kshafe777

sparetimepc

lucky.peic

Kalverstukas.007
Hi! Nvidia technical support confirmed that RTX A6000 NVLINK bridges (2-slot an 3-slot) will be compatible with RTX 3090, same like RTX 6000/8000 were compatible with RTX 2080/2080 Ti.

I just asked them myself just in case and they said it wont work cause 3090 is bigger card, idk what to think now....

That makes no sense, doesn't matter how big the card is they all have the same nvlink connection. It's all spacing between the cards.

 
actually.. in looking at pics of the rtx 6000 and the 3090s i have, the NVLink posts are different.  i dont think the connectors would work.   

bavor

EVGA_JacobF
No plans for 3 slot at this time.

This is one of the stupidest decisions EVGA ever made.  Most motherboards are 3 slot spacing.  There are very few motherboards that support 4 slot spacing.  It almost makes me think that EVGA didn't even bother looking at what spacing motherboards use before deciding on what slot spacing to release first.  

kshafe777

sparetimepc

kshafe777

sparetimepc

lucky.peic

Kalverstukas.007
Hi! Nvidia technical support confirmed that RTX A6000 NVLINK bridges (2-slot an 3-slot) will be compatible with RTX 3090, same like RTX 6000/8000 were compatible with RTX 2080/2080 Ti.

I just asked them myself just in case and they said it wont work cause 3090 is bigger card, idk what to think now....

That makes no sense, doesn't matter how big the card is they all have the same nvlink connection. It's all spacing between the cards.

actually.. in looking at pics of the rtx 6000 and the 3090s i have, the NVLink posts are different.  i dont think the connectors would work.   

The rtx 6000 and the a6000 are different gpus, the rtx 6000 is the previous release during the rtx 2000 series and the a6000 is to be released sometime this month along with the nvlink bridges that are compatible with them and the rtx 3090s, you're jumping the gun slow down.

 
ok.. i missed that little "a" in there!  thanks for the heads up!  i'll continue to watch.  i was going to return this second card or sell it on ebay.  i'll hold off until that is released and see what comes.  worst case scenario, i sell the second card on ebay.  

thanks! 

rain2_usa
Maybe I'm missing something but for the people clamoring for the 3 slot SLI bridge, are you all planning to do a water cooling loop?  Just curious because at 2.75 slots, a 3-slot SLI is effectively going to kill the top GPU due to lack of air flow of almost any kind and taking in the heat from the backplate of the GPU below it.  My understanding for the 4 slot bridge requirement is to make sure there is airflow between the cards as shipped with a few exceptions.  I honestly don't think any other AIB manufacturer is making a 3 slot bridge anyways specifically labeled for the 3090 series (I could be wrong though on that part). 

bavor

rain2_usa
Maybe I'm missing something but for the people clamoring for the 3 slot SLI bridge, are you all planning to do a water cooling loop?  Just curious because at 2.75 slots, a 3-slot SLI is effectively going to kill the top GPU due to lack of air flow of almost any kind and taking in the heat from the backplate of the GPU below it.  My understanding for the 4 slot bridge requirement is to make sure there is airflow between the cards as shipped with a few exceptions.  I honestly don't think any other AIB manufacturer is making a 3 slot bridge anyways specifically labeled for the 3090 series (I could be wrong though on that part). 

Most people that can afford a pair of 3090s are doing custom cooling.
 
When I ran some non SLI rendering benchmarks with a pair of air cooled 3090's a used a PCIEx16 riser cable to get one of the cards outside of the case to allow for proper cooling.  I was hoping to have EK water blocks by then, but they aren't available yet for the 3090 FTW3 even though EKWB said "available in a few weeks" back in mid October.  I also am not buying Optimus' 3090 FTW3 blocks for several reasons, the price, the fact that optimus products always arrive months later than promised, and Optimus always seems to over hype the performance of their cooling products compared to the competition.

rain2_usa
Maybe I'm missing something but for the people clamoring for the 3 slot SLI bridge, are you all planning to do a water cooling loop?  Just curious because at 2.75 slots, a 3-slot SLI is effectively going to kill the top GPU due to lack of air flow of almost any kind and taking in the heat from the backplate of the GPU below it.  My understanding for the 4 slot bridge requirement is to make sure there is airflow between the cards as shipped with a few exceptions.  I honestly don't think any other AIB manufacturer is making a 3 slot bridge anyways specifically labeled for the 3090 series (I could be wrong though on that part). 

rain2_usa

sparetimepc

lucky.peic

Kalverstukas.007
Hi! Nvidia technical support confirmed that RTX A6000 NVLINK bridges (2-slot an 3-slot) will be compatible with RTX 3090, same like RTX 6000/8000 were compatible with RTX 2080/2080 Ti.

I just asked them myself just in case and they said it wont work cause 3090 is bigger card, idk what to think now....

That makes no sense, doesn't matter how big the card is they all have the same nvlink connection. It's all spacing between the cards.

I think Nvidia means because the card is a 3-slot card, it's too big for the other NVLink's to work.  The only way you'd be able to make that happen is if you use waterblocks on at least 1 card to get it down to 2 or 3 slot to make the other links work.  
Another thing everyone has to remember is that you have to have the exact same 3090 card as well.  The location of the connector is not standardized so it's just all messed up. 

EVGA_JacobF
No plans for 3 slot at this time.

the_Scarlet_one

lucky.peic
I agree, there are only few motherboards that can have 4 slot spacing, most of them are 3 slot

All X99/x299 and ThreadRipper boards are 4 slot, except for the mATX versions.

I am betting this is an NVidia decision which is why none of the AIB’s are supporting 3 slot.

the_Scarlet_one
...
I am betting this is an NVidia decision which is why none of the AIB’s are supporting 3 slot.

EVGA_JacobF
No plans for 3 slot at this time.

kshafe777
so.. i contacted NVidia with the a6000's being released.  their tech support says that the NVLink Bridge will NOT work with the 3090s... so... looks like im going to sell one of my 3090s and will NOT be purchasing from EVGA again. 

lucky.peic
Seems like nvidia is giving different answers to different people, i know few people who were told by nvidia that a6000 bridge will work with 3090 as long as it can fit the card and cooler isnt in the way which shouldnt be problem when you watercool
And some people were told that it wont work due to size, which again i think will be solved by waterblocks, i guess we wont know until someone tests it.....