is there more problems with SLI rather than performance? also gtx670 comparrison

[beasty6]

hey guys,

ive read that SLI causes a few annoying problems that eventurly gets people to go back to single gpu setups.

what is micro stuttering ? ive never had dual gpus so i dont know.

also i am going 670 SLI, i am doing it and i am also getting a 2560x1440 monitor, i also play a lot of skyrim and witcher 2 also bf3.

and am i right in saying SLI only uses the top cards VRAM?

so to help support those games at that res, shall i get a 4gb 670 for the top and then a 2gb version for the bottom for the extra power?

it sounds logical and more future proof to me but thought i would ask you guys for your opinions and expiernces with SLI or 670 SLI

 

[beasty6]

looking at the KFA2 EX OC 4GB with the 2GB version

OR

the EVGA SuperClock and the EVGA GTX670 (looks the same as the 4GB version)

 

[Kaapstad]

For Sli both cards need the same ammount of memory for use with a 2560 x 1440 monitor 2gbs of vram is fine.

 

[whyscotty]

For Sli both cards need the same ammount of memory for use with a 2560 x 1440 monitor 2gbs of vram is fine.

+1

 

[andybird123]

I run 1440p and 670 SLI (2GB) and I don't have any problems with microstutter or games not running or whatever other problems you hear reports of about multicard setups

as mentioned above - it doesn't just use the top cards VRAM - the VRAM needs to be duplicated to both cards so that they both know what they are doing - SLI only works if both cards have the same amount of VRAM

micro stutter is where although reported FPS is high you get the occaisional stu...tter which is jarring and annoying

3 screen setups are currently borderline on 2GB - however you need to be running settings that 2 cards can't run anyway so unless you are going to get 3 cards there is no point getting a 4GB card - a single 1440p currently has next to no issues running on 2GB cards on maximum settings

if you play skyrim with a lot of mods or like extreme amounts of AA then you might consider 4GB cards, but then as mentioned you would also more than likely need 3 cards to really make use of it

you might find though that an i5 760 becomes a bottleneck for 670SLI at some point... probably not right now in current games but with 670 SLI I would say that your CPU then becomes the potential weak point if you have one

 

[Rusty0611]

^ +1

 

[Gripen90]

At 2560x1440 res the CPU will not bottleneck that much since the load is primarily on the GFXs and that it what will influence the game performance.

I've run SLi setups permantly since 2006 and the problems I had can be counted on one hand.

 

[Kaapstad]

I started playing BF3 last night for the first time, 2 gb of vram @1600p is fine.

The nearest I got to micro stuttering was my hands on the keyboard and mouse trying not to get killed. Im useless at FPS games.

 

[beasty6]

Okey dokey, two 2gb cards it is then.

Whats the best card to go with? (want a black pcb)