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What is 16xQ AA?

post #1 of 13
Thread Starter 
Well i've looked around but haven't really found a conclusive answer. I read that 2x and 4x AA use MSAA and 8x uses CSAA..but what is the Q part in 8xQ and 16xQ mean?
post #2 of 13
I found this googling:
http://www.overclock.net/nvidia/227900-difference-between-16x-aa-16xq-aa.html

and

http://enthusiast.hardocp.com/article/2006/11/08/bfgtech_geforce_8800_gtx_gts/7
Quote:
These two slides help you understand better what is happening with each antialiasing level. In the first slide notice how for 8X AA (which is a CSAA mode) it increases the coverage samples but keeps the store color/Z samples at 4, just like 4X AA. When you move to 8xQ (which is MSAA) it bumps the stored color/Z up accordingly. At 16X AA (which is CSAA mode) it takes 16 coverage samples, but again knocks the stored color/Z down to 4, just like 4X AA. At 16xQ (which is also CSAA) it bumps the color/Z up to 8X, which is the same as 8xQ MSAA, but keeps the coverage at the high 16X samples.

11628543947eYeHcawZU_7_6_l.jpg
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post #3 of 13
your graphics card's greatest enemy
    
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post #4 of 13
Quote:
Originally Posted by ignite;2624732 
The Q is for Quality which has more color samples than the non Q.

11628543947eYeHcawZU_7_6_l.jpg

Explained more here - http://enthusiast.hardocp.com/article.html?art=MTIxOCw3LCxoZW50aHVzaWFzdA==

Quoted from 2007 tehehe.
post #5 of 13
Quote:
Originally Posted by Roweyi7;13207827 
Quoted from 2007 tehehe.

biggrin.gif I was shocked that it was available that long ago. I doubt that you could use it with any game back then without SLI.
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post #6 of 13
I remember when these first appeared in drivers, the Q essentially means that level of AA but at a performance cost of a lower setting.

Meaning 2xQ would look more like 4x AA but would be much closer to the performance cost of only 2x.
Edited by Ascii Aficionado - 4/20/11 at 5:09pm
post #7 of 13
Thread Starter 
Ya i read that too but i thought there was a simpler explanation lol.
post #8 of 13
Quote:
Originally Posted by Ascii Aficionado;13207889 
I remember when these first appeared in drivers, the Q essentially means that level of AA but at a performance cost of a lower setting.

Meaning 2xQ would look more like 4x AA but would be much closer to the performance cost of only 2x.

"the Q setting means that level of AA but at a performance cost of a lower setting"

I think you meant the opposite: "a higher level of AA, but at the performance cost of that setting"

wink.gif

I'm not entirely sure that's what it is though ... but I remember what you're talking about ...
Edited by brettjv - 4/20/11 at 9:59pm
    
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post #9 of 13
Quote:
Originally Posted by brettjv;13211457 
"the Q setting means that level of AA but at a performance cost of a lower setting"

I think you meant the opposite: "a higher level of AA, but at the performance cost of that setting"

wink.gif

I'm not entirely sure that's what it is though ... but I remember what you're talking about ...

You're probably right, I had the logic correct, but not the details :/
post #10 of 13
Quote:
Originally Posted by Vlasov_581;13207821 
your graphics card's greatest enemy

lol tongue.gif

even more so when you run surround....

but serious... i think it is just a higher quality version...

kinda like the "High Performance", "Performance", "Quality", and "High Quality" setting for the textures...

performance / no Q = Higher Performance/Lower Quality version

Quality / Q = Higher Quality/Lower Performance version

well that is what it seems like anyway
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