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View Full Version : SLI verses single


wshadow
10-21-04, 10:56 PM
What do ya all think would be better, 6800gt @ultra, or say Two 6600gt in SLI ?

Viral
10-21-04, 10:57 PM
GT@Ultra, and cheaper.

XP_GUN
10-21-04, 11:26 PM
? could you hook up a GT and Ultra together (kngt)

Subtestube
10-21-04, 11:27 PM
Apparently not, but I don't think anyone's actually been able to try yet.

mustrum
10-22-04, 03:14 AM
Get the GT. 2 6600GTs on a expensive nforce 4 board are just too expensive.
If you go SLI you should use 6800GT's at least. (Or start with one and add another later on).

K007
10-22-04, 06:10 AM
The trick with SLI is (and this is guessing) the gpu/mem have to be same freq, and i am guessing there is some bios info as well.

So to use a GT and Ultra

Flash GT to Ultra and there u go

Or flash Ultra to GT and volla O.o?

Subtestube
10-22-04, 06:15 AM
I agree... I can't see any reason a GT and an Ultra *shouldn't* work together, but as no-one's actually tested yet, we just don't know. Oh yeah... and the single GT all the way. It might be a *little* bit lower in terms of raw fill, but when you get to those memory bandwidth limitation issues at really high resolutions with high levels of AA, you'll more than see the advantages of the 6800 GT. The only case that'll fail in is if they release a 6600GT with extra mem... which is always possible I guess. Mustrum is right though - the Nforce 4 MoBo with SLI support won't come cheap.

FD76
10-22-04, 09:08 AM
get the gt.... then get another when ya can.. =)

SLI for teh win!!11

borntosoul
10-22-04, 11:28 AM
guys sli hasnt been tested yet and you all know how fast everything is! why dont we just wait for the reviews to see what the performance is going to be like before we start giving advice. what if 2 overclocked 6600gt's in sli is faster than a 6800 gt o/c???? what then. lets just wait and see.

Nandro
10-22-04, 11:34 AM
I had read a while back that you could use different versions of the same card and that the slower card would just get less work. This may be wrong, because I cant find it now.

Zelda_fan
10-22-04, 11:43 AM
guys sli hasnt been tested yet and you all know how fast everything is! why dont we just wait for the reviews to see what the performance is going to be like before we start giving advice. what if 2 overclocked 6600gt's in sli is faster than a 6800 gt o/c???? what then. lets just wait and see.

actually some numbers have came out.

http://www.hardocp.com/image.html?image=MTA5ODE3MTkzNHFjRGpQa0NobThfMl8xX 2wuZ2lm

seems like it depends on the game. Obviously from those numbers a 2x 6600GT SLI has the raw potential to be faster than a 6800GT, but it looks like it depends on the game. In Doom3 for example the single GT is faster, but in Halo the SLI setup is fastest.

mustrum
10-22-04, 11:57 AM
guys sli hasnt been tested yet and you all know how fast everything is! why dont we just wait for the reviews to see what the performance is going to be like before we start giving advice. what if 2 overclocked 6600gt's in sli is faster than a 6800 gt o/c???? what then. lets just wait and see.
Even then i'd say go for the GT. Then you have the slot still open to add another later if you buy the same mainboard. Why fill those 2 precious slots with to average cards right now?
If you buy a 6600 SLI system it will be outdated at some point. If you buy a system with one ULTRA or GT you just throw in another then.

FD76
10-22-04, 01:09 PM
:lol2: excatly... buy the GT.. best bang for the buck.. without a doubt...

get another gt.. when they come down... then sit back and relax for a while

superklye
10-22-04, 01:34 PM
I want new toys. :(

ChrisRay
10-22-04, 03:06 PM
Well with split frame rendering its my understanding that 2 6600GTS will still have 128 Megs of Memory?

-=DVS=-
10-22-04, 03:11 PM
Two 6600GTS only better then Single 6800GT , Ultra still wins in important parts.
Isn't 6600GT a 8 pipe config with higher clock not like NU with 12 .

Subtestube
10-22-04, 04:26 PM
Well with split frame rendering its my understanding that 2 6600GTS will still have 128 Megs of Memory?

Yes, that's exactly my point. At any time when 1 6600 GT would be memory limited, 2 will be no less memory limited.

fivefeet8
10-22-04, 05:01 PM
Well with split frame rendering its my understanding that 2 6600GTS will still have 128 Megs of Memory?

That's what it sounds like too, but [H] states that:

"While it has not been confirmed, we have the suspicion that some SLI games will actually share the total of the memory between the two SLI cards, effectively giving you a videocard setup with 512MB of memory if you have two 256MB cards"

Interesting. I wonder which games will be able to use the Full 512/256 megs from Sli-ing. And if Nvidia releases 512 meg 6800 Ultras in PCIe, I guess that means 1gig of video memory. :drooling:

ChrisRay
10-22-04, 07:27 PM
They have a suspicion, In other words, They have no clue. And it goes against what the technology indicates it to do.

theultimo
10-22-04, 07:44 PM
Hmm...if its like the older V5/V2 or Rage MAXX, i would suspect only 128MB/256 usuable on both sides mirrored.

Subtestube
10-22-04, 07:45 PM
There's at least one very good reason you'll [probably] only have the effective mem of one:

1. Access time and bandwidth across the intercard connection. Imagine having to constantly re-shift all the textures BACK AND FORTH across the bus and the top clip. I don't know what the effective bandwidth of that top-clip is, but it'd need a hell of a lot to do that kind of thing for potentially every frame. Imagine an [unlikely] scenario where every object is cut at some point by the split frame. If that occurs, both cards need access to ALL currently visible textures. Even assuming that that never happens, whenever you move the camera there's a VERY HIGH chance the cards will need textures stored at the other card VERY often. Being that that's a potentially horrendous bottleneck, you're better off to keep the memory texture and object contents synchronised and just always ref your own memory.