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Will my PSU do 2 GTX780's alongside my 3820/3930k?

post #1 of 5
Thread Starter 
I recently bought a Cooler master V700 to replace my aging and noisy XFX XXX 650w.
I never thought I'd consider running SLI/CF as I had very bad experiences with framedrops / input lag / frametimes and microstutter.

Now however those issues have been reasonably fixed and I saw the news of a GTX780 Ti hitting the shelfs soon.

Now, I got a single reference GTX780 @ 1.212v 1215Mhz core and 7000Mhz VRAM and when everyone starts to ditch their 780's secondhand to score a Ti (which WILL happen, trust me tongue.gif) I wanna get a second one.

However, I seriously doubt my poor 700w V700 si capable of running 2 GTX780's @ 1212v combined with a 3820 @ 4.875Ghz 1.480v or by then even a 3930K/3960X @ ~5Ghz...

I know the V700's are amazing PSU's of amazing build quality (Seasonic KM3 FTW) but how much can it really handle.. tongue.gif
Thundahcat.
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Maxtor 80GB IDE Cooler Master alu/copper block with a Slipstrea... Windows 98 SE Windows XP Pro SP3 
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Thundahcat.
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Maxtor 80GB IDE Cooler Master alu/copper block with a Slipstrea... Windows 98 SE Windows XP Pro SP3 
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Cooler Master Real Power M520W OEM with great airflow and even cable management 
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post #2 of 5
You only need more wattage if you are going to overvolt those GTX 780´s
Seravee
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Seravee
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post #3 of 5
Thread Starter 
Well, they are on the max that a non-hacked MSI AB + BIOS allows, 1.212v, which is 38mV more then stock. I ran it as high as 1.300v but the gain in clockspeed aint that big and they get VERY hot with reference cooling above 1.22v so..

At most they'll both run 1.212v with a 340w power limit adjusted BIOS. Now, i am yet to see my card hit 70% of that 340w, even on 1.300v 1280Mhz so that'll be about 225w per card.
And this CPU I got now goes at ~150w in full stresstests, ~100w in-game so it should indeed be possible....
Thundahcat.
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Hard DriveCoolingOSOS
Maxtor 80GB IDE Cooler Master alu/copper block with a Slipstrea... Windows 98 SE Windows XP Pro SP3 
PowerCase
Cooler Master Real Power M520W OEM with great airflow and even cable management 
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Thundahcat.
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AMD Athlon XP-M Barton @ 2612Mhz ASUS A7N8X-X HIS Radeon X800XL 256MB w/ V-MOD @ 585Mhz GPU 5... 3x512MB Samsung PC-3200 CL3 
Hard DriveCoolingOSOS
Maxtor 80GB IDE Cooler Master alu/copper block with a Slipstrea... Windows 98 SE Windows XP Pro SP3 
PowerCase
Cooler Master Real Power M520W OEM with great airflow and even cable management 
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post #4 of 5
This won't work out with a couple of 780s and a 3820 running that high voltage on a V700. You'll get shut downs with overvoltage on 780s and a 3820/3930k.

Stick to one card or upgrade that psu(more wattage) if you decide to get two. 780s and SB-Es are power hogs when the voltage is applied.
post #5 of 5
the 780's at stock or slightly overclocked should be fine, considering i'm using the 3930k at 1.3V 4.5Ghz and xfire 7950's 1100/1500 the power draw should be similar.
xps 17
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xps 17
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350D
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Hard DriveOSMonitorKeyboard
kingston snv425 64GB~500GB 7200rpm 7 home prem. 17" 1600*900 eluminated default 
Mouse
orochi 
CPUMotherboardGraphicsGraphics
Intel I7 4930K RAMPAGE IV GENE AMD Radeon R9 290x AMD Radeon R9 290x 
RAMHard DriveCoolingCooling
G.skill ripjawsz samsung 850 evo ek dazmode canadian block HEATKILLER GPU-X³ R9 290X "Acrylic Edition" Ful... 
CoolingOSMonitorPower
HEATKILLER GPU-X³ R9 290X "Acrylic Edition" Ful... windows 10 benq xl2730z evga 1000P 
CaseAudio
thermaltake core P5 Audioengine D1 
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