Optiplex Desktops

[Swansy444]

I would like to upgrade the graphic card in my Dell Optiplex 7090 SFF. It has a 300Watt PSU. Currently has a AMD Radeon 540 1GB LP graphics card.

It has internal slots for PCIe Expansion

• One Half-height Gen4 PCIe x16 slot
• One Half-height Gen3 PCIe x4 slot

I understand that the safest option is to upgrade to either GeForce GT 1030 2 GB GDDR5 Low Profile (30Watt) or AMD RX640 (50Watt) as Dell recommends a maximum of 50W PCIe power draw for the SFF models.

However, I wanted to check whether the newly released AMD RX6400 low profile might also be a suitable alternative? AMD has branded this new model with a total board power rating of just 53 watts. 

[redxps630 · Accepted solution]

Re: Dell recommends a maximum of 50W PCIe power draw for the SFF models.

no worries.  that 50W max is not written in stone.  Dell SFF user has frequently installed 75W gpu such as GTX 1050Ti in 50W max slot and run the video card successfully.

you also have option to upgrade the 7090 SFF psu to one that has PCIe black connector to support more powerful gpu that needs 6 pin.  7090 SFF psu is interchangeable with 7080/7090 tower psu in form factor and motherboard connectors which all have the white 6+4+4 pin connectors for motherboard.  the Dell config does not have the high power psu for SFF is just Dell's way of limiting SFF.  does not mean user cannot.

Tower:
260 W typical 85% Efficient PSU, 80 Plus Bronze
300 W typical 92% Efficient PSU, 80 Plus Platinum
360 W typical 92% Efficient PSU, 80 Plus Platinum
500 W typical 92% Efficient PSU, 80 Plus Platinum
Small Form Factor:
300 W typical 92% Efficient PSU, 80 Plus Platinum
200 W typical 85% Efficient PSU, 80 Plus Bronze
 

[bradthetechnut]

300w PSU is more than sufficient to run 75w GPU.

Also:  Optiplex 7090 Spec Sheet 

[Swansy444]

Thanks for your help. What about

• AMD Raedon RX6400 4GB LP (only 53watts)

Do you think this fits or is suitable too?

[redxps630]

Power of 50w card is no problem.  There are quite a few user validated examples of 50W RX-640 in 7090.

https://www.userbenchmark.com/PCBuilder?searchTerm=Optiplex%207090%20RX-640

RX-6400 is quite new.  There is no user validated example yet.  

[sam55todd]

I've Nvidia T1000 running there for more than 6 months and had no issues.
Would gladly install Nvidia A2000 but it won't fit because of double-slot heatsink design (although it's possible to change it for customized single-slot radiator)