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aperture size

L

lavaheadache

Diamond Member
I was just trying to tweak my system for Doom3 when I was in the bios and changed my aperature size to 512 from 256. I went from not being able to play (35fps ave.) 1280x1024 high quality to running at 55fps ave. on Ultra Qaulity setting. No AA, 16AF
 
512 is totally unnessary. espically considering you have a 256MB video card, all you are doing is hogging your system ram. 256 is all you need...even playing on ultra. i dont see how that would boost your fps that much either.
 
Originally posted by: BW86
Originally posted by: lavaheadache
No, I have an X800 Pro. read my system
Click to expand...

SS's?

Also, I don't get anything when I click your system link.
Click to expand...

I was able to access his rig. It's not a direct link, but once you type in his username, it comes up.
 
How do you make a sig? I have a gig of ram so I figured sharing 512 of it wasn't a bad idea.
Originally posted by: zakee00
512 is totally unnessary. espically considering you have a 256MB video card, all you are doing is hogging your system ram. 256 is all you need...even playing on ultra. i dont see how that would boost your fps that much either.
Click to expand...

I swear to you thats all I did! I run the timedemo and come up with @ 54-55 fps most of the time(after the first run, till the cache gets filled up)
 
I raised the AGP aperature in my system from 64MB to 256MB, and it made my system a lot more stable. I have a 6600GT.
 
Damn, I just ran the video stress test in cs:s and got 90.53 fps at 1280x1024 16AF, 0AA. I can't believe that the aperture size had that much of a benefit! Im getting these results with normal clock speeds + overdrive.
 
I believe it. It does help in certain circumstances (although they are somewhat rare). I remember that increasing my aperture to 512MB made that ATI Ruby demo from last year play (relatively) smoothly on my 9700 Pro, whereas it was not much more than a slideshow on lower aperture settings.
 
Aperture size is a very deceptive figure. These days, you shouldn't set it to more than 1/4 of your RAM as a rule of thumb, but it should be similar to the size of your video RAM (eg 128MB or 256MB for a video card with either 128MB or 256MB onboard).

AGP aperture size is the amound of RAM that you are allocating as dedicated to transferring to/from the AGP bus. The problem with AGP aperture memory is that generally speaking, you want to use the AGP bus to transfer memory to system RAM as little as possible, since system memory pales in bandwidth to that onboard AGP/PCI-e video cards (6.4 GB/s for dual channel PC3200 vs. 25GB/s and up for high end video cards).

I used to go bananas on my AGP aperture size as well before I figured out what it meant.

Now I leave it planted at 256MB of my 1GB of system RAM. Anything more is a serious waste and saps useful memory that you could be using to run more programs 😉 .

kmmatney 64MB is a bit too low for any modern card. I would recommend 128MB to be the minimum, especially if your video card has 128MB of RAM or above.
 
i thought the rule of thumb for aperature size was half your system RAM?

Eg if you have 1gb of RAM you set aperature size to 512mb.
if you have 512mb RAM you set aperature size to 256mb?

Anyone wanna try some benchmarks?
 
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