SLI plus a PhysX card, what PSU?

[TheDownyy]

I just bought two EVGA 970's and I have a 780 spare when my cards arrive and I want to know if I will be able to power the two 970's as well as 780 as my PhysX Card with a 750w? If not then I not bothered but it would be nice to use the card instead of it being sat there 😀

Thanks for you help!

Power Supply I am getting(750w) - http://www.scan.co.uk/products/750w-evga-supernova-750-g1-full-modular-80plus-gold-psu

2x GPU(970) - http://www.scan.co.uk/products/4gb-evga-gtx-970-acx-20-7010mhz-gddr5-gpu-1050mhz-boost-1178mhz-1664-cores-1x-dp-1x-dvi-d-i-1x-hdmi

My Rig:
Motherboard: MSI Gaming 7
CPU: i7 4790k 4.3Ghz(H100i Water cooler)
RAM: Corsair Vengeance 24GB RAM
GPU: 780 EVGA SC (So to be SLI 970's)
HDD/SSD: 2 SSD's(One M.2/1 Normal), 3 HDD(Two 1TB and One 3TB)

 

[austinfett]

You should probably pick up at least an 850W. At least, probably even more.

 

[ccampy]

Unless your gaming at 4k two 970s should gave more then enough power to handle physx by them selfs

 

[TheDownyy]

You should probably pick up at least an 850W. At least, probably even more.

I sumed most of my stuff up....

The 970's will use a maximum of 145w each making that 290w; My CPU will use a maximum of 85w(I believe) maybe more with overclock; then the 780 will use upto 250w(I can almost guarantee that it wont use that much at all for PhysX). If you add them all up then you get...(pulling my calculator out)... 625w.

I haven't added the HDD's because I don't know that they take but that's kinda why I'm asking this question. I was told that the Bronze, Silver, Gold or platinum are the only guarantee's the Manufacturer can produces meaning, If I had 750w at 80 Gold that means it guarantees 80% usage. Is this right?

 

[TheDownyy]

Unless your gaming at 4k two 970s should gave more then enough power to handle physx by them selfs

I realise this but I want to guarantee a 60FPS mark without the chance of FPS drops and the third card might help with that t however like I said I'm not really bothered if it doesn't. If I can use it then I want too...without spending more money.

 

[austinfett]

You should probably pick up at least an 850W. At least, probably even more.

I sumed most of my stuff up....

The 970's will use a maximum of 145w each making that 290w; My CPU will use a maximum of 85w(I believe) maybe more with overclock; then the 780 will use upto 250w(I can almost guarantee that it wont use that much at all for PhysX). If you add them all up then you get...(pulling my calculator out)... 625w.

I haven't added the HDD's because I don't know that they take but that's kinda why I'm asking this question. I was told that the Bronze, Silver, Gold or platinum are the only guarantee's the Manufacturer can produces meaning, If I had 750w at 80 Gold that means it guarantees 80% usage. Is this right?

Yeah but you have two SSD's (might want to look into it and see if the 4790k will not bottleneck the 3 cards plus the m.2 SSD with it's small 16 PCI lanes) and 3 HDDs. Plus I'm assuming you're gonna OC. I just like the headroom and it gives a PSU that you can keep longer. It's probably a better idea to go with more power just in case. Want to upgrade? No need to buy another PSU.

Oh, and yeah you should generally stick to Gold for higher end builds.

 

[TheDownyy]

You should probably pick up at least an 850W. At least, probably even more.

I sumed most of my stuff up....

The 970's will use a maximum of 145w each making that 290w; My CPU will use a maximum of 85w(I believe) maybe more with overclock; then the 780 will use upto 250w(I can almost guarantee that it wont use that much at all for PhysX). If you add them all up then you get...(pulling my calculator out)... 625w.

I haven't added the HDD's because I don't know that they take but that's kinda why I'm asking this question. I was told that the Bronze, Silver, Gold or platinum are the only guarantee's the Manufacturer can produces meaning, If I had 750w at 80 Gold that means it guarantees 80% usage. Is this right?

Yeah but you have two SSD's (might want to look into it and see if the 4790k will not bottleneck the 3 cards plus the m.2 SSD with it's small 16 PCI lanes) and 3 HDDs. Plus I'm assuming you're gonna OC. I just like the headroom and it gives a PSU that you can keep longer. It's probably a better idea to go with more power just in case. Want to upgrade? No need to buy another PSU.

Oh, and yeah you should generally stick to Gold for higher end builds.

Ok! Thanks alot! I know about having a good rating for High-end builds but thank you anyways and I will look into the M.2 and card being bottlenecked by the CPU.

Thanks for the help!