Will these work for SLI?

[adambeau]

I own these four and i am wondering if any combination will work for SLI. all are 1gb and the last two are made by EVGA.

CARDS: galaxy 560 gtx, asus 460 gtx, 550 ti, 430 gt.

I was planning on using the 460 for phys x and the 560 for graphics but then read the SLI thread on here and realized it probably wasn't possible.

Any answers or comments would be appreciated.

 

[itzdanielp]

Unfortunately for SLI the cards need to be the same. Manufacturer can differ, but model must be the same.

It is suggested that manufacturer match as well.

 

[Helltech]

None will.

 

[alrobichaud]

Even it you have the same card and manufacturer and the ammount of VRAM is different it will not work. For example, a gtx 460 768MB will not work sli'd with a gtx 460 1GB

 

[auntarie]

Even it you have the same card and manufacturer and the ammount of VRAM is different it will not work. For example, a gtx 460 768MB will not work sli'd with a gtx 460 1GB

They will, but both cards will use the smaller memory amount.

 

[Helltech]

They will, but both cards will use the smaller memory amount.

Sometimes, its not guaranteed actually. There are a lot of factors that determine if different memory amounts are SLIable.

 

[Mousemonkey]

They will, but both cards will use the smaller memory amount.

No they won't because the memory bandwidths are different, 192 bit Vs 256 bit.

 

[auntarie]

No they won't because the memory bandwidths are different, 192 bit Vs 256 bit.

See that's a good reason I missed

 

[xtreme5]

you can't sli them they are completely differ from each other you need identical models to work in sli if the brand is differ then no matter it will work but models must be same for example
brand=> (asus) model=> (gtx 560ti) 1gb +brand=> (msi) model=>(gtx 560ti) 1gb = SLI but if
asus gtx 560ti + asus gtx 570 = no SLI.

 

[auntarie]

Yes, I didn't realise at the time that we are talking about different bandwidths. Sorry about that.

 

[adambeau]

Ah i see, great info guys!

 

[alrobichaud]

Yes, I didn't realise at the time that we are talking about different bandwidths. Sorry about that.

Have a quick read of the sli setup FAQ on the Nvidia website. It doesn't say anything about memory bandwidth, though I am sure that is the reason why, but it does state that the amount of VRAM on each gpu in an sli setup must be the same.

 

[Mousemonkey]

Have a quick read of the sli setup FAQ on the Nvidia website. It doesn't say anything about memory bandwidth, though I am sure that is the reason why, but it does state that the amount of VRAM on each gpu in an sli setup must be the same.

Like many FAQ's that one does not get updated frequently enough and it is also very generalized as it doesn't mention the cards with different RAM amounts that can be SLi'd.

 

[alrobichaud]

I can honestly say that I have no idea which ones can. I just assumed that none could based on the info provided by Nvidia.

 

[Mousemonkey]

I can honestly say that I have no idea which ones can. I just assumed that none could based on the info provided by Nvidia.

Nvidia have possibly just tried to simplify it over the years and it was more the older pre 2xx series cards that were released with the same cards having different amounts of RAM, but it seems as though we may be returning to those days.

 

[adambeau]

Best answer selected by adambeau.

 

[Mousemonkey]

This topic has been closed by Mousemonkey

 

[Mousemonkey]

Best answer selected by Mousemonkey.