My system is in need of an upgrade. This is what I currently have in it:
Motherboard: Gigabyte EP43-UD3L
CPU: Intel Core 2 Duo E7600 @ ~3.1GHz
CPU Cooler: Thermaltake V1
Video Card: NVIDIA GeForce GTS 450
Primary Drive: Samsung 840 EVO 120GB SSD
Other Hard Drives: Total 8TB Between a WD Black and Red, and a Seagate.
Ram: 4 OCZ OCZ2F8004GK PC2-6400 DDR2 800MHz 2 GB Fatal1ty Edition Dual Channel Kit - 8GB Total Ram
Optical Drive: LG BluRay/HD DVD Combo
HDD Drive Bay
Sound Card
Keyboard: Logitech G510
Mouse: Razer DeathAdder 3.5G
PSU: Apevia 680W
Case: Antec 900
OS: Windows 7 Ultimate x64 SP1
System Rating in Windows:
CPU - 6.6
RAM - 6.6
Graphics - 7.3
Gaming Graphics - 7.3
Primary Drive - 7.3

My motherboard/CPU are socket 775, so that really limits what I can upgrade without building a whole new system, which is out of the question due to money. I have been looking at Core 2 Quad processors in socket 775, but I am having a hard time finding one that is actually better than my Duo since it is clocked at ~3.1GHz. Most of the comparisons are with the Q9000 series, which are hard to find in my price range of ~$50. From what I can tell, my system bottlenecks at the CPU more than anywhere else, especially in BF4.

Those that knew my wife Seksi_Zena and I back before we took off for our son's birth know that money is always an issue due to her various medical problems (she is still kicking and says Hi btw). So, any suggestions?