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CYB3RBYTE

macrumors 6502
Original poster
Sep 2, 2014
454
293
Midwest
Hi all,

I have a lead on a cheap RX480, a reference card by XFX with 4GB of VRAM. I’d be using it in my 4,1 cMP. I had heard from the grapevine that the XFX cards can have issues with macOS compatibility. Has anyone here experienced that?

Just looking for a not terribly expensive upgrade from my GTX 680, and RX580’s are way too expensive for what they are worth at the moment.
 

tsialex

Contributor
Jun 13, 2016
13,455
13,601
Hi all,

I have a lead on a cheap RX480, a reference card by XFX with 4GB of VRAM. I’d be using it in my 4,1 cMP. I had heard from the grapevine that the XFX cards can have issues with macOS compatibility. Has anyone here experienced that?

Just looking for a not terribly expensive upgrade from my GTX 680, and RX580’s are way too expensive for what they are worth at the moment.
AMD RX 480 reference cards with just one PCIe 6-pin connector are extremely problematic, lot's of people burned the PCIe slot with the excessive power draw. I'd wait for a different card.

XFX cards that have the reference firmware are not a problem, but the highly tweaked/customised cards that XFX usually sell are a no-go with Mac Pros. Most XFX R9-380s don't even boot macOS.
 

krakman

macrumors 6502
Dec 3, 2009
451
511
AMD RX 480 reference cards with just one PCIe 6-pin connector are extremely problematic, lot's of people burned the PCIe slot with the excessive power draw. I'd wait for a different card.
I have installed three of these reference RX480s into my office computers, I never experienced a problem, but to be on the safe side I ended up fitting an EVGA Powerlink to each card.

The power link won't fit directly but you can use two mini 6 pin to 6 pin cables to the Powerlink and then a full size 6 pin to 6pin cable to the card.

And it all works fine with OC and Monterey
 

tsialex

Contributor
Jun 13, 2016
13,455
13,601
I have installed three of these reference RX480s into my office computers, I never experienced a problem, but to be on the safe side I ended up fitting an EVGA Powerlink to each card.

The power link won't fit directly but you can use two mini 6 pin to 6 pin cables to the Powerlink and then a full size 6 pin to 6pin cable to the card.

And it all works fine with OC and Monterey
If you don't render/hard game/run benchmarks the card never enter PowerPlay modes and the PCIe slot power draw is not enough for damaging the backplane, but for people that use the card hard enough to enter PowerPlay the chance of damaging the backplane is real since this card can draw 90W from the PCIe slot, lot's of people here have damaged it.

The first signal of damage is the PCIe x16 slot being recognized as x8 or x4.

If you want to know more of the issue, read below:


 
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