Hello, I want to upgrade my cpu, but I am not sure which one I should go with or which one will work. I want to spend about 140 to 180 dollars on it. below are my comp specs. Hp pavilion a1650e CTO current cpu: AMD athlon 64 x2 4600+ Codename Windsor Brand ID: 4 Package: socket AM2 (940)\ Technology 90nm - Core VID: 1.100v family: F Model B: stepping: 2 Revision BH-FH2 Main board: Asustek Computer Inc. Model: NODUS3 Chipset: Nvidia Geforce 6150 Rev. A