Man, so many nay sayers on this subject...
SLi/Crossfire is WIN! PERIOD.
Reasons why two is better than one.
A - 3D Vision
B - Higher AA (32x and above without major FPS impact)
C - Doesn't choke with any OBGE shaders
D - Multi-monitor gaming
E - 3D Vision Surround gaming
F - Able to handle ENB Series
G - Simply better performance at higher resolutions (1900x1200 and above)
H - With 3gb of VRAM, able to crank up ishadow resolution to 4096 or 8192.
A single card would choke on all the above. Unless it were a dual GPU on a PCB.
I agree some people buy the high dollar stuff to brag. I buy it because I actually want my game to look as absolutely beautiful as possible.
1. I don't have it so I can't say whether SLI is needed to run it properly. It sounds cool, no idea whether it really
is cool and whether it even works with Oblivion. My brother had 3D vision a looong time ago when it was new and I heard it uses the same technology now that was used back then (which was about ten years ago). It was not
that great back then and caused a headache after a while.
2. Do you sit in front of your monitor with a microscope? Or is your monitor so large that you can only see 10% of it anyway at the same time? I can't make out a difference between 4x AA and 8x AA on my 19" monitor unless I look closely on a static screenshot. Even if your monitor is super large you will never need more than 16x AA.
3. My single ATI 4890 1GB doesn't choke with OBGE shaders either. I don't use them because unfortunately the ones that interest me have bugs/problems I don't want to play with.
4. Wonder why anyone would need that for gaming...it's a bit like driving with two cars at the same time.
5. Same as 1?
6. I tried ENB series and it didn't kill my performance, but it made the game look worse (imo - matter of taste I guess).
7. True, actually the only point except for 3D vision that I can understand.
8. If you're talking about twice the amount of vram because of SLI then that's not true. SLI doesn't double vram. If you're talking about a single 3gb card then I wonder why it helps explaining why SLI is better.
It's your money and of course there are
some advantages with SLI. But for the majority of players who don't care about one nanopixel less on their screen or about a super duper ultra large shadow map resolution it is simply a waste of money. I can play Oblivion with a huge amount of mods at max settings with a very good framerate - and all that with my good old 4890.