AX1500i

[ShivamPlays]

Is a Corsair AX1500i compatible with a 4-way 780ti setup?

[daemonowner]

Yes, it has enough PCIE connectors.

Yes, it should be able to power them. Expect less than 300W per card, giving you 300W headroom.

No, I would not recommend 4way 780Ti's. Not really worth it in most cases.

[GloriousPain]

Yes it can, should you do it? FUCK NO. Think about it unless you have 5960X you won't have sufficient PCIE lanes to prevent bottleneck, 4way is rarely supported by games and may harm performance, and think about it Vram is replicated on each gpu so 3GB card divide by 4 = .75GB per card which is gonna be a hell of an issue, Get either 290s or titans... Also HEAT and Noise. >.< 

@ShivamPlays

[Enderman]

Please do not do 4 way SLI. Just no.

[Aniallation]

Is a Corsair AX1500i compatible with a 4-way 780ti setup?

Yes, it will be just right

 

But 4 way SLI is performs maybe 5% better then 3 way

[Askew]

Yes, but use a 3 way SLI config if it's for gaming.

[Excon]

Yes it can, should you do it? FUCK NO. Think about it unless you have 5960X you won't have sufficient PCIE lanes to prevent bottleneck, 4way is rarely supported by games and may harm performance, and think about it Vram is replicated on each gpu so 3GB card divide by 4 = .75GB per card which is gonna be a hell of an issue, Get either 290s or titans... Also HEAT and Noise. >.< 

@ShivamPlays

Thats not how VRAM in SLI works. Also 4 way SLI is not longer officially supported so the benefit from 3 cards to 4 is non existant

[ForsakenLive]

Yes it's compatible.

 

 

Yes it can, should you do it? FUCK NO. Think about it unless you have 5960X you won't have sufficient PCIE lanes to prevent bottleneck, 4way is rarely supported by games and may harm performance, and think about it Vram is replicated on each gpu so 3GB card divide by 4 = .75GB per card which is gonna be a hell of an issue, Get either 290s or titans... Also HEAT and Noise. >.< 

@ShivamPlays

mmm what? That's not how it works at all, the VRAM doesn't get split across all GPUs, it's the same buffer on all of them, but processing is done in parallel. A motherboard that supports 8x8x8x8x will be able to drive 4 GPUs in SLI, and there is no such bottleneck, not even the Titan black will saturate 8x PCIe 3.0 on a noticeable amount, the frames lost are withing margin of error. On boards around $200 (or even less. like the Gigabyte  Gaming GT) you can successfully do a 4 way SLI config without PCIe limits.

 

 

Mind you OP, that this setups not only make no sense on $/performance, but also might impact negatively on performance. Almost every 4-way benchmark performs less than the 3-way one.

[GloriousPain]

Thats not how VRAM in SLI works. Also 4 way SLI is not longer officially supported so the benefit from 3 cards to 4 is non existant

Okay I may be wrong on that, shortly after saying that I felt something was up but yeah from everything I can find all cards in SLI share Vram so 3GB shared across 4 cards does average .75GB each but as said I might be horribly wrong;  and Exactly as I had said did youread my whole comment I even said it might hurt performance...

[Excon]

Yes it's compatible.

 

 

mmm what? That's not how it works at all, the VRAM doesn't get split across all GPUs, it's the same buffer on all of them, but processing is done in parallel. A motherboard that supports 8x8x8x8x will be able to drive 4 GPUs in SLI, and there is no such bottleneck, not even the Titan black will saturate 8x PCIe 3.0 on a noticeable amount, the frames lost are withing margin of error. On boards around $200 (or even less. like the Gigabyte  Gaming GT) you can successfully do a 4 way SLI config without PCIe limits.

 

 

Mind you OP, that this setups not only make no sense on $/performance, but also might impact negatively on performance. Almost every 4-way benchmark performs less than the 3-way one.

The problem wouldnt be a bandwidth bottleneck but a CPU bottleneck

[GloriousPain]

mmm what? That's not how it works at all, the VRAM doesn't get split across all GPUs, it's the same buffer on all of them, but processing is done in parallel. A motherboard that supports 8x8x8x8x will be able to drive 4 GPUs in SLI, and there is no such bottleneck, not even the Titan black will saturate 8x PCIe 3.0 on a noticeable amount, the frames lost are withing margin of error. On boards around $200 (or even less. like the Gigabyte  Gaming GT) you can successfully do a 4 way SLI config without PCIe limits.

okay thank you I thought something I had said sounded off 

(also note I just got back from a surgery and am on painkillers atm)

[ForsakenLive]

The problem wouldnt be a bandwidth bottleneck but a CPU bottleneck

that's for sure, even a 4790k would need a fair amount of OC to not hold back those bad boys

[ShivamPlays]

Yes it can, should you do it? FUCK NO. Think about it unless you have 5960X you won't have sufficient PCIE lanes to prevent bottleneck, 4way is rarely supported by games and may harm performance, and think about it Vram is replicated on each gpu so 3GB card divide by 4 = .75GB per card which is gonna be a hell of an issue, Get either 290s or titans... Also HEAT and Noise. >.< 

@ShivamPlays

well then what configuration should i invest into if i want to play at high settings at 5760x1080 and also be able to record and render video? money is not an object here. If you wouldnt mind could i have nVidia and AMD equivalent GPU suggestions?

[ShivamPlays]

Also, would 780ti 3-way sli be sufficient for high setting 5760x1080 gaming?

[GloriousPain]

well then what configuration should i invest into if i want to play at high settings at 5760x1080 and also be able to record and render video? money is not an object here. If you wouldnt mind could i have nVidia and AMD equivalent GPU suggestions?

2x Titan Black, 3x 780Ti, 3x 290x VaporX, or a 295x2 

[Str_Mape]

If money is no issue then I'd get 3 x 8GB 290X's

[Victorious Secret]

OP asked if a 1500i can handle 4 way SLI.

 

Not a fucking life lesson on why he shouldn't 4 way SLI.

 

Good grief you people. 

[ShivamPlays]

OP asked if a 1500i can handle 4 way SLI.

 

Not a fucking life lesson on why he shouldn't 4 way SLI.

 

Good grief you people.

 

Finally, some sensible people on this forum.