GTX780 Metro Last Light VRAM & PHYSX query

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Hi, this isnt a major, more of an inquisitive thing.

I have a query about Last light, I just last night had the issue where Last Light Crawls to a halt on anything complex, frame rate dips down to 18 fps, even though Physx is set to auto\gpu, and at the same time according to EVGA precision, the gpu usage drops like a stone.

After some muddling around with google, I established the Nvidia physx drivers were screwing with it, and switching it to CPU physx , even though CPU isnt selected as the preferred physx method ( hardly for a GTX780ACX)

I found that reinstalling the driver and or rolling back from 320.49 and or completely freshly installing to 318 did not fix the issue, and eventually shifted the three physx loading files out of LL folder, which rectifed the issue and let LL Utilize the GPU again and the FPS once again skyrockets as it should and the GPU usage goes right up.

Some really screwed up business, took me ages to figure that out, was driving me nuts wondering if something was wrong with my computer. I have seen alot of this about on the net , people saying SLI Titans doing the same thing, and GTX6 series cards suffering same issues.

Anyway, what I noticed before and after was this,

I am running the game in 2540x1440 resolution in Very high detail, physx on, AF 16x but have turned off SSAA as it criples my card.

with

Core i7 3770K with Corsair H100i
16GB Corsair Vengeance
EVGA GTX780ACX 3GB superclocked
1200W Silverstone PSU

Before this issue, I noticed that 1440p, it used 1156-1225 MB Of vram

Now it appears to be using 1000-1084MB? In the same scene in the same spot of the game,

I dont get it, does the coding vary the gpu memory load or is EVGA precision just innaccurate?

I have read at LL is very memory efficient on the GPU and even at bigger resolutions doesnt even pass 1300-1400MB.

Just more bamboozled than anything, or is it the difference between say 320.49 or 320.18 utilizing different memory amounts.


Oh another note too, I had changed my PSU to limit coil whine on my gpu as it was bad on my cruddly power supply, I noticed with 320.49 drivers my card would moan just sitting at the desktop intermittently, gone back to 320.18 the issue is gone, whats up with that?
 
Solution
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780 isnt even...
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The EVGA ACX GTX780 is more than enough to beef out Last Light, proven by mulitple benchmarks across the board on countless reviews & benchmarks across the net, a standard reference 780 can even maintain decent playable framerates on max detail at 5760x1080, so sorry but I dont buy your answer. The superclocked version of the card is even better than Titan in some instances. Metro 2033 is no where as well optimized so Id agree that 2033 is a pig and generally youd need multi gpu config to sort it out but Not Metro Last light.
 

Intel God

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Jun 25, 2013
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Playable fps? Really?

2560_VH.png

 
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780 isnt even on that list. What are they using a Pentium dual core?

http://www.legitreviews.com/article/2206/9/

Besides the point, the game runs absolutely fine at 2540x1440 with everything cranked apart from SSAA after I rectified the stupid physx bug the driver introduced, ranges from 40-94 fps, depending on the load, my query was about its VRAM usage. Saying that the GTX780 superclocked cant run Last Light at 2540x1440 is a load of crap sorry
 
Solution

redeemer

Distinguished
Again I know it must be tough since you dropped +$600 on your card, but I repeat the GTX 780 cannot run Metro Last Light at silk smooth playable fps @ 2560 resolutions. My SLI 680's utterly destroys the GTX 780 and even with my setup I get fps dips @ 1920x1200. I am not sure what you were expecting, but you should have done more research before you purchase. 2560 res gaming still requires SLI for most modern games 60+ fps
 

Gorzul

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Mar 28, 2014
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Same problem FPS. stuck at 16, even when i lowered to LOW and turned off half the options, like SSAA. Didnt touch the PhysX though. Whats going on? Playing at 1080.
Can this game not be played with physx enabled? whats the deal, whats the physx fix?

Gygabite GTX 780Ti with a i7 4770K and 16gb Corsair Vengeance Pro 2400MHz