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GTX 770 on 520W PSU - Page 2

post #11 of 13
Your PSU can do 20A on the 12V rails, and has two of them. each rail can do 12V x 20A = 240Watts.

Your CPU isn't gonna use anywhere near 240W, and the GTX 770 uses 230W according to Nvidia specs - http://www.geforce.co.uk/hardware/desktop-gpus/geforce-gtx-770/specifications

Taking an extreme example -

i5 CPU ~ 140w Max
Motherboard ~ 40W Max
Ram ~ 6W Max
3 x HDDs - say 15W a drive = 45W (and thats an over estimate)

CPU/Case fans - 12W (overestimating again)

chuck in an extra 5W for accessories keyboard mouse, thumb drives and any other USB stuff that draws power (and again its overestimating.)

= 140w + 40w + 6w + 45w + 12w + 5w = 248W

And thats with EVERYTHING at full load overestimated. Real world you'll be lucky to top 180W I would think.

so 248W + absolute top draw of 230W from a GTX 770 = 478W - and remember that's EVERYTHING full load - even benchmarking you'll not reach that.

I doubt an i5 could even draw 140W - thats me overestimating.

On top of that, the seasonic is a decent make - so it's gonna eat any overload thrown at it, which is going to be rare extreme spikes in power.

all I would say, is when setting up the power - try and get your CPU and everything else on the 12V1, and have the GPU exclusive on the 12V2. Its no biggie if you have some low lower stuff on the 12V2, but try and keep your HDDs on the 12V1 if possible.

EDIT - actuallly, scrub that last sentence - its a single rail unit - it doesn't have multi-rail protection. Found at the bottom of this page - http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=185
Edited by latelesley - 6/19/13 at 10:54pm
post #12 of 13
dual 20V should be ok for normal gaming...

im running one with dual 18A, but I crash during furmark
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post #13 of 13
Thks all for reply,I am very exited today will have new MSI GTX 770 TF
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Core i5 3570K @4,6 GHz Biostar Z77 his iceQ R9 390 MSI Gaming GTX 770 
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Power Logic HD 4850 his 5850 ddr5 Team extreme vulcan WD Black 500GB 
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intel SSD 520 120G WD Black 1.5T Optiarc DVD RW Stock 
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Win 7 Ulitimate SP1 64bit Samsung 22" Full HD Logitec Corsair CM 750 80+ 
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cooler master 951 Razer death ader 2013 razer goliath speed razer goliath speed 
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Altec Lansing Z506 asus xonar dx asus xonar dx 
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631 3GHz HT GA 945PL-s3 7600GT CorsairVS 2x512DDR 5300@667 
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Walkers
(23 items)
 
My Old CPU
(13 items)
 
 
CPUMotherboardGraphicsGraphics
Core i5 3570K @4,6 GHz Biostar Z77 his iceQ R9 390 MSI Gaming GTX 770 
GraphicsGraphicsRAMHard Drive
Power Logic HD 4850 his 5850 ddr5 Team extreme vulcan WD Black 500GB 
Hard DriveHard DriveOptical DriveCooling
intel SSD 520 120G WD Black 1.5T Optiarc DVD RW Stock 
OSMonitorKeyboardPower
Win 7 Ulitimate SP1 64bit Samsung 22" Full HD Logitec Corsair CM 750 80+ 
CaseMouseMouse PadMouse Pad
cooler master 951 Razer death ader 2013 razer goliath speed razer goliath speed 
AudioAudioAudio
Altec Lansing Z506 asus xonar dx asus xonar dx 
CPUMotherboardGraphicsRAM
631 3GHz HT GA 945PL-s3 7600GT CorsairVS 2x512DDR 5300@667 
Hard DriveOptical DrivePower
Seagate 200GB+40GB SAMSUNG DVD-ROM+SAMSUNG CD-RW ENLIGHT 320 WATT + THERMALTAKE 420 WATT 
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