EVGA Supernova NEX750g PSU and SLI EVGA GTX 770 sc

[alpha1212]

So I currently have an EVGA nex750g psu and an EVGA gtx 770 SC gpu and I was wondering if the psu is enough for this because of the way the whole weird multi rail thing works. It says it's rated for 20A and 12v which is 240W but my gpu apparently needs 250W... Not totally sure if everything would work out. 

I'm also interested in a second 770 in the future for sli and I'm not sure if this psu could properly support it.

some basic specs:
-MSI Z87 GD65 mobo
-EVGA GTX 770 SC gpu (2nd in the future?
-2x4GB ddr3 1600 ram
-4670k CPU
-120GB 840 EVO ssd
-1TB seagate hdd
-212 EVO fan and a couple case fans

[WoodenMarker]

It's plenty of power. You're fine.

[Luke]

So I currently have an EVGA nex750g psu and an EVGA gtx 770 SC gpu and I was wondering if the psu is enough for this because of the way the whole weird multi rail thing works. It says it's rated for 20A and 12v which is 240W but my gpu apparently needs 250W... Not totally sure if everything would work out. 

I'm also interested in a second 770 in the future for sli and I'm not sure if this psu could properly support it.

some basic specs:

-MSI Z87 GD65 mobo

-EVGA GTX 770 SC gpu (2nd in the future?

-2x4GB ddr3 1600 ram

-4670k CPU

-120GB 840 EVO ssd

-1TB seagate hdd

-212 EVO fan and a couple case fans

 

The 12V rail has rails have 61A/732W on them in total. Yes you can put get another 770 in the future without any problems. I was trying to stress test my rig to see the total power usage and in prime95 it was only in the mid-high 200's but i realized the GPU wasn't being used so i ran a few runs of Unigine Valley on extreme HD and it peaked at 360w but on average was 330w. Keep in mind my 8320/7970 each use more power than your 4670k/770.

[airdeano]

So I currently have an EVGA nex750g psu and an EVGA gtx 770 SC gpu and I was wondering if the psu is enough for this because of the way the whole weird multi rail thing works. It says it's rated for 20A and 12v which is 240W but my gpu apparently needs 250W... Not totally sure if everything would work out. 

I'm also interested in a second 770 in the future for sli and I'm not sure if this psu could properly support it.

some basic specs:

-MSI Z87 GD65 mobo

-EVGA GTX 770 SC gpu (2nd in the future?

-2x4GB ddr3 1600 ram

-4670k CPU

-120GB 840 EVO ssd

-1TB seagate hdd

-212 EVO fan and a couple case fans

 

what i used to do on multi-rail PSUs was to use one 6-pin connector from one

rail and another 6/8-pin from another to combine any power rails (x2) to satisfy

the power need.

but you might wanna drop a line to EVGA and have them verify the power

needs of your GPU to their PSU output rail values.

 

The 12V rail has 61A/732W on it alone. Your PSU is overkill and yes you can put get another 770 in the future without any problems. I was trying to stress test my rig to see the total power usage and in prime95 it was only in the mid-high 200's but i realized the GPU wasn't being used so i ran a few runs of Unigine Valley on extreme HD and it peaked at 360w but on average was 330w. Keep in mind my 8320/7970 each use more power than your 4670k/770.

 

are you sure of those specs on the OP PSU? one 12v rail? looks like 4-rails.

 

from EVGA it has four 12v rails rated 20A each (=80A, but rated 750w).

http://www.evga.com/products/pdf/120-PG-0750-GR.pdf

[Luke]

 

what i used to do on multi-rail PSUs was to use one 6-pin connector from one

rail and another 6/8-pin from another to combine any power rails (x2) to satisfy

the power need.

but you might wanna drop a line to EVGA and have them verify the power

needs of your GPU to their PSU output rail values.

 

 

are you sure of those specs on the OP PSU? one 12v rail? looks like 4-rails.

 

from EVGA it has four 12v rails rated 20A each (=80A, but rated 750w).

http://www.evga.com/products/pdf/120-PG-0750-GR.pdf

 

 

Yea it is 4 rails but the total amps is 61A (732W combined for the 12V) that should be plenty, Right? Or does it matter that each individual doesn't have much power?. It's odd how it shows 4 rails with 20A each but then underneath says 61A. You would think 4 rails with 20A each would equal 80A? 

[airdeano]

 

Yea it is 4 rails but the total amps is 61A (732W combined for the 12V) that should be plenty, Right? Or does it matter that each individual doesn't have much power?. It's odd how it shows 4 rails with 20A each but then underneath says 61A. You would think 4 rails with 20A each would equal 80A? 

 

 

it is enough, but if needing more than 20A for a device, then you'd use two rails to supply the power requirement.

and OP should contact EVGA for exact connection (since both EVGA products).

61A divided by 4rails is 15A, but that'd be a technical question for EVGA.

[quan289]

The 20A per rail doesn't mean you are able to output all 20A on all +12v rails at the same time (totaling 960w of power). It's just a virtual limitation that limits the amount of currents can past through a group of cable at a single time. Basically, it's a protection to ensure there isn't a failure of some sort that, for example, output all of that 61A (760w) on a single PEG cable for your GPU. It's a bit like the circuit box inside of your house.

 

Anyways, the EVGA NEX750G isn't exactly a great power supply due to it group-regulation design and low OCP trip point, but you should be fine powering two 770s.

 

12v1 = 24-pin and EPS12v1

12v2 = PEG1 and PEG2

12v3 = EPS12v2, Molex, and SATA

12v4 = PEG3 and PEG4

 

So your 770s will be plugged into the 12v2 and v4

http://www.techpowerup.com/reviews/EVGA/NEX750G/2.html