Sign in with
Sign up | Sign in
Your question

620W PSU enough for 6870 Xfire & 2500k OC?

Last response: in Systems
Share
March 17, 2012 2:22:49 PM

Heyhey,

I plan to build a new gaming rig come Ivybridge and gtx600 time. I'm hoping to upgrade my current pc so my brother can game with me :D  Parts I will be keeping are: CM Case, 6870, DVD burner, and hopefully the Corsair hx 620W PSU.

I want to upgrade the PC to an OC'd 2500k and 2x6870 in Xfire so he can play bf3, Diablo 3, SC2, SWTOR etc etc.

Will a 620W PSU run the 6870 Xfire and OC'd 2500k ?
a b B Homebuilt system
March 17, 2012 2:30:51 PM

HX650 you mean? That should be plenty.
m
0
l
March 17, 2012 2:39:36 PM

Advertised TDP = 150W
System in IDLE = 173W
System Wattage with GPU in FULL Stress = 295W
Difference (GPU load) = 122 W
Add average IDLE wattage ~ 19W
Subjective measured GPU power consumption = ~ 141 Watts

this is based on the power hungry x58 chipset. its also with one card. it could handle a 2nd card on your psu. so could you.
m
0
l
Related resources
a b B Homebuilt system
March 17, 2012 3:24:05 PM

According to this: http://extreme.outervision.com/PSUEngine your system would require about 540 watts so it should be able to handle it. Just be careful to make sure that your power supply has enough juice on each of the its rails to handle the load.

Also, each of those 6870's has two 6 pin Power sockets so for two of them you will need four 6 pin GPU power cables coming out of your PSU.
m
0
l
a b B Homebuilt system
March 17, 2012 4:39:30 PM

Whomastadon said:
Heyhey,

I plan to build a new gaming rig come Ivybridge and gtx600 time. I'm hoping to upgrade my current pc so my brother can game with me :D  Parts I will be keeping are: CM Case, 6870, DVD burner, and hopefully the Corsair hx 620W PSU.

I want to upgrade the PC to an OC'd 2500k and 2x6870 in Xfire so he can play bf3, Diablo 3, SC2, SWTOR etc etc.

Will a 620W PSU run the 6870 Xfire and OC'd 2500k ?


http://www.anandtech.com/show/3987/amds-radeon-6870-685...
Shows a system using an i7-920 (about 50W more power hungry on load than the i5-2500K) and two stock 6870s drawing 481W at the wall under Furmark. 10-20% can be taken off this number to get an idea of what a system with two 6870s will use. Which is about ~450W, so I think the Corsair HX 620 will easily handle it.

Zero_ said:
HX650 you mean? That should be plenty.

He could mean that, but there is such a unit as the Corsair HX 620W.

neon neophyte said:
Advertised TDP = 150W
System in IDLE = 173W
System Wattage with GPU in FULL Stress = 295W
Difference (GPU load) = 122 W
Add average IDLE wattage ~ 19W
Subjective measured GPU power consumption = ~ 141 Watts

this is based on the power hungry x58 chipset. its also with one card. it could handle a 2nd card on your psu. so could you.

Guru3D will have done a 6870 Crossfire review as well. I expect they recommend a good 750W PSU for a system with two 6870s, but the numbers don't necessarily support that IMO. I also think Guru3D just add 50W to whatever AMD/Nvidia's power supply recommendation is.
m
0
l
September 6, 2012 10:51:23 AM

I have the same set-up but my 620w psu has only 2 6pin sockets!!!! Can I get away with using a splitter? Dont hit me! *cowers down* :) 
m
0
l
!