will my 3 year old 650w bronze certified PSU power a gtx 770 superclocked acx?

[Alex123654]

i need some help because im buying this card in january.

using 8gb ram
intel i5 2500 overclocked at 4.3 ghz

 

[Anas Bashar]

regarding the total power, yes it will. BUT can you tell the exact model of that PSU? coz you will need al least 48A on the +12V rail.

 

[cuecuemore]

What's the exact model of the PSU? If it's of a decent build quality it will be fine.

 

[unksol]

regarding the total power, yes it will. BUT can you tell the exact model of that PSU? coz you will need al least 48A on the +12V rail.

That would be massive overkill. It's a 230W card 40A would be plenty for almost any system and most could do with even less

 

[Anas Bashar]

regarding the total power, yes it will. BUT can you tell the exact model of that PSU? coz you will need al least 48A on the +12V rail.

That would be massive overkill. It's a 230W card 40A would be plenty for almost any system and most could do with even less

the card will need about 20A, add to that another 20A for the OCed CPU (162W at stock clock, 311W(26A) at 5Ghz, so about 250W(20A) roughly at 4.3Ghz)
http://www.bit-tech.net/hardware/2013/06/12/intel-core-i5-4670k-haswell-cpu-review/6

 

[cuecuemore]

The card will need 20A, the CPU won't need nearly that much, 15A tops. Those are AC power draws on that graph...

 

[Anas Bashar]

The card will need 20A, the CPU won't need nearly that much, 15A tops. Those are AC power draws on that graph...

oh, yes you are right. i didn't pay attention to that. thanks.

so let me revise here: OCing this CPU to 5Ghz adds 150W to the overall power consumption, so it is safe to assume this 150W(12A) difference is almost used entirely by the OCed CPU right? (quoting from the site "Load Power Consumption: For this test, we want to only stress the CPU, so use the smallfft stress test of Prime95 to fully load all available processors (logical as well as physical).

max TDP of the CPU 3.7Ghz (not OCed) is 95W(8A)
so that means the total load of the OCed CPU is 20A (although i belive it will be about 18A)

CPU's power cannot be neglected when calculating the required power on the +12V rail. even when the CPU is not OCed, its max TDP is about 95W (8A).
and in general, leaving some headroom is important when deciding on the PSU, even if no future upgrades were planned.

am i missing something here? i hope someone corrects me if am wrong