Recently I bought a new notebook with the following specs:

i7 4510u 2ghz (with HD4400 onboard)
8gb ram 1600mhz
gt840m 2gb


and I went to test LFS, and got some weird FPS...

with the onboard GPU:



The graphics settings i'm using (notice the HD graphics listed there)

the performance:

https://hostr.co/file/O3T6LQXJlvKy/FPSHD4200.PNG (44.4fps)



now with the gt840m:



and the performance:

https://hostr.co/file/xww8RBskNXO1/FPSgt840m.PNG (43.4fps)

look at the usage on nVidia inspector:




I never had a notebook with dedicated graphics card, is it normal to show 0mb usage?



I also tested Assetto Corsa, and it uses 100% of the GPU and get around 80fps (with low graphics and 1280x720)

Let me guess.. Windows 8.1?

Did you tried something like this?

Quote from cargame.nl :

Let me guess.. Windows 8.1?

Hell no, it came with Windows 8.1, but the first thing I made was to format and install Windows 7 SP1

Quote from 1303s_vortech :

Did you tried something like this?

Yes, indeed I did it, as you can see on the graphics settings, the first one shows that I was forcing the integrated graphics card, and on the second I was forcing the gt840m (you can read at the very bottom of the settings screens)

Quote from Specht77 :

I never had a notebook with dedicated graphics card, is it normal to show 0mb usage?

No mine provides memory usage info; http://i.imgur.com/1kTp4VO.png

But eehhmm.. Hmm ... Windows 7. Similar FPS results, strange. Does Nvidea Inspector reports any load while being @LFS?

While forcing the HD4400, it shows no usage, as you can see from the middle to the left:



but forcing the gt840m, it uses ~63% of the GPU as you can see from the middle to the right

Yeah.. I realized this a little bit later, hhmm odd situation. Whats the CPU doing? Not in some kind of power save mode? Check it's clocks with CPU-Z.

Forcing it to use the HD4400 the CPU stays at 2300~2400mhz

Forcing it to use the gt840m the CPU goes from 2000 to 2900mhz while doing a lap at blackwood alone

And it stays around 44 FPS with 63% load? Well.. I am puzzled. Only suggestion I can give is trying older drivers or newer beta from http://laptopvideo2go.com .. No explanation though why AC is running at 80 but maybe this is also lower then you would normally get with your AC settings.

Do you have your FPS capped at 44? Maybe the driver is limiting it while on battery.

No, my FPS is capped at 100, and it's not on battery

the FPS don't stay fixed at 44, it goes up and down depending the part of the track... I tried turning off the AA for example, with the HD4400 it went to 100fps (capped) and with gt840m it was around 70fps Oo

Is there a performance difference if you force the AA settings in the graphics drivers instead of LFS? Do you get the same FPS if you add a full pack of AI drivers in single player mode?

I overlocked the GPU, and got around 4 fps more at LFS, and 20fps more at assetto corsa...




look at the GPU usage @ assetto corsa (but it still says 0mb usage)

I tried now with original clocks, and 19 AI drivers at blackwood, the loss on performance is almost imperceptible (from ~44fps to ~42fps)

If you're getting same performance regardless of the AI drivers on the track it looks like it's the rendering performance that's the bottleneck, not the CPU. I believe that at least on nVidia GPUs you can force "Maximum Performace" mode instead of "Adaptive Mode" which will prevent the GPU from clocking down under light load. It might be interesting to check if that makes any difference.

Quote from MadCatX :

If you're getting same performance regardless of the AI drivers on the track it looks like it's the rendering performance that's the bottleneck, not the CPU. I believe that at least on nVidia GPUs you can force "Maximum Performace" mode instead of "Adaptive Mode" which will prevent the GPU from clocking down under light load. It might be interesting to check if that makes any difference.

I alreadly forced that yesterday

The charts you posted show the GPU clocking up and down though... You can try the same thing with the CPU (http://isboxer.com/wiki/HOWTOisable_CPU_Throttling_in_Windows). Don't forget to switch it back afterwards, otherwise the laptop will draw a lot more power and run quite hot.

I thought that it could be a incompatibility with dx9, since assetto corsa is dx11 and is runing well...

So I downloaded 3dmark06 to use the dx9 benchmark, and it seems that it's just fine, the nvidia inspector says that the gpu was using 100%, not like LFS...

http://www.3dmark.com/3dm06/17698756

LFS doesn't use any decent GPU 100% anyway... Depends of course on settings but 2xAA is nothing.

Here, this is LFS benchmark replay with cfg_max.txt;



Hovers between 40-60% from start-finish. Graphics card don't even get fully clocked.

--
Try Rfactor2 for fun. Also DX9 sim. Rfactor uses the graphics card for 96% in my case when I have sync on the GPU.

Quote from Specht77 :

I thought that it could be a incompatibility with dx9, since assetto corsa is dx11 and is runing well...

So I downloaded 3dmark06 to use the dx9 benchmark, and it seems that it's just fine, the nvidia inspector says that the gpu was using 100%, not like LFS...

http://www.3dmark.com/3dm06/17698756

LFS won't push your GPU to the limit, ~60 % load on the GPU is in fact more than I'd expect. There are lots of possibilities but I'd first try to check that your CPU is not clocking down too aggressively when you're playing LFS.

Quote from MadCatX :

Quote from Specht77 :

I thought that it could be a incompatibility with dx9, since assetto corsa is dx11 and is runing well...

So I downloaded 3dmark06 to use the dx9 benchmark, and it seems that it's just fine, the nvidia inspector says that the gpu was using 100%, not like LFS...

http://www.3dmark.com/3dm06/17698756

LFS won't push your GPU to the limit, ~60 % load on the GPU is in fact more than I'd expect. There are lots of possibilities but I'd first try to check that your CPU is not clocking down too aggressively when you're playing LFS.

I alreadly checked that, as stated at #8 post of this thread

But CPU-Z doesn't display a frequency or P-States statistics, right? There is just one field with current CPU clock in it which refreshes one in a while? This tells you nothing about what the CPU is really doing. A proper test would be to force CPU to run at full speed all the timr and do the tests again. If there is a problem with CPU power management, I'd expect 3DMark 06 and AC to run a bit slower with PM disabled and LFS to run better.

Eehh it shouldn't be this much rocket science. Can you still return that laptop to the store?

(Did you tried different drivers yet? Older maybe. )

Do you have Full screen vertical sync on yes? in misc options,that on my notebook was on yes and had 75 fps nearly,when turned off,it went to 180.

I'm gonna try to return the laptop (not just because of this odd performance, but other problems on the build, like defective spacebar, bad mounted touchpad, etc)


I didn't tried older drivers yet, maybe later today I'm gonna try newer (beta) drivers...


It's really weird how other games and benchmarks use the maximum performance from the laptop, and the LFS doesn't try to get higher FPS...


viraaj, I have vertical sync OFF, and now I also turned FPS limiter OFF (was set to limit at 100fps)



I'm downloading rF2 demo now to test it, is it really dx9?