell8]

I believe fast write allows the Vid card to access system menory directly, without having to go through the CPU (I could be wrong). Try leaving the OC lowered and enable the fast write and see if a few hours of Max Payne will make it fail again.

 

[leeperpsu]

anybody else?

 

[leeperpsu]

bump

 

[leeperpsu]

5 bucks to the first answer!!!

 

[DAPUNISHER]

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.

Now I'll PM you where to send the 5$ paypal

 

[leeperpsu]

but will enabling it cause reboots and unstability??

will it actually increase my performance...aka increase 3dmark scores??

your almost to the 5 dollar mark....keep it up

 

[DAPUNISHER]

but will enabling it cause reboots and unstability?? There's no definitive answer, but ATI cards do quite often have stability issues with fast writes enabled.

will it actually increase my performance...aka increase 3dmark scores?? Yes, if it's functioning and the card is stable it will trnslate in to a small performance increase overall, but increasing the 3Dmark score means dick so why care?

your almost to the 5 dollar mark....keep it up Now, take that 5$ and buy a clue

 

[WarCon]

Originally posted by: DAPUNISHER
but will enabling it cause reboots and unstability?? There's no definitive answer, but ATI cards do quite often have stability issues with fast writes enabled.

will it actually increase my performance...aka increase 3dmark scores?? Yes, if it's functioning and the card is stable it will trnslate in to a small performance increase overall, but increasing the 3Dmark score means dick so why care?

your almost to the 5 dollar mark....keep it up Now, take that 5$ and buy a clue

You been Da Punished......

 

[Khyron320]

I tested it with 3dmark2001se on an a7n8x deluxe with 9700 pro and i only lost 30 marks by turning it off... After having it on so long and now i have stability with it off i strongly believe fast writes are specifically designed to crash you pc. GG graphics industry