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Trouble with SLI

Dust-Mite

Dust-Mite

Dust-Mite

Associate
Joined
26 Nov 2013
Posts
6
Hi guys been having this problem with trying to SLI my 2 460's. That hopefully someone will be able to help with

My computer set up is
Mobo: ASUS Z87-A
CPU: Intel I7-4770K
RAM: 16GB Crucial
PSU: 750W XFX Pro XXX Edition
Graphics 1: Gainward GTX 460 1GB Golden Sample
Graphics 2: eVGA GeForce GTX 460 (1024 MB)
HDD1: 150GB Samsung
HDD2: 1TB WD
HDD3: 500GB WD
HDD4: 2TB Seagate

I have tried everything I can think of to get the SLI option to show up in the NVIDIA control panel.
The cards have been reseated
I have swapped them round reinstalling drivers both ways
Booted with and without the SLI board
Tried multiple SLI boards

The drivers for the graphics cards are fully up to date and the BIOS version for the mobo is fully up to date aswell.

I have even tried out HyperSLI to no result

As far as I can see there is nothing stopping these cards from SLI'ing. If anyone can help I would really appreciate it.
 
So the SLI PCB is across the cards?
The cards are plugged in (if they need to be)?

SLI is always disabled by default, you are saying the option is clearly not there?

Have you checked in device manager to make sure both cards are showing?
 
Hi,

I'm not sure that this will be of much help I'm afraid, but I have had a similar experience with a pair of 768MB 460s. Like you, I tried all sorts to get SLI to enable but it would not. In my case, it seemed to be caused by the fact that the cards were not being reported as being the same type, even though they were both 768MB 460s. One was factory overclocked whilst the other was not. This wouldn't normally matter, but looking at them both in GPU-Z showed that they had different product identifiers that, I believe, led the driver to think that they weren't compatible products. Normally, factory overclocked cards don't show up as a different product type. In this case, they did. Are your cards clocked at different speeds?

I didn't bother trying to get it working once I discovered this... I luckily managed to find an identical card to my original one (second-hand). SLI worked perfectly with this pair. I ended up donating the other card to my brother!

It is too late for me to try it - all my 460s are gone - but I now wonder whether it would be possible to flash the BIOS of the faster card to match the slower one (or perhaps flash them both to the "reference" BIOS) and get SLI to work that way.

However, I am not sure whether flashing a non-reference card with a reference BIOS could brick it!? Perhaps someone else with more knowledge in this area might be able to shed some light on this?

Sorry for not being able to offer a definitive solution, but I hope this helps in some way.

All the best,

Martin
 
no_1_dave said:
So the SLI PCB is across the cards?
The cards are plugged in (if they need to be)?

SLI is always disabled by default, you are saying the option is clearly not there?

Have you checked in device manager to make sure both cards are showing?
Click to expand...

Yep the SLI PCB is across the two boards. And I have tried multiple ones

Both cards are plugged into the 16x PCI-E slots on the board

The option is not appearing at all in the NVIDIA control panel

Both cards are showing as
NVIDIA GeForce GTX 460
NVIDIA GeForce GTX 460 v2

Screenshots
Device Manager: http://i.imgur.com/FA27Q41.png
NVIDIA control panel: http://i.imgur.com/TCxZlE7.png
GPU-Z 460: http://gpuz.techpowerup.com/13/11/27/2dn.png
GPU-Z 460 v2: http://gpuz.techpowerup.com/13/11/27/b97.png


The GPU's are at different speeds so I wonder if this is the cause. I would prefer not flashing them but if this was to work
 
According to the webpage the board is SLI Ready and it came with a SLI board, from that I suspect its ok to SLI with.
And according to both GPU-Z and the BIOS both cards are running at x8 yes
 
It looks like your cards are not compatible, one is GF104 and the other is GF114

Using Coolbits may help

I may be out of my depth here but, this is the only thing I could come up with
 
Like whyscotty said:
GTX460 V2 GF114 = 192bit bus
GTX 460 GF104 = 256bit bus

And therefore you can't sli them.
 
Last edited:
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