Computer Help Please

I think the only thing that you need to upgrade is your graphic card, and Nv GTX 650 @ ~100USD or GTX 650 ti @~130USD would be a good choice for you. Here are the comparisons:

The GeForce GTX 650 features core speeds of 1058 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 memory. It features 384 SPUs as well as 32 Texture Address Units and 16 ROPs.Compare those specifications to the GeForce GTX 650 Ti, which uses a 28 nm design. nVidia has clocked the core frequency at 928 MHz. The GDDR5 memory is set to run at a speed of 1350 MHz on this card. It features 768 SPUs along with 64 TAUs and 16 ROPs.(No game benchmarks for this combination yet.)
[h=2]Power Usage and Theoretical Benchmarks[/h][h=3]Power Consumption (Max TDP)[/h][TABLE="class: benchmark, width: 600"]
[TR]
[TD]GeForce GTX 650[/TD]
[TD="width: 300"][/TD]
[TD="width: 200"]64 Watts[/TD]
[/TR]
[TR]
[TD="width: 250"]GeForce GTX 650 Ti[/TD]
[TD="width: 300"][/TD]
[TD="width: 200"]110 Watts[/TD]
[/TR]
[TR]
[TD="width: 250"][/TD]
[TD="width: 300"]Difference: 46 Watts (72%)[/TD]
[TD="width: 200"][/TD]
[/TR]
[/TABLE]
[h=3]Memory Bandwidth[/h]Performance-wise, the GeForce GTX 650 Ti should in theory be a small bit superior to the GeForce GTX 650 in general. (explain)
[TABLE="class: benchmark, width: 600"]
[TR]
[TD]GeForce GTX 650 Ti[/TD]
[TD="width: 300"][/TD]
[TD="width: 200"]86400 MB/sec[/TD]
[/TR]
[TR]
[TD="width: 250"]GeForce GTX 650[/TD]
[TD="width: 300"][/TD]
[TD="width: 200"]80000 MB/sec[/TD]
[/TR]
[TR]
[TD="width: 250"][/TD]
[TD="width: 300"]Difference: 6400 (8%)[/TD]
[TD="width: 200"][/TD]
[/TR]
[/TABLE]
[h=3]Texel Rate[/h]The GeForce GTX 650 Ti is a lot (about 75%) faster with regards to texture filtering than the GeForce GTX 650. (explain)[TABLE="class: benchmark, width: 600"]
[TR]
[TD]GeForce GTX 650 Ti[/TD]
[TD="width: 300"][/TD]
[TD="width: 200"]59392 Mtexels/sec[/TD]
[/TR]
[TR]
[TD="width: 250"]GeForce GTX 650[/TD]
[TD="width: 300"][/TD]
[TD="width: 200"]33856 Mtexels/sec[/TD]
[/TR]
[TR]
[TD="width: 250"][/TD]
[TD="width: 300"]Difference: 25536 (75%)[/TD]
[TD="width: 200"][/TD]
[/TR]
[/TABLE]
[h=3]Pixel Rate[/h]If running with a high resolution is important to you, then the GeForce GTX 650 is the winner, but it probably won't make a huge difference. (explain)[TABLE="class: benchmark, width: 600"]
[TR]
[TD]GeForce GTX 650[/TD]
[TD="width: 300"][/TD]
[TD="width: 200"]16928 Mpixels/sec[/TD]
[/TR]
[TR]
[TD="width: 250"]GeForce GTX 650 Ti[/TD]
[TD="width: 300"][/TD]
[TD="width: 200"]14848 Mpixels/sec[/TD]
[/TR]
[TR]
[TD="width: 250"][/TD]
[TD="width: 300"]Difference: 2080 (14%)[/TD]
[TD="width: 200"][/TD]
[/TR]
[/TABLE]
Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.


