I took a reading from killowatt meter and playing crysis 3 the total load was 281 that seems kinda low for FX-6300 95 watt and Sapphire Vapor-X Gigagertz Edition HD 7970. I have Corsair CX500 500 watt power supply. is this adequate becuase the box recommends a 750 for that card. i thought you could crossfire two 7970 with 750 watt. i think 600-650 would give me some head room. what do you think? and what do you suggest i want a something modular.
Load Wattage on Power Supply
- Thread starter brpeden82
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Dark Lord of Tech
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Dark Lord of Tech
Retired Moderator
- Aug 18, 2009
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http://www.newegg.com/Product/Product.aspx?Item=N82E16817207022
XFX 650 by Seasonic ^ Modular w \ Headroom
XFX 650 by Seasonic ^ Modular w \ Headroom
TenPc
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- Jul 11, 2012
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A 500 watt PSU is the total peak power for all the rails combined (and then some), the 12v rail is only 408 watts (cx500 V2), that is what the video card is using as well as all your other hardware. You'd better go by what is recommended, usually I suggest 40% on top of the recommendation because how would GPU manufacturers know what else you have in the PC? Their estimates are based loosely on standard components and hardware.
If you acquire an EPS PSU, they deliver a higher 12v rail watts, Corsair are the best budget PSU and offer the EPS certification
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006
The Sapphire Vapor-X Gigagertz Edition HD 7970 offers either a 3gb edition or a 6gb edition. The 6gb vram would possibly be the one to require 750 watt PSU whereas the 3gb edition would probably be only about 550 watt PSU. I'm searching for the exact specs, I'll get back to you.
Edit - I wasn't far wrong about the 3gb edition -
http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&pid=1634&psn=&lid=1&leg=0#
■500 Watt Power Supply is required
Well, I was wrong about the 6gb edition -
http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&pid=1497&psn=&lid=1&leg=0
It also requires only a 500 watt PSU.
If you add my 40% that equals a 700 watt PSU, you'd probably be safer with it. Also depends on your ram, how many hdd's and whether you have other components as well.
If you acquire an EPS PSU, they deliver a higher 12v rail watts, Corsair are the best budget PSU and offer the EPS certification
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006
The Sapphire Vapor-X Gigagertz Edition HD 7970 offers either a 3gb edition or a 6gb edition. The 6gb vram would possibly be the one to require 750 watt PSU whereas the 3gb edition would probably be only about 550 watt PSU. I'm searching for the exact specs, I'll get back to you.
Edit - I wasn't far wrong about the 3gb edition -
http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&pid=1634&psn=&lid=1&leg=0#
■500 Watt Power Supply is required
Well, I was wrong about the 6gb edition -
http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&pid=1497&psn=&lid=1&leg=0
It also requires only a 500 watt PSU.
If you add my 40% that equals a 700 watt PSU, you'd probably be safer with it. Also depends on your ram, how many hdd's and whether you have other components as well.
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