PSU for gtx 970 and then later for gtx 980 ti recommendations?

[PatrikVujicic]

Hello!
I was thinking to buy the gtx 970 and PSU :
Evga Supernova G2 750 but I don't know if this would be enough for gtx 980 ti later when I will have enough money to buy it should I rather go with G2 850W to be safe? Also I have i5 3570 non k lga 1155 CPU do you think it would bottleneck the 980 ti? I know that it won't bottleneck the 970 but not sure for 980. Thanks

 

[PatrikVujicic]

Also I would overclock GPU so do i need more power for that?

 

[geofelt]

You are more than good with 750W for GTX980ti. That is what I use.
http://www.realhardtechx.com/index_archivos/Page362.htm
If you are gaming at 1080P, you will be very pleased with the GTX970.
If you will be going to a 4k monitor, then the GTX980ti will be what you want.
At 1440P, GTX970 will be good for most games, but not all.

To test the need for more cpu horsepower, run these tests to find out in a backhanded way:
------------------------------------------------------------
To help clarify your CPU/GPU options, run these two tests:

a) Run your games, but lower your resolution and eye candy.
If your FPS increases, it indicates that your cpu is strong enough to drive a better graphics configuration.
If your FPS stays the same, you are likely more cpu limited.

b) Limit your cpu, either by reducing the OC, or, in windows power management, limit the maximum cpu% to something like 70%.
Go to control panel/power options/change plan settings/change advanced power settings/processor power management/maximum processor state/
This will simulate what a lack of cpu power will do.
Conversely what a 30% improvement in core speed might do.

You could also experiment with removing one core. You can do this in the windows msconfig boot advanced options option. set the number of processors to less than you have.
This will tell you how sensitive your games are to the benefits of many cores.

If your FPS drops significantly, it is an indicator that your cpu is the limiting factor, and a cpu upgrade is in order.

It is possible that both tests are positive, indicating that you have a well balanced system, and both cpu and gpu need to be upgraded to get better gaming FPS.
-------------------------------------------------------------

 

[IntelTurtleFan]

A good 750W is nice. The G2 is a great PSU and one of the best period.

 

[PatrikVujicic]

Nice thank you both