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Would this PSU work for a 6870 crossfire?

post #1 of 11
Thread Starter 
I need some expert opinion / 2nd opinion on whether my current PSU would support my expansion plans. I'm planning on a crossfire with adding another 6870 to my sig rig - Dream Build 2011 - The Phantom!

Apart from what is listed on the signature I have 3 more DVD Combo drives on that! I also do OC the machine to 4.4 Ghz at 1.312 V. The question is whether my SeaSonic X Series X650 Gold Modular PSU (this is a single rail 54A (+12V) PSU which I love) support the extra 6870 and run smoothly!

eXtreme PSU Calculator shows me these:

Without OC:

480

With OC:

480

This is very positive as I have 650W and 54A to work with. But what do you guys think? Would the Seasonic have enough juice to support this setup?

All opinions and advice is appreciated!

Thanks!
 
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post #2 of 11
I'm pretty certain you'll be fine.
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post #3 of 11
It should be good thumb.gif
 
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post #4 of 11
yea you'll be good, nothing to be concerned with stock 6870 crossfire does about 450 total system power draw, so 500w power draw avg in a overclock state 550 mostly biggrin.gif you'll hit just below 85% PSU load smile.gif
Edited by JunkoXan - 1/31/12 at 1:21pm
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post #5 of 11
If your want the X series gold from Seasonic, then get the 750W version.
Why? Well that one has free shipping, the 650W is $11.30. The cost difference of the 650w to 750w is $20

So for $8.70 more you get a 750W.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151087
    
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post #6 of 11
It'd handle another 6870 just fine, that calculator is over-estimating what you're actually going to draw.
Check out Phaedrus' calculator (here) if you want to use one, it will be more accurate.
Edited by candy_van - 1/31/12 at 1:23pm
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post #7 of 11
Thread Starter 
Quote:
Originally Posted by Lazloisdavrock View Post

I'm pretty certain you'll be fine.
Quote:
Originally Posted by txtrkandy View Post

It should be good thumb.gif
Quote:
Originally Posted by JunkoXan View Post

yea you'll be good, nothing to be concerned with stock 6870 crossfire does about 450 total system power draw, so 500w power draw avg in a overclock state 550 mostly biggrin.gif

Thank you guys for the quick response! So just plug in the new card and crossfire! How about if I OC the GPU as well, would that affect the power draw?
Quote:
Originally Posted by Sp33d Junki3 View Post

If your want the X series gold from Seasonic, then get the 750W version.
Why? Well that one has free shipping, the 650W is $11.30. The cost difference of the 650w to 750w is $20
So for $8.70 more you get a 750W.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151087

My build is already done, and I'm trying to avoid buying/investing more if the current one works, so I am trying to avoid exactly what you are suggesting - getting a new PSU!

I got the 650W on a shell shocker deal for $99.99 + free shipping - thumb.gif
 
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post #8 of 11
Thread Starter 
Quote:
Originally Posted by candy_van View Post

It'd handle another 6870 just fine, that calculator is over-estimating what you're actually going to draw.
Check out Phaedrus' calculator (here) if you want to use one, it will be more accurate.

Thanks CandyVan will try that calc!
 
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post #9 of 11
i updated my post and you'll beable to OC both cards on the power supply no problem even beable to keep the CPU overclocked
Quote:
Originally Posted by Dad2David View Post

I got the 650W on a shell shocker deal for $99.99 + free shipping - thumb.gif

i picked up a 750w Antec for 85 with free shipping biggrin.gif

My Power Supply i have laying around
Edited by JunkoXan - 1/31/12 at 1:28pm
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JunkoXan's Build
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Samsung F3 Spinpoint Cooler Masters 616+ Windows 7 Upstar 20" 1080p TV 
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post #10 of 11
If you already have it, then your fine. Under normal gaming you wont see anything past 450w.
If your going to benchmark both cpu and GPU at the same time, you might see 600w. Unless you have a PSU tester or UPS to show how much watts is being pulled from the PSU.
    
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Audiotrak Prodigy Cube DAC Edifier S330D 2.1 Speaker Bose AE2 Headphone Superlux 668B Headphone 
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Logitech UE 4000 Headphone Sennheiser PC320 Headset MX-4 Thermal Paste (CPU/GPU) 3x 140mm Noctua NF-P14s Redux 1200rpm PWM 
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CPUMotherboardGraphicsRAM
Intel 3770k @ 4.2Ghz Asus Z77 Sabertooth EVGA GTX1060 3GB Crucial Ballistix Tactical 16GB BLT2K8G3D1608ET... 
Hard DriveHard DriveHard DriveHard Drive
Crucial MX100 512GB Corsair Force 115GB WD Green 1TB WD Green 2TB 
CoolingOSMonitorKeyboard
Cryorig C1 + XT140 Win7 64 Home SP1 ASUS VE278Q CM Storm Trigger Brown Switch 
PowerCaseMouseMouse Pad
Corsair AX650 NZXT S340 Logitech G500 Razer Goliathus Extended Mouse Pad - Speed 
AudioAudioAudioAudio
Audiotrak Prodigy Cube DAC Edifier S330D 2.1 Speaker Bose AE2 Headphone Superlux 668B Headphone 
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Logitech UE 4000 Headphone Sennheiser PC320 Headset MX-4 Thermal Paste (CPU/GPU) 3x 140mm Noctua NF-P14s Redux 1200rpm PWM 
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