HD7870 Crossfire PSU

[aquiesse]

HI guys.

I am currently running a HD7870 GPU. Just seen the exact same card on sale for £100.00 GBP. Will my PSU be sufficient? Currenlty running a HX650 but have seem some forum's that say 600W will be fine and others that recommend 750W. Any advice would be appreciated.

[The Crazed Child]

What else are you running in your system? It's definitely possible to run 2x 7870's off a 650w unit, but you'd be getting close to overloading it if the rest of your components consume a lot of power. 

[aquiesse]

Athlon Xii 760k overclocked to 4.3Ghz, 16GB 1600mhx Ram, 128GB SSD, 2TB mass storage, Corsair H100, 5x 120mm fams (2 on the H100), Obviously the existing 7870, Wireless Network card (please dont judge). Thats pretty much it.

[dragoon20005]

650 watts will be the minimum to run dual 7870s

 

 

but it will be much better option of selling your GPU and getting a single 290

[alby800]

What else are you running in your system? It's definitely possible to run 2x 7870's off a 650w unit, but you'd be getting close to overloading it if the rest of your components consume a lot of power. 

 

Athlon Xii 760k overclocked to 4.3Ghz, 16GB 1600mhx Ram, 128GB SSD, 2TB mass storage, Corsair H100, 5x 120mm fams (2 on the H100), Obviously the existing 7870, Wireless Network card (please dont judge). Thats pretty much it.

you need to quote or @aquiesse for him to get a notification

[Jack.EXE]

650W is plenty, especially since linus ran a 780 and a quadro in edzel's rig on 550W.

 

And to all the people telling him to sell his card and get a 290, screw off. dual 7870s is just as good, cheaper, and runs much cooler. (yes, I'm talking to you @dragoon20005)

 

plus, he asked about dual 7870 psus, not 290 psus

[Aniallation]

Athlon Xii 760k overclocked to 4.3Ghz, 16GB 1600mhx Ram, 128GB SSD, 2TB mass storage, Corsair H100, 5x 120mm fams (2 on the H100), Obviously the existing 7870, Wireless Network card (please dont judge). Thats pretty much it.

The HX PSUs are actually quite solid. 650W will do perfectly fine in your PC with another 7870.

[Jack.EXE]

Athlon Xii 760k overclocked to 4.3Ghz, 16GB 1600mhx Ram, 128GB SSD, 2TB mass storage, Corsair H100, 5x 120mm fams (2 on the H100), Obviously the existing 7870, Wireless Network card (please dont judge). Thats pretty much it.

 

No judgement here, I'm rocking a rosewill RNX.

[Aniallation]

650W is plenty, especially since linus ran a 780 and a quadro in edzel's rig on 550W.

 

And to all the people telling him to sell his card and get a 290, screw off. dual 7870s is just as good, cheaper, and runs much cooler.

 

plus, he asked about dual 7870 psus, not 290 psus

Agreed. Everyone says when getting new PC that you can crossfire in the future if one card is not enough. Then when someone asks about crossfire it's always get rid of the old card and get one new more powerful one bruh

 

Like seriously, people need to get stuff straight. Two 7870s (R9 270) will do just as well as a 290 if not better at 1080P. Crossfire is not the end of the world. It may use more power, but that's about it nowadays. Cards have good coolers, PSUs are adequate, and games are much better optimized. It's a lot cheaper and easier way to CF then to run one more powerful card if you already have one of the two cards.

[Aniallation]

Just seen the exact same card on sale for £100.00 GBP. 

Is it a brand new card or a used card? Cause theres new R9 270s (which can crossfire with 7870 non-GHz) for 120 GBP

[dragoon20005]

well i do know the dual HD7870 will be great for 1080P gaming and it faster than the 280X and close to the 290

 

it only when you want to push higher res 

 

and you hit the 2GB VRAM wall

 

 

I build system like this and it sucks the HD7870 cant play 1440P

[aquiesse]

Thanks guys for the help, think i'll go for it and @dragoon20005 I'd love a 290 but its a budget thing. Already gonna have to stealth this past the wife and hope she doenst notice but its on the list for the future.

[dragoon20005]

Thanks guys for the help, think i'll go for it and @dragoon20005 I'd love a 290 but its a budget thing. Already gonna have to stealth this past the wife and hope she doenst notice but its on the list for the future.

yea understand mate

[aquiesse]

Is it a brand new card or a used card? Cause theres new R9 270s (which can crossfire with 7870 non-GHz) for 120 GBP

Oh yeah its brand new boxed from a retail store, forgot that bit.

[iruixos]

I had no issues with my old 7870 xfire config and OC'd CPU with an 850W PSU from Corsair (the HX series).

 

(I've sold them now in favour of a single R9 290)