Doom 4 GTX1080 SLI Performance Issues

[crinkleshoes]

Hey,

Anyone else getting issues with SLI @ 4K in this game?

With SLI enabled, I am getting 45-50FPS with dips into the low 20s.

Running on only a single card, it's averaging 70-75FPS without any dips below 60FPS... very impressive single card performance - but what the heck is up with SLI?

I have tried changing the settings in Nvidia control panel to force AFR1/AFR2 but that doesn't make much difference and the utilisation is sitting at about 65% for GPU1 and 35% for GPU2.

 

[crinkleshoes]

I'm pretty sure it works on the engine, however you have to be on the right drivers. Try 365.10, that's what I'm using and I get the best performance with SLI. If I update the drivers I get lower FPS, even the "doom optimized" driver.

That driver version isn't compatible with the 1080 though, is it?

 

[crinkleshoes]

Switched to the only other driver compatible with 1080 - 368.25 - and no improvement

 

[crinkleshoes]

Yeah - I have the same thing happening. Especially when you get up close and personal with the enemies... but with a single card, I haven't seen it drop below 60FPS... usually in the 70-75FPS range without an overclock, on nightmare settings.

Hopefully they'll have it sorted at some point... but I am mightily impressed with the single card performance at 4k - really good numbers

 

[crinkleshoes]

To top things off...

Total War Warhammer... SLI bumps up performance about 50% but flickers enough to give someone without epilepsy a fit.

Rollercoaster Tycoon World... 10% boost in performance, so practically pointless.