Strange FPS drops in GTA V (not stuttering/lag)

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Lanti

Honorable
Nov 22, 2013
6
0
10,510
I have an Asus N53SV notebook. The specs are:
i7-2630QM @2,00Ghz CPU (4x4)
8GB 1333Mhz Ram
GT540M 1GB GPU
5200RPM HDD

When I start the game, I've got stable 28-30FPS (everything is on minimum at 1600x900 resolution). But when I go massive distances, FPS drops first at 25, then 22, until it reaches 15FPS sometimes. However, when I going back to the menu, stay there a little bit and continue again, FPS climb back to 30. I made a little test. I started the game, FPS at 30. I didn't went enywhere, just stayed in one spot. FPS started to going down until 19-20FPS slowly. Going back to menu, wait a little, then FPS suddenly 30 again... I tried this with all of the antivirus software turned off (Microsoft Security Essentials, Malwarebytes).

I also tried to turn off auto song search feature in game, plus closing wmpnetwork and NvStreamSvc. I setted the Nvidia control panel to "maximum performance". No luck any of these.

Probably not a memory leak issue. GTA5.exe constantly using the same amount of ~2GB ram always and there are plenty of free ram available in the source monitor.

I think there are 3 bottlenech options:
CPU -> Can't keep up, listed below the recommended.
GPU -> Although I managed to stay in the recommended GPU memory range with 50-70mb, it can be slow for this game.
5200RPM HDD -> There are other forums here which suggesting game moving so many files when constantly loading new territories that HDD can effect FPS in this case.

What do you think?

Update:
Game uses 10-15mb/s write data chunks at every second under high load. My 5400RPM HDD capable of 85mb/s writing speed (according to HD Tune Pro benchmark). So probably I don't need an SSD and not the HDD my bottleneck, because game optimized to load from the disk max. 10-15-20mb/s spikes of data.

Update 2:
It can be the HDD. I have two partition (149GB and 446GB installed with the game). When I short-stroking the benchmark test at 149GB, Read speed sometimes drops to 6mb/s, which is much below that sometimes game using. Virtual memory is stored on 149Gb partition also.

Update 3:
When I inspecting with HWmonitor, when the FPS drops, CPU doesn't working on full load, just on half speed. Temps near 94-95Celsius.
 
Solution
First of all, get an SSD or a normal 7200RPM HDD.
Second of all, 95 degrees on a CPU isn't normal, so it's probably throttling itself back.
Third of all that's a laptop, that GPU is not even remotely close to the minimum specs, so that could be the issue as well.

krtshv

Honorable
Sep 26, 2013
41
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10,540
First of all, get an SSD or a normal 7200RPM HDD.
Second of all, 95 degrees on a CPU isn't normal, so it's probably throttling itself back.
Third of all that's a laptop, that GPU is not even remotely close to the minimum specs, so that could be the issue as well.
 
Solution

Lanti

Honorable
Nov 22, 2013
6
0
10,510
The CPU idling at 75-80C and th CPU fan 3500-4000RPM. So probably it's time to re-introduce the thermal paste and clean the dust off. Maybe cutting a big hole in the hottest spot?

The "spaghetti" effect on the CPU performance monitor can be the side effects of the heat problems?
 

Lanti

Honorable
Nov 22, 2013
6
0
10,510


It was overheating issue as you described. When the CPU reaches 85-95°C it will throttling back itself to 1,3-1,6Ghz from the 2Ghz base clock. This is why the first 2-5 minutes of gameplay has stable 30FPS and when it's overhot, the stuttering, fps drop starts which will never goes back.
 
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