Upgrading my gpu, need some answers about the power supply

[relox]

Hi, well the topic is about i want to upgrade my gpu component right now i have a gtx 560 ti installed on a mother board gigabyte z68xp-ud4 and the power supply is coolmaster power plus 600 watts , then my mother board says 2x copper pcb on the component, so my question is i want to add an NVIDIA gtx 570 to my system ¿do i have to change my power supply to what kind of watts? or ¿can i leave that power supply 600 watts and use it the GTX 560 TI and GTX 570 both cards installed? and if that kind of mother board can handle with two GTX cards?, im considder to use the GTX 560TI to the primary system with the rest of memory use it with octane and the GTX570 for full rendering and combine the cuda cores. thats my situation i know there are the gtx 580 and gtx 590 but my object is that for now, answers will be apreciated alot im really confused the requirements of watts about cards thanks

[t_3]

Hi, well the topic is about i want to upgrade my gpu component right now i have a gtx 560 ti installed on a mother board gigabyte z68xp-ud4 and the power supply is coolmaster power plus 600 watts , then my mother board says 2x copper pcb on the component, so my question is i want to add an NVIDIA gtx 570 to my system ¿do i have to change my power supply to what kind of watts? or ¿can i leave that power supply 600 watts and use it the GTX 560 TI and GTX 570 both cards installed? and if that kind of mother board can handle with two GTX cards?, im considder to use the GTX 560TI to the primary system with the rest of memory use it with octane and the GTX570 for full rendering and combine the cuda cores. thats my situation i know there are the gtx 580 and gtx 590 but my object is that for now, answers will be apreciated alot im really confused the requirements of watts about cards thanks

those two cards need as much as 400 watts together; adding another 150 watts for the other components, and the rule, to have at least 25% headroom, you'l most probably get into troubles using this 600w power supply. also you need to take care about the amount of independent 12v rails that the psu supplies (the more the better); a save bet would be 800 watts psu with four 12v rails, giving also a little headroom for upgrades.

if your board has 2 pcie x16 slots, than it should handle both cards; afaik it doesn't need to be "sli ready", because octane doesn't use sli anyway; but octane can't share vram between cards. if you use both cards for rendering, the least available amount of vram sets the limit. if you use one card for the system, and one for octane, you can use of course all the vram that one card has...

[relox]

thanks!!!! alot t_3, you gave to the point that I wanted to know this thread can be closed.

[gabrielefx]

with a 1500 psu you can power up 4 GTX580 at full load, 24gb, 1 processor 3.33 (probably 2 Xeons), motherboard, 2 ssd hard disk, 1 bluray

[relox]

if i have some money, i will buy a workstation with 4 gtx 580 but its not my time right know maybe if i find a job quick , i already installed the gtx 570 on my machine really fast since i see the difference between 360 cuda cores to 480 now i can render my scene in an hour deppending on the size of the image, i will try to sell the gtx 560 ti and buy a gtx 590