Older SLI?...

[xSOSxHawkens]

So I have temporailly had to resurect an ancient GPU into my secondary rig my girlfriend uses, as its normal HD7870 got pulled to lend to a friend who had their GPU die.

In the interm I am pressing an old GTX 295 into service, which for those to young to remeber is a dual GPU card that stuffs two GTX 260/80 cores into a single card.

It was once the Titan of its time and it still holds a decent punch. She uses it to play The Forest for example (Unity 4/5 engine) @ 1080p for example on lower to medium setting without issues and with nearly double scaling using SLI (15-30fps single GPU, 30-50 double GPU). To get SLI working sucessfully in this more modern title with the older Nvidia drivers I have to manually bind it to Alternate Frame Rendering mode 2 via the drivers.




With WT its an entirely differnt struggle. I can get decent framerates (45-65) at lower settings with full GPU utilization on a single GPU but not on both when running DirectX. When running two GPU's in DirectX I get horible frame rates (15-30) and only 30-50% utilization split across both GPU's. This happens regardless of using Base Nvidia profiles for WT, or or\verriding for Alternate Frame Rendering Mode 1 or Mode 2 (war thunder was already established AND supporting SLI when the last driver update for this card released).

Further, if I use SLI with OpenGL I get the expected frame rate boost but have bad issues with image corruption and artifacting regardless of using a single GPU or using both, so effectivly open GL is out because it is bugged.



Anyway for me to get correct scaling and GPU usage from a GTX295 in warthunder? Or am I stuck pretending I have a 260 instead with this game?...

[Jeruzalem]

2 cores on 1 card is not sli is it? Sli is the utilization of 2 seperate cards.

[Lrfss]

I have two seperate GTX760 cards in true SLi with no issues, in fact I run max all settings at 60 plus FPS with that. I don't think he has true Si my guess.

[xSOSxHawkens]

Originally posted by aMEIzing:

2 cores on 1 card is not sli is it? Sli is the utilization of 2 seperate cards.

SLI is two or more GPU's regardless of how it is acheived. Same for Crossfire from AMD. With dual GPU cards they just use an internal SLI/CF bridge between the GPU's instead of an external one.

Though dual GPU cards are a bit more rare now days than a few years ago... This card dates from the start of the Dual GPU era, I think the second dual GPU card nVidia made, vehind the 9800 GX2...

[xSOSxHawkens]

So... Anyone have a solution to getting older sli working...

[xSOSxHawkens]

Bump...

[xSOSxHawkens]

Bumpity McBumbpertons...

[Scheneighnay]

Originally posted by xSOSxHawkens:

Originally posted by aMEIzing:

2 cores on 1 card is not sli is it? Sli is the utilization of 2 seperate cards.

SLI is two or more GPU's regardless of how it is acheived. Same for Crossfire from AMD. With dual GPU cards they just use an internal SLI/CF bridge between the GPU's instead of an external one.

Though dual GPU cards are a bit more rare now days than a few years ago... This card dates from the start of the Dual GPU era, I think the second dual GPU card nVidia made, vehind the 9800 GX2...

Supposedly both AMD's and Nvidia's next generation will go back to doing that.
There was something about how instead of having a different GPU in each card for the generation, each card will have the same GPU, but different numbers of it per card.

Not sure how true it is.

[xSOSxHawkens]

Well to be fair the GTX 295 is not *actualy* a single pcb dual gpu card...

The 295 is infact the only example of a single add in card cromprised of two full GPU PCB boards sandwidched together.

It is quite litterly two graphics cards in one package with the PCB's sandwiched ontop of each other.

[xSOSxHawkens]

Bump

[Jeruzalem]

So why do you use a card from 2000? We are already at the 1000 series. A gtx 1050 aint expensive at all, runs both better and at a lower energy use than that gtx 295.

[Chaotic Harmony]

Originally posted by Scheneighnay:

Originally posted by xSOSxHawkens:

SLI is two or more GPU's regardless of how it is acheived. Same for Crossfire from AMD. With dual GPU cards they just use an internal SLI/CF bridge between the GPU's instead of an external one.

Though dual GPU cards are a bit more rare now days than a few years ago... This card dates from the start of the Dual GPU era, I think the second dual GPU card nVidia made, vehind the 9800 GX2...

Supposedly both AMD's and Nvidia's next generation will go back to doing that.
There was something about how instead of having a different GPU in each card for the generation, each card will have the same GPU, but different numbers of it per card.

Not sure how true it is.

His card is basically as you said; two GPU's with a internal SLI connector. Next generation will be MCM (supposedly) where multiple GPU's are wired with an interface (Infinity Fabric) and placed on an interposer to act and appear as a single GPU to the applications and computer.

[xSOSxHawkens]

Originally posted by aMEIzing:

So why do you use a card from 2000? We are already at the 1000 series. A gtx 1050 aint expensive at all, runs both better and at a lower energy use than that gtx 295.

Because I am not going to buy another gpu to put in my GF computer while I lend out the HD7870 that normally runs in it when I have a perfectly serviceable 295 is a box...

Honestly, WT is the only game I have had issues with so far using it. Even more modern titles like GTA-5 and The Forrest run without issue and have proper SLI usage...

Only game giving me issues is WT, and since the game has supported SLI since the most recent driver for the card I see little reason it wouldn't work correctly.

[Mos Eisley]

wth is up with WT and Linux and SLI

When I enable SLI, I get 1/3-1/2 the framerate I get with a single card. 14 FPS is not acceptable

running 2 660TI's one card gets me around 60 fps.. I figured going sli would net me at least 60 without overloading the single gpu

[Mos Eisley]

someone asked "why 2, when one can do xxx" well have you seen the price of cards these days? I added another to my system at a fraction of the cost of a new one and should have the same performance.

[Scheneighnay]

Originally posted by Mos Eisley:

someone asked "why 2, when one can do xxx" well have you seen the price of cards these days? I added another to my system at a fraction of the cost of a new one and should have the same performance.

SLI and crossfire aren't proper replacements for actual cards. They're usually buggy in games that are supposed to support them, and even when they do work, VRAM is still a bottleneck because it's redundant between them.