Hi, so last year I upgraded from a radeon HD5450 512mb to a Asus HD7750 1gb gddr5. It runs well-optimized games great, like Battlefield 3, Bad company 2, Metro Last Light, Skyrim, Minecraft, Far Cry 2, all on ultra-high in the 50-60 fps range.
But I got ArmA 3 and I really like it, unfortunately the optimization for the game is way beyond my graphics card capabilities. I get 10-20 fps on servers, but 60-70 fps on singleplayer with everything on ultra and grass turned off.
What graphics card would you recommend for these specs?
AMD Phenom ii x4 945 3.0GHZ
Asus HD7750 GDDR5
Windows 7 64-bit
8gb ddr3 ram
1tb Hard Drive
Corsair 430 watt psu (I upgraded from a 300-watt craptrap chinese psu, which probably only put out 200 watts. Failed a few times)
I bought this computer from HP so I can't overclock the CPU. GPU overclocking is just fine. Is my system bottlenecking any of my components/GPU? My mom needs a new computer, so I can probably gift her this one and she would slip me some cash to build a new one, but I am trying to hold back, because if I start building then I want a top-of-the-line that should be future-proof for at least another 2-3 years, which would cost me 800-1,500$.
This PC works fine, it runs a standard ATX motherboard, so I should be able to swap out motherboards and be able to overclock, right? There are no more PCI-E slots on my motherboard available except the one that is being used now, so I can't crossfire another graphics card, and ArmA 3 doesn't work with crossfired cards, only on DX9 mode, which is not available in multiplayer, and I would need a new motherboard and PSU.
The problem you might have with 300$ graphics card is that even with your new PSU it might not handle it, 430-Watt isn't that much. What Corsair model do you have exactly? CX I presume?
Given that you play with a very low resolution (1366x768), you could get away with a Radeon 7850 or GTX-650-Ti-"Boost" without having to change your PSU again. This might be your best bet and you'd save money, you wouldn't have to use the full 300$ budget since these two cards sell for around 175$ and they should give you a significant increase in performance. Enough to play Arma 3 smoothly at 1366 x 768 I guess.
If the game still doesn't run well with one of these two cards, getochkn might be right and it could be a CPU bottleneck but I'd be surprised, the 7750 seems like the weak link to me.
If you are getting good FPS on single player and low FPS on multiplayer, your CPU is definitely what is holding you back. In multiplayer, the CPU is stressed a lot more. Graphics typically aren't much different if any at all. That Phenom CPU is actually pretty old and has a relatively low clock speed. Also, at that resolution you really shouldn't need a whole lot more in the graphics department.
I would suggest spending the $300 on a CPU/Motherboard or go ahead with your full system build like you talked about.