RX VEGA 64 Crossfire

[BobbyBigPlays]

I have a 800w 80plus standard PSU can i get away with crossfiring it with 2 vega 64 air cooled cards

[[wan-clan.org] Gordy Freeman]

Should be able to.

[BobbyBigPlays]

I am a little worried because both card will have exceed more than 800 W and that means I have to replace the 800 W PSu

[Zekiran]

You need to have a PSU that can tolerate well more than your hardware adds up to, so yes you should be getting a bigger one if you intend to do this. It's ALWAYS better to have more and not need it, than wind up with fried components when your system fails.

[BobbyBigPlays]

should i just get the liquid cooling edition for the vega 64 with the 800 PSU

[tacoshy]

the liquid cooling wont cosume less wattage and the wattage draw of a Vega 64 is insane.

[Omega]

800w is enough for Crossfire Vega 64's.

[BobbyBigPlays]

ahhh so crossfire will work

[Big Boom Boom]

Diposting pertama kali oleh Omega:

800w is enough for Crossfire Vega 64's.

Just don't forget an i9-7980XE thrown in for good measure as space heater!

Probably won't be enough to Crossfire AND overclock +50% PL on the Vega 64.

[Rumpelcrutchskin]

Maybe if you dont overclock the cards and CPU but either way it would be cutting it kinda close.
It's 295W card without overclocking. I wouldnt touch it without 1000W good quality PSU and 800W is usually not sign of good quality, most good brands use 750 and 850 not more obscure 800.

[AbedsBrother]

Realhardtechx recommends an 1100W PSU for Crossfired Vega 64 gpus.
http://www.realhardtechx.com/index_archivos/Page362.htm

[Omega]

Diposting pertama kali oleh AbedsBrother:

Realhardtechx recommends an 1100W PSU for Crossfired Vega 64 gpus.
http://www.realhardtechx.com/index_archivos/Page362.htm

And so does AMD, but that is a bit overkill. They are simply compensating for low quality PSUs I think.

[AbedsBrother]

Diposting pertama kali oleh Omega:

Diposting pertama kali oleh AbedsBrother:

Realhardtechx recommends an 1100W PSU for Crossfired Vega 64 gpus.
http://www.realhardtechx.com/index_archivos/Page362.htm

And so does AMD, but that is a bit overkill. They are simply compensating for low quality PSUs I think.

Better safe than sorry in this case.
If OP puts both Vega 64's on their power-saving mode, it might work. But if he's already spending $1200+ on a pair of Vega 64 gpus, why not spend some more and get a power supply with the recommended wattage? Get a pair of Vega 56's, you'll lose around 10% performance from the 64, but recommended wattage for Crossfired Vega 56's is 850W. That's a much smaller risk.

OP what is the make and model of your power supply?

[Monk]

Do you have the cards yet ?
If not, don't buy them, the Vega 64 is a really bad deal at full price.
And 2 of them, I'd want a 1000w PSU to be on the safe side as they can easily pull over 300w each, but you would be much better off with a single 1080ti.
This is from someone who has sli 1080ti, but is currently using a Vega 64 as the Ti's have waterblocks on them waiting for a new build to be finished.
If you do really want to go with Vega 64, and in xfire. I'd make sure you allow the funds to watercool them both, as they run hot or very loud at stock before you even look at overclocking them.

[BobbyBigPlays]

I got a vega 64 for 550, thinking of getting another one because i have a 27 curved 4k monitor with free sync. The only reason im going with Radeon. And im thinking of undervolting the cards, Cuz i keep hearing good news of it undervolting than overclocking

[Monk]

Still a bit much really, I got lucky and got mine at the 450 launch price.

But if you have it, you know how hot and loud they run, add in xfire and I'd say you almost need watercooling just so you can hear yourself think, but then there's the fact that xfire support is worse than sli, and sli isn't exactly outstanding currently.

I would check carefully if the games you are interested in have support or not for xfire.
Also, what it's the rest of your system like, including what Res you are playing at?

Xfire makes even less sense than sli.