How many watts for 3 290xs?

[Syndicution]

I currently have a single 295x2 and a 1000w PSU, but I want to add another 290x.
How many watts do I need for 3 290xs and an i7 4790k @ 4.7 GHz??

 

[davidarad02]

I don't think you can add a 290x to a 295x2 in crossfire.

 

[fnmeo]

too many

 

[jerdle]

I'd use a good 1200w psu.

And yes you can trifire it.

 

[loki1944]

I'd say that's cutting it too close; I'm drawing 750W with my 290X crossfire rig and 4770K @stock with 16GB of RAM; adding another 290X is going to put you right around 1000W. I'd say get at least a 1300W PSU.

 

[geofelt]

This chart suggests 1300w.
http://www.realhardtechx.com/index_archivos/Page362.htm

Then, usually adding a third gpu does not add much.
Check some benchmarks to see if they apply to you.

If budget is not an issue, Titan X or more likely a rumored GTX980ti might be a better approach using your existing psu.

 

[Quixit]

290x has a 290watt TDP.

290 x 3 + 88 (CPU) + 20% = 1149.6W, and that's assuming everything is stock. I'd recommend at least a 1300watt power supply of good quality.

But, saying that. I would recommend against a tri-crossfire setup. Once you go past 2 GPUs in an SLI or Crossfire setup the benefits are greatly reduced and the consistency issues that multi-GPU setups have are increased. In the vast majority of real-world cases it's not really worth it. You might want to consider getting a Freesync-compatible monitor instead because it would probably improve your gaming experience more than another card.

 

[Newbbuilder11]

I currently have a single 295x2 and a 1000w PSU, but I want to add another 290x.
How many watts do I need for 3 290xs and an i7 4790k @ 4.7 GHz??

Recommended a solid 1300 watt unit, but CFX 290x's aren't going to get you places. It can cause stuttering on Dying Light and CFX drivers are still buggy.

 

[Syndicution]

I currently have a single 295x2 and a 1000w PSU, but I want to add another 290x.
How many watts do I need for 3 290xs and an i7 4790k @ 4.7 GHz??

Recommended a solid 1300 watt unit, but CFX 290x's aren't going to get you places. It can cause stuttering on Dying Light and CFX drivers are still buggy.

I don't play dying light and I have no plans on doing so....

 

[Newbbuilder11]

I currently have a single 295x2 and a 1000w PSU, but I want to add another 290x.
How many watts do I need for 3 290xs and an i7 4790k @ 4.7 GHz??

Recommended a solid 1300 watt unit, but CFX 290x's aren't going to get you places. It can cause stuttering on Dying Light and CFX drivers are still buggy.

I don't play dying light and I have no plans on doing so....

I was just stating a point, some games don't take to kindly to CFX or SLI, that is why I stick with just one solid card.

 

[loki1944]

I currently have a single 295x2 and a 1000w PSU, but I want to add another 290x.
How many watts do I need for 3 290xs and an i7 4790k @ 4.7 GHz??

Recommended a solid 1300 watt unit, but CFX 290x's aren't going to get you places. It can cause stuttering on Dying Light and CFX drivers are still buggy.

I don't play dying light and I have no plans on doing so....

I was just stating a point, some games don't take to kindly to CFX or SLI, that is why I stick with just one solid card.

You can just disable SLI/CF for those few games where it's a problem. Then you have the benefit of mulit-GPU with the ability to go single card if needed.