Would sli still work ok if....

eggcup · 14 Oct 2011 at 22:55

You had a 570 with a custom pcb (such as a phamtom) and a normal 570 with a standard pcb ?? Just wondering if this would cause any issues or not?

d_brennen · 14 Oct 2011 at 22:59

Should be fine. Electrically they will be the same but the PCB and components will differ

Blackwhite · 14 Oct 2011 at 23:03

as above, should be fine as long as it is the same amount of VRAM on both cards.
Any way SLI quite often has some issues - nothing major but sometimes anoing

d_brennen · 14 Oct 2011 at 23:04

Even with VRAM differences you should be able to SLI them, you only get what the smallest VRAM card has available

Oh and OP I have had a lot of fun on the RSoBB BFBC2 server/s

Surveyor · 14 Oct 2011 at 23:09

d_brennen said:
Even with VRAM differences you should be able to SLI them

You can't according to Nvidia.

eggcup · 14 Oct 2011 at 23:13

d_brennen said:
Even with VRAM differences you should be able to SLI them, you only get what the smallest VRAM card has available

Oh and OP I have had a lot of fun on the RSoBB BFBC2 server/s

Ty dude

Oh cool, well feel free to come back and visit again soon, will be having our 64 man conquest server going live on launch day (hopefully, barring any snags), and others shortly after

Blackwhite · 14 Oct 2011 at 23:13

d_brennen said:
Even with VRAM differences you should be able to SLI them, you only get what the smallest VRAM card has available

Oh and OP I have had a lot of fun on the RSoBB BFBC2 server/s

I don't think so mate.

d_brennen · 14 Oct 2011 at 23:14

Surveyor said:
You can't according to Nvidia.

I'm willing stand corrected

All the info I've seen of SLI says memory differences are ok though? Not used NV since the 8800GTS though, so haven't kept up tbh

Edit: Ahh

http://www.slizone.com/page/slizone_faq.html#c19

Mixed with

http://www.overclock.net/nvidia/969250-can-i-sli-768mb-460-1gb.html

Confusion, for the win

Blackwhite · 14 Oct 2011 at 23:40

GTX460's have not only different size of memory but also different GPU architecture, and 768MB has less bits in memory bandwidth - so it is impossible to run GTX460 768 with GTX460 1GB in SLI - it won't work for 100%

d_brennen · 14 Oct 2011 at 23:42

Where's the official links from NV? I can't find any :/

Blackwhite · 14 Oct 2011 at 23:45

Regarding GTX460s?

Rroff · 14 Oct 2011 at 23:52

RE SLI with different memory sizes - its a bit hit and miss and seems to depend on something in the cards firmware... i.e. in the past I've had an 8800GT (512MB) working in SLI with an 8800GS (384MB) (long story short one of the cards was mis-packaged and had been flased with wrong firmware and I had them setup and SLI enabled before I realised something was wrong) - but I've also tried GTX460 SLI with different memory sizes for someone more recently and it 100% didn't work.

d_brennen · 14 Oct 2011 at 23:52

Regarding SLI compatibility. I've only looked into it because of this thread and I can't see a chart anywhere like this for NV cards

Rroff · 14 Oct 2011 at 23:57

Thats because SLI pretty much locks down which cards you can SLI with what to cards that have the same core revision - which most of the time means the same model. Theres a fairly good reason regarding microstutter why this is done.

Surveyor · 14 Oct 2011 at 23:57

d_brennen said:
Where's the official links from NV? I can't find any :/

Here.

Look in the FAQ.

d_brennen · 15 Oct 2011 at 00:02

Surveyor said:
Here.

Look in the FAQ.

That's a bit pants tbh

Can I mix and match graphics cards with different sizes of memory?
No. For example, an XXXGT 512MB cannot be paired with a XXXGT 1GB in an SLI configuration.

Is that current? With the references to xxxGT cards and all

d_brennen · 15 Oct 2011 at 00:02

Rroff said:
Thats because SLI pretty much locks down which cards you can SLI with what to cards that have the same core revision - which most of the time means the same model. Theres a fairly good reason regarding microstutter why this is done.

Of course

Surveyor · 15 Oct 2011 at 00:11

d_brennen said:
Is that current? With the references to xxxGT cards and all

It's the current FAQ on the Nvidia website.

d_brennen · 15 Oct 2011 at 01:20

Furry muff, still crap really isn't it?

rolypolyman · 15 Oct 2011 at 16:17

Here you go.

SLI: COMPATIBILITY
For some time, SLI was very specific in relation to the type of hardware that could be used. Cards had to be from the same manufacturer, have the same BIOS, same clock speeds; essentially identical. As driver complexity progressed, the limitations have been relaxed greatly. In order to clear up any remnants of confusion that may still linger, here are some pieces of information regarding the procedures for installing cards to be used in SLI: they must be from the same family and be the same model (GTX 560 Ti, GTX 295, 9800 GT, etc.) and must also have matching memory capacities. The cards do not have to be from the same manufacturer, have identical clock speeds, or have matching VGA BIOS versions. The rule used to be that the slower card had to be installed as the primary device, but this is no longer so; the graphics cards can be run asynchronously while in SLI without causing any negative effects in performance or frame constancy.

And the whole article: Linky.