Has anyone tried a Tri-Sli with 3 GTX 295's?

[ChrisRay]

Originally Posted by Muppet

You don't need to use the bridge for SLI. It will result in lower performance though.

This is actually untrue. For 3 Way SLI. A bridge is required. And for 6 way it would be even more mandated. The reason being is PCIE bandwith may be enough ((albeit slower)) to drive 2 cards in AFR mode. The more GPUS will greatly increase the latency required for SLI operation and would end up causing a serious performance deficit.

[LabShark]

Nah - 2 is enough for me.

[JasonPC]

People have used 3 or more it for folding and even "home supercomputing"

But that's not SLI...

[hemmy]

Originally Posted by Dazz

Working for Cyberpower System we have experimented with it, 3 way SLI will not work and folding on a 3 way SLI board will also mean much much lower performance. We found on a X48 board or a Crossfire board Folding performance is almost doubled. one of the cards dual GPU's will refuse to work correctly on SLI motherboards. Just a word of advice, as we build high end gaming systems and folding systems for medial research and data centres.

Folding performance is definitely not lower with 6 gpus if you use them correctly.

[Muppet]

Originally Posted by ChrisRay

This is actually untrue. For 3 Way SLI. A bridge is required. And for 6 way it would be even more mandated. The reason being is PCIE bandwith may be enough ((albeit slower)) to drive 2 cards in AFR mode. The more GPUS will greatly increase the latency required for SLI operation and would end up causing a serious performance deficit.

I was actually only replying to a post above that said SLI was not possible without the Bridge. That is wrong in that SLI will function without the Bridge. Sorry, I was only talking about 2 way SLI.

[JasonPC]

Well I assumed you'd use an SLI bridge on a high end card like that. I never really put it to the test but I thought not using an SLI bridge was more of a thing for lower end cards.

[ChrisRay]

Originally Posted by Muppet

I was actually only replying to a post above that said SLI was not possible without the Bridge. That is wrong in that SLI will function without the Bridge. Sorry, I was only talking about 2 way SLI.

Understood. Just thought Id clear up any misconceptions incase someone else misunderstood.

[JackOfAll]

Originally Posted by Sazar

Who cares about the delay. Imagine the folding horsepower

70K PPD. These are Palit single PCB GTX295's with EK FC-295 water blocks, clocked to 684/1476/1080, same as FTW spec.

[Bman212121]

Originally Posted by JackOfAll

70K PPD. These are Palit single PCB GTX295's with EK FC-295 water blocks, clocked to 684/1476/1080, same as FTW spec.

All I have to say is WOW.


EDIT: Alright I have to say more. I'm really impressed by the build. I've seen a lot of folders who only go halfway to build their F@H rigs. Nice you see you go with the water setup to make sure the heat stays down versus throwing 4 gpus stacked in there with an underpowered PSU. How much power does that setup draw when loaded?

[JackOfAll]

Originally Posted by Bman212121

I'm really impressed by the build. I've seen a lot of folders who only go halfway to build their F@H rigs. Nice you see you go with the water setup to make sure the heat stays down versus throwing 4 gpus stacked in there with an underpowered PSU. How much power does that setup draw when loaded?

The build has changed a little since those pictures were taken - mostly power supplies, wiring and tubing routing.

Main power supply is an Enermax Revolution 1250W. Secondary power supply is a Thermaltake W0158 650W Toughpower Power Express VGA PSU. The Tt powers 2x GTX295, Enermax everything else. Total power draw from the wall (both supplies) is just over 1200W.