[h=1]Specifications[/h][TABLE="class: specTable, width: 100%"]
[TR]
[TH]Model[/TH]
[TD]GeForce GTX 650[/TD]
[TD]GeForce GTX 650 Ti[/TD]
[/TR]
[TR]
[TH]Manufacturer[/TH]
[TD]nVidia[/TD]
[TD]nVidia[/TD]
[/TR]
[TR]
[TH]Year[/TH]
[TD]September 2012[/TD]
[TD]October 2012[/TD]
[/TR]
[TR]
[TH]Code Name[/TH]
[TD]GK107[/TD]
[TD]GK106[/TD]
[/TR]
[TR]
[TH]Fab Process[/TH]
[TD]28 nm[/TD]
[TD]28 nm[/TD]
[/TR]
[TR]
[TH]Bus[/TH]
[TD]PCIe 3.0 x16[/TD]
[TD]PCIe 3.0 x16[/TD]
[/TR]
[TR]
[TH]Memory[/TH]
[TD]2048 MB[/TD]
[TD]1024 MB[/TD]
[/TR]
[TR]
[TH]Core Speed[/TH]
[TD]1058 MHz[/TD]
[TD]928 MHz[/TD]
[/TR]
[TR]
[TH]Shader Speed[/TH]
[TD]1058 MHz[/TD]
[TD]928 MHz[/TD]
[/TR]
[TR]
[TH]Memory Speed[/TH]
[TD]1250 MHz (5000 MHz effective)[/TD]
[TD]1350 MHz (5400 MHz effective)[/TD]
[/TR]
[TR]
[TH]Unified Shaders[/TH]
[TD]384[/TD]
[TD]768[/TD]
[/TR]
[TR]
[TH]Texture Mapping Units[/TH]
[TD]32[/TD]
[TD]64[/TD]
[/TR]
[TR]
[TH]Render Output Units[/TH]
[TD]16[/TD]
[TD]16[/TD]
[/TR]
[TR]
[TH]Bus Type[/TH]
[TD]GDDR5[/TD]
[TD]GDDR5[/TD]
[/TR]
[TR]
[TH]Bus Width[/TH]
[TD]128-bit[/TD]
[TD]128-bit[/TD]
[/TR]
[TR]
[TH]DirectX Version[/TH]
[TD]DirectX 11.1[/TD]
[TD]DirectX 11.1[/TD]
[/TR]
[TR]
[TH]OpenGL Version[/TH]
[TD]OpenGL 4.3[/TD]
[TD]OpenGL 4.3[/TD]
[/TR]
[TR]
[TH]Power (Max TDP)[/TH]
[TD]64 watts[/TD]
[TD]110 watts[/TD]
[/TR]
[TR]
[TH]Shader Model[/TH]
[TD]5.0[/TD]
[TD]5.0[/TD]
[/TR]
[TR]
[TH]Bandwidth[/TH]
[TD]80000 MB/sec[/TD]
[TD]86400 MB/sec[/TD]
[/TR]
[TR]
[TH]Texel Rate[/TH]
[TD]33856 Mtexels/sec[/TD]
[TD]59392 Mtexels/sec[/TD]
[/TR]
[TR]
[TH]Pixel Rate[/TH]
[TD]16928 Mpixels/sec[/TD]
[TD]14848 Mpixels/sec[/TD]
[/TR]
[/TABLE]

Source: http://www.hwcompare.com/13623/geforce-gtx-650-vs-geforce-gtx-650-ti/#comments

Hope these information are helpful for you: )

 

Mine is:

Intel Core i3
Biostar Motherboard
8Gb RAM
3 TB total hard drives (1x1TB & 1x2TB )
Windows 8 x64
Zogis GTX660 (Zogis is the Nvidia)
Generic case and cooling system.

So far I haven't had much problem playing:
Battelfield 3/4
GTA IV
L4D2
Arkham Origins
Devil May Cry 4
DMC Devil May Cry
Dishonored


I think GTX 660 if the least you can try on the Nvidia side. But if can, get a GTX 770. I'm thinking of upgrading to it this year. Or maybe chaging the whole PC to AMD.

 

First decide on the resolution you will be playing. Then look around on review websites about those particular game's fps on various graphics cards. Finally decide on the card. Sometimes a 5% fps increase is not worth spending $200 more. Dont forget power hogging cards that warrant high powered PSU's. Hope this helps ...

 

It makes me so happy that everyone, and I mean EVERYONE has chipped in to help me here. It means so much. I know what I need to do now, and just need to get the money together...