Dell Precision T7910 RTX 3090, will it fit and power

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I have a Precision T7610 with a Nvidia GTX 1080 ti and Quadro P4000 installed.  Same chassis size and shape as yours.  I can tell you for a fact that the RTX 3090 Nvidia showed the world will NOT fit in either of our towers.  It is too tall, you will never get to side panel back onto the tower with this card installed.

The reference design RTX 3080 and 3070 will fit without any issues.

From a power standpoint, you should be able to run 2x RTX 3090 cards without any issues, but you would only be able to get 1 RTX  3090 card installed because of the card slot arrangement.  Each RTX 3090 takes 3 card slots.
Here is the PCI-e slot arrangement on your tower.

PCI-e 16x : only when 2nd CPU is installed
PCI-e 16x : only when 2nd CPU is installed
       RAM         RAM
       CPU1       CPU2
       RAM         RAM
PCI-e 4x : full length slot
PCI-e 16x
PCI-e 4x : full length slot
PCI-e 16x
PCI slot

You could easily fit and power 3 RTX 3080 or 3070 reference design cards. but only a single RTX 3090 (with the side panel off)

Thanks for these informations. I'm in the same situation and I was affraid that the Nvidia 3080 would'nt fit. 

Theres another issue in that the cover wont close if the card is too tall.

I use a sledge hammer to fix that with cover off I smash the cross brace down so a taller card fits.

225w is based on 2 6 pin aux pci-e  which can use a single 8 pin with adapter to convert dual 6 to single 8

https://www.dell.com/support/kbdoc/en-us/000140822/

The cable from pdu board is very specific

power board with cables

Spec

The cables are very specific

gpu cablepower board

@Blowoffvalve @JamesJAB1 The new RTX 3090 "TURBO" cards from Asus and Gigabyte will fit (I believe):

Both of these are standard two slot sized cards with blower type fans and two 8-pin power connectors at the back, similar to a Quadro/Tesla. I am seriously considering putting two of these into my T7910.

Currently, my T7910 has one Quadro K6000 and two Tesla K40's installed, with no issues. The total power draw of my setup is 715 watts, which is higher than the projected 700 watts of twin TURBO cards.

I am assuming that you have a 1300 watt PSU?

Both of those blower style cards will fit perfectly, plus they have the power connectors on the back end of the cards.  This means that you will be able to use them in the top PCIe ports without the side panel latch mechanism getting in the way.

On a side note...  Blower style cards run cooler than standard consumer cards in the Precision T7600, T7610 and T7910 cases.

Yes, they run cooler because the heat is blown out of the case instead of into it. Having the power connectors at the back is much better too. I never did like them at the top.....unsightly!

I'm in the same situation.  I have a Dell T7910 with a Quadro K4200 and I really need to upgrade my GPU. 

Is there someone who Actually tried it ? 

The PCI-E slot itself supports 75W

A PCI-E 6 pin connector adds 75 W

A PCI-E 8 pin connector adds 150 W

Slot alone: 75W

Slot plus 6: 150W

Slot plus 8: 225W

Slot plus 6 plus 8: 300W

Slot plus 2x8: 375W

You need the watts, but you have to supply them with the right form factor PCI-E plugs.  

At least in theory.  I think that the T7910 has one 8 and a dual 6.  So if you get an adapter  (dual 6 to single you have two 8 pin plugs and 375W. 

The 3080 is rated as needing 380 watts, and uses a proprietary 12 pin connector.  There is a dual 8 to single 12 pin adapter that allows the physical plug to work, and some people have found that this setup works.  

Linus Tech Tips tried to run dual 3090s (!) with SLI (didn't work well) using a 1000W supply, and the supply tripped out so they added more power.  For a single 3090, I'm guessing 650 W or more is the mininum. 

I was looking at the Gigabyte blower version of the 3090 but its $2499 on Amazon which is a $1000 markup over the retail price from NVidia. No way! 

BTW, I'm running a full size (3 slot wide) EVGA XC Ultra 2080 Ti in my T7910.  Works great. Would go with the turbo version if i needed Thunderbolt.  But the point is, the big card fits into the chassis (in only one location, the blue PCI-E 3 x16 slot).  No problems with clearance - the cover fits on very easily.

Thanks a lot for this great answer ! 

Hi,

For the record and the other people that might want to give it a try...
It does work!
I've had the opportunity to test both the Gigabyte and Asus version of the Turbo 3090 in the T7910 and they worked fine! They also fitted well with the pannel closed.

Hope this helps