AGP MHZ? What do I do with this BIOS Setting?

[RollWave]

I have it set at 245 with a 5:6 divider with 9 mult and 4xLDT and the memory at 2 3 3 7 1T


What do I need to do with the AGP MHZ? The settings are 66mhz, Sync with CPU, and then a number in the 70s.

 

[JohnAn2112]

Set the AGP to 66 to lock it.

 

[RollWave]

ok, thats what I did. Hopefully this system will stay stable.

EDIT: I have a 256mb card. Should I set the aperture to 256 as well? Right now its at 128.

EDIT #2: My first OC of this system had issues when playing games (BF2). It would just restart and then eventually windows got corrupted. I did not lock the AGP mhz then, could this setting possibly fix that issue?

 

[pcgeek11]

Originally posted by: rnp614
I have it set at 245 with a 5:6 divider with 9 mult and 4xLDT and the memory at 2 3 3 7 1T


What do I need to do with the AGP MHZ? The settings are 66mhz, Sync with CPU, and then a number in the 70s.

By locking it at 66 this prevents video corruption from the overclocking of the system, as the AGP is a derivative of the system clock normally. Without locking the AGP as system bus speed increases from overclocking the AGP bus speed also increases, some cards do not play well with this side effect.

pcgeek11

 

[RollWave]

So you would say that the Stability issues I had could be solved? My vid card is a AIW ATI X800XT.

 

[SrGuapo]

Would actually speeding up the AGP port increase performance any? Doesn't this just increase the bandwidth (something that current cards can't even reach yet)?

 

[Fern]

Originally posted by: rnp614

EDIT: I have a 256mb card. Should I set the aperture to 256 as well? Right now its at 128.

I'd leave it at 128MB.

HERE'S an AGP ap guide. Seems the more vram your card has, the less system ram you need for the agp aperature setting.


Fern

 

[pcgeek11]

Originally posted by: rnp614
So you would say that the Stability issues I had could be solved? My vid card is a AIW ATI X800XT.

Yes, it could be.

Would actually speeding up the AGP port increase performance any? Doesn't this just increase the bandwidth (something that current cards can't even reach yet)?

Yes barring instability and corruption problems.

Bandwidth =

(1) A range within a band of frequencies or wavelengths.

(2) The amount of data that can be transmitted in a fixed amount of time. For digital devices, the bandwidth is usually expressed in bits per second(bps) or bytes per second. For analog devices, the bandwidth is expressed in cycles per second, or Hertz (Hz).

The bandwidth is particularly important for I/O devices. For example, a fast disk drive can be hampered by a bus with a low bandwidth. This is the main reason that new buses, such as AGP, have been developed for the PC.

The AGP standard is 66, if you try to Force more than the card or bus can handle you get artifacts and video corruption and could also damage the card / motherboard.

pcgeek11

 

[RollWave]

crap! Glad I locked it at 66. So far I havent had any more crash restarts. Just BF2 crashes which seem to happen to everyone. Hopefully thats overwith after this patch!