PSU for my setup with 970 sli

[kobe22kobe]

my current setup:
cpu: i5 4690k{4.2Ghz}
motherboard: asus maximus vii hero
gpu:sapphire r9 280x tri-x oc
cpu cooler : corsair h100i
memory: corsair vengence 16gb ddr3
case: cooler master storm scout 2{2 case fans}
optical drive: asus 24d3st
hdd: seagate barracuda 3tb
seagate barracuda 1tb
ssd: samsung 850 evo 250gb
psu: cooler master g750m

i want to upgrade to gtx 970 sli (either msi tf or asus strix)
do i need to change my psu for that?
i am gonna play at 3440*1440 resolution. and if i need to change my psu then i ll be looking for 290x cf setup.

 

[BadBoyGreek]

my current setup:
cpu: i5 4690k{4.2Ghz}
motherboard: asus maximus vii hero
gpu:sapphire r9 280x tri-x oc
cpu cooler : corsair h100i
memory: corsair vengence 16gb ddr3
case: cooler master storm scout 2{2 case fans}
optical drive: asus 24d3st
hdd: seagate barracuda 3tb
seagate barracuda 1tb
ssd: samsung 850 evo 250gb
psu: cooler master g750m

i want to upgrade to gtx 970 sli (either msi tf or asus strix)
do i need to change my psu for that?
i am gonna play at 3440*1440 resolution. and if i need to change my psu then i ll be looking for 290x cf setup.

Any of the mid to high end current generation cards in SLI / Crossfire recommend at least a minimum of 850 - 1000w PSU. if you're going to do two 290x cards, I wouldn't go less than 1000w. I'm shocked frankly that you have three 280x cards running on 750w - they recommend 850w minimum for two.

 

[Onus]

Based on a HardOCP review of your PSU's smaller brother (same OEM), at realistic temperatures yours is most likely to be a 700W PSU, possibly only 650W. Fortunately, that is enough for a pair of GTX970 graphics cards.

Edit: The OP does not have three cards now, he has a model called "tri-x" likely because of its three fans.
A pair of power-hungry 290x cards would need 850W, but the more frugal GTX970 does not.

 

[BadBoyGreek]

Based on a HardOCP review of your PSU's smaller brother (same OEM), at realistic temperatures yours is most likely to be a 700W PSU, possibly only 650W. Fortunately, that is enough for a pair of GTX970 graphics cards.

Edit: The OP does not have three cards now, he has a model called "tri-x" likely because of its three fans.
A pair of power-hungry 290x cards would need 850W, but the more frugal GTX970 does not.

I often hear of triple crossfire setups referred to in that context so that threw me for a loop. That being said, I'd still consider going with something slightly beefier given the OCing and to also have some extra overhead. I prefer to always have a little more than "just enough".

 

[kobe22kobe]

my current setup:
cpu: i5 4690k{4.2Ghz}
motherboard: asus maximus vii hero
gpu:sapphire r9 280x tri-x oc
cpu cooler : corsair h100i
memory: corsair vengence 16gb ddr3
case: cooler master storm scout 2{2 case fans}
optical drive: asus 24d3st
hdd: seagate barracuda 3tb
seagate barracuda 1tb
ssd: samsung 850 evo 250gb
psu: cooler master g750m

i want to upgrade to gtx 970 sli (either msi tf or asus strix)
do i need to change my psu for that?
i am gonna play at 3440*1440 resolution. and if i need to change my psu then i ll be looking for 290x cf setup.

Any of the mid to high end current generation cards in SLI / Crossfire recommend at least a minimum of 850 - 1000w PSU. if you're going to do two 290x cards, I wouldn't go less than 1000w. I'm shocked frankly that you have three 280x cards running on 750w - they recommend 850w minimum for two.

Based on a HardOCP review of your PSU's smaller brother (same OEM), at realistic temperatures yours is most likely to be a 700W PSU, possibly only 650W. Fortunately, that is enough for a pair of GTX970 graphics cards.

Edit: The OP does not have three cards now, he has a model called "tri-x" likely because of its three fans.
A pair of power-hungry 290x cards would need 850W, but the more frugal GTX970 does not.

so there is no risk in putting 2 970's in my setup
and yes which one to go for msi or asus

 

[Mousemonkey]

I'm running SLi'd 970's on a 620w PSU so I reckon you are good to go.

 

[Onus]

I have an Asus Strix, which has been running well. It is a massive card though, although it should fit in your case.

 

[kobe22kobe]

Thanks for all your great help.