[SOLVED] Will AMD RX 550 4GB Work With 250 Watt PSU?

[Appletax]

Solution: probably, but 250 watts is very low power for this so therefore is not recommended.


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I have a new AMD RX 550 4GB PowerCooler Red Dragon GPU.

Does not require PCIe power cable - runs off the 75 watts that the PCIe 3.0 bus provides.

Says it needs min. 400 watt PSU.

I have it installed in a system that has a 270 watt PSU with dual-core Intel Core i3. Works just fine.

Can I pull it out and put it in a system that has a 250 watt PSU?

The system with 250w PSU has a fried EVGA 730 2GB GPU that requires a min. 300 watt PSU and min. 20 amps on the +12 rail

The PSU's +12V rail is 17 amps.

WTF? --- the 250w, +12V1 17a PSU that came from the manufacturer with a GT 730 does not meet the power requirements of the GPU.


PSU Calculator Results for New AMD RX 550:

Load Wattage: 234 W

Recommended PSU Wattage: 284 W

PSU Calculator Results for Dead Nvidia GT 730:

Load Wattage: 217 W

Recommended PSU Wattage: 267 W

 

[Porthos]

Says it needs min. 400 watt PSU.

Best to follow the spec requirements.

The system with 250w PSU has a fried EVGA 730 2GB GPU that requires a min. 300 watt PSU and min. 20 amps on the +12 rail (250w PSU +12v rail = 17 amps).

Good reason to follow recommendations.

 

[Appletax]

Customer is gonna stick with replacing her dead GT 730 with a new GT 730

Don't wanna put an extra burden on her little PSU lol.

 

[Porthos]

Don't wanna put an extra burden on her little PSU lol.

Let me guess, I small form factor machine with an odd PSU connector. And no larger PSU's that are easy to find or fit.

 

[Diggs]

The 1050 Ti runs just on the PCI bus (<70 watts), has much better performance and is available in low-profile if needed. We've run them on 240 watt PSUs for years in Dell Optiplex SFFs.

 

[Appletax]

The PSU is regular ATX size. Little PSU meant little in wattage.

I looked up a 1050 Ti and it requires a 300 watt PSU - a whole 100 watts less than my AMD RX 550.

 

[Blues]

You can just send that 550 my way now that you don't need it GPU prices are still insane to me I remember buying my RX 580 for ~$170 now that card is at least $400 last I looked.

 

[MudRock]

The biggest problems with going with what the calculators tell you, is they really don't tell you if the rails can handle it. Other challenge with a board-driven video card, is that they tend to draw the max the board can deliver; RX 550 is 75W/Mobo rated at 75W, maxed out.

I am assuming that the 400W recommended is based on the concept that most 400W would have the 12V rail for Mobo high enough to deliver the 75W.

I'm cheap. I tend to run cheaper PSUs, but I've learned that usually those 400W recommended is usually there for a good reason. You could do the math and figure out if smaller PSU would work.

 

[Appletax]

You can just send that 550 my way now that you don't need it GPU prices are still insane to me I remember buying my RX 580 for ~$170 now that card is at least $400 last I looked.

Hehehe Send money and it is yours lol. Or, I can deliver it to you in Tennessee - let me couch surf at your place - nice vacation for me haha. Would love to visit Nashville again. Been wanting to see a show at the Grand Ole Opry.

 

[NETWizz]

Yes, sure. I mean, you can plug it all in and push the power button and cross your fingers; I guess.

Personally, I would sell the customer another power supply or not take the job, but it might work okay.

 

[Appletax]

Yes, sure. I mean, you can plug it all in and push the power button and cross your fingers; I guess.

Personally, I would sell the customer another power supply or not take the job, but it might work okay.

Will be replacing GPU with same GPU that the PC came stock with. No need to upgrade PSU. Worked just fine for them for 4 years for gaming so it must be OK.

Would upgrade PSU if she went with the more powerful RX 550 4GB.