Corsair TX750 PSU for GTX 770 SLI

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phase03

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Oct 12, 2013
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I have the following rig:
i5-4670K non overclocked
8GB DDR3 1866
ASUS Z87 Plus
ASUS GTX770-DC2OC-2GD5
Corsair TX750 PSU
Samsung SSD and a WD Magnetic drive

This is very similar to the Q4 2013 enthusiast system with the exception of the single GPU.
I was thinking of adding (in due time) a second ASUS GTX770-DC2OC-2GD5 for SLI.
According the analysis, the Corsair TX750 PSU should be sufficient as power during the test (with overclocked CPUandGPU) didnt exceedd 650W:

http://www.tomshardware.com/reviews/build-your-own-geforce-gtx-770-sli,3709-14.html

Still, because i dont know the test conditions (how much operational time in the peak of 650W) and because i read that for GTX770 SLI a 850W PSU is recommended, i would like to double check that indeed my PSU will be enough.
I don't plan to overclock.


 
Solution
ko888
An ASUS GTX 770 DirectCU II OC 2 GB [GTX770-DC2OC-2GD5] draws less than 18 Amps from the +12V rail(s) while running FurMark.

If your existing power supply is able to provide 50 Amps or more on its combined +12V rails then it will be sufficient for a non-overclocked system running with two GTX770-DC2OC-2GD5 in 2-way SLI mode while running FurMark.

A TX750 has enough spare capacity to work even if you overclock the i5-4670K CPU.
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inzone

inzone

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Mar 12, 2011
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Your TX 750w model provides 62a on the +12v rail and the TX850w model provides 70a on the +12v rail. The GTX 770 will consume 31a or 250w so the 750w - 62a power supply will be a little short on the amps needed. That's why the 850w power supply is recomnded for two 770's in SLI.

However these are recommended numbers and there are those that have run two 770's on a 750w power supply because they have a quality brand that produces a consistant amount of amps and watts.
 
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ko888

ko888

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Feb 18, 2009
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An ASUS GTX 770 DirectCU II OC 2 GB [GTX770-DC2OC-2GD5] draws less than 18 Amps from the +12V rail(s) while running FurMark.

If your existing power supply is able to provide 50 Amps or more on its combined +12V rails then it will be sufficient for a non-overclocked system running with two GTX770-DC2OC-2GD5 in 2-way SLI mode while running FurMark.

A TX750 has enough spare capacity to work even if you overclock the i5-4670K CPU.
 
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Solution
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phase03

Honorable
Oct 12, 2013
7
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10,510


according:
http://www.hardwaresecrets.com/article/Corsair-TX750-V2-Power-Supply-Review/1227/7
that's possible
 
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