Pc lagging while playing GTA V

[Martin9744]

Everytime I play GTA my pc starts lagging when I alt-tab. My firefox laggs, everything laggs. I dont lag ingame tho. This is where the problem is I think: http://i.imgur.com/bGvIHje.png
It goes up to 90% when I've played the game for like 30min, here I just started the game.
It doesnt matter if I close firefox and other programs, its all GTA...

Here are my specs:
Motherboard: ASUS Maximus VII Formula, Socket-1150
CPU: Intel Core i7-4790K
GPU: Gigabyte GeForce G1 GAMING GTX 980 4GB
SSD: Samsung SSD 850PRO 256GB (got 80 more gigs available, so its not full)
power supplement: Cooler Master Silent Pro Gold 800W PSU
RAM: Corsair Vengeance DDR3 1600MHz 8GB CL9
Kit w/2x 4GB XMS3 modules, CL9-9-9-24, 1.5V, Venge

Do I need more RAM, is it overheating, my cpu?? I have no idea!

Thanks for help! 😀

 

[mrmez]

Shouldn't happen and I'm not sure ram is the issue. I play @ 1080 with 8Gb, and never have an issue multi tasking. I don't usually have much going on in the background though.
CPU is more than capable.
Could be VRAM. Check usage in GTA settings. The game might be using so much that none is left over for multitasking.
Maybe turn down some of the advanced options which can chew vram and try again.

 

[boju]

I played GTA5 a lot on a 2600k @ 4.5 16 GB memory, 780GTX and Samsung SSD Win7 (lean background services) and yes GTA5 is a resource hog, i try not to alt tab too much.. mrmez might be onto something there, there might be some setting in GTA5 that causes this but i couldn't be bothered tbh. I can still alt tab for a bit but annoying.

I haven' tried but maybe try setting priority below normal for GTA5, if it doesn't affect performance in game much that is, it might improve while tabbed.

 

[Martin9744]

Shouldn't happen and I'm not sure ram is the issue. I play @ 1080 with 8Gb, and never have an issue multi tasking. I don't usually have much going on in the background though.
CPU is more than capable.
Could be VRAM. Check usage in GTA settings. The game might be using so much that none is left over for multitasking.
Maybe turn down some of the advanced options which can chew vram and try again.

It says in the settings that Im using 2000/4000~~ VRAM. so that shouldnt be a problem..

 

[dudeman509]

GTA V is a memory hog. Is there a flurry of disk activity when you alt-tab back?

FWIW, I upgraded to 16 GB RAM for different reasons (editing applications), but did notice that coming back from GTAV to my desktop improved significantly, despite also having a SSD in my system.

 

[Martin9744]

So you think I need 16gb ram then?

 

[dudeman509]

Open performance monitor or look at the disk activity light when you alt-tab back and see if there is a flurry of disk activity.