128MB AGP Aperture on 8RDA+ Revision 2.0(BAD)

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10-09-2003, 05:10 PM
speedstream5621

128MB AGP Aperture on 8RDA+ Revision 2.0(BAD)

Whenever I set the aperture to 128MB, it will force a CMOS reset upon me. It simply will not POST or boot at 128MB. This was with the stock BIOS.

I updated the BIOS a while ago, but last night I tried 128MB and it worked fine. Then, this morning, it wouldn't POST. I reset and put everything back to where it was with exception of the aperture and it works fine now. I thought the new BIOS had fixed this last night, but it is quite clear that is not the case.

My ECS K7S5A(KT266) did 128MB fine with the same video card.

Anyone have any ideas as to why this is happening? I know the performance difference is minimal at best, but I'd like to know why I am having these problems anyway.

Thanks.
10-09-2003, 05:26 PM
XP1800

Did you up the AGP voltage at all? I remember you talking about that once.

As you know, I have the new BIOS now and my aperture is at 256. I'll try setting it to 128 and see what happens.

*crosses fingers*

edit: YGPM
10-09-2003, 06:09 PM
speedstream5621

Quote:

Did you up the AGP voltage at all? I remember you talking about that once.

As you know, I have the new BIOS now and my aperture is at 256. I'll try setting it to 128 and see what happens.

*crosses fingers*

edit: YGPM

No, I didn't increase the voltage. I guess it could be that the AGP bus is at 85MHZ, but with the old BIOS 128MB wouldn't work with stock(66MHZ), so I don't think the bus speed is to blame.

I didn't get a PM either.
10-09-2003, 06:42 PM
XP1800

Well you saw my test results, back to the drawing board I guess:(
10-09-2003, 06:56 PM
speedstream5621

What would that be? Try to RMA a board that has half a tube of epoxy on it?:D:D:eek:

I don't need 128MB, but I think its weird...
10-09-2003, 09:02 PM
lycurgus

So it's just an AGP aperture of 128MB that doesn't work? With the memory on current video cards any setting from 64MB to 256MB will likely work just fine. As long as you can find one setting or another that works it's probably easiest to just set it to that and forget about it.
10-09-2003, 09:10 PM
speedstream5621

Quote:

So it's just an AGP aperture of 128MB that doesn't work? With the memory on current video cards any setting from 64MB to 256MB will likely work just fine. As long as you can find one setting or another that works it's probably easiest to just set it to that and forget about it.

I really don't care at all. I'm just curious as to why it doesn't work.:)

I guess I could try 256MB and see what happens.
10-09-2003, 10:38 PM
Malone

It's been my experience that the lower the AGP aperture, the better. If you have a 128MB vid card, setting the aperture to 64MB will suffice. In my case, when I set it to 128MB I lose about 1,000 3dmark2001 points.
10-09-2003, 11:18 PM
speedstream5621

Quote:

It's been my experience that the lower the AGP aperture, the better. If you have a 128MB vid card, setting the aperture to 64MB will suffice. In my case, when I set it to 128MB I lose about 1,000 3dmark2001 points.

You lose 1K 3DMarks???:eek: I noticed a small gain(less than 50) when going to 128MB.
10-09-2003, 11:23 PM
lonewolfroger

I just set mine to 128 and it does fine, but my MB is the Rev. 2.1.
10-09-2003, 11:28 PM
mikeysg

Noob question:o , what the heck does aperture size do anywayz? And how does it affect performance?:confused: I've got my AMD at 512mb and my Intel rig at 256mb.:)
10-09-2003, 11:29 PM
speedstream5621

Quote:

I just set mine to 128 and it does fine, but my MB is the Rev. 2.1.

XP18004life's Revision 1.1 works fine at 128MB too. Possibly an issue with the Revision 2.0 boards? Though one person experiencing no problems from the other two boards is hardly conclusive.:D;)
10-11-2003, 12:17 PM
Malone

Quote:

You lose 1K 3DMarks??? I noticed a small gain(less than 50) when going to 128MB.

Yeah, I thought it was strange too, apparently I'm alone on this one though, so maybe my motherboard is wierd or something.
10-11-2003, 12:56 PM
AMD Inside

Quote:

Originally posted by mikeysg
Noob question:o , what the heck does aperture size do anywayz? And how does it affect performance?:confused: I've got my AMD at 512mb and my Intel rig at 256mb.:)

AGP Aperture doesn't really mean much today. Back in the day, when we had 8MB and 16MB video cards, and they ran out of memory, the computer would then go to main system memory until some video card memory freed up. The Aperture size is the amount of system memory that could be used for video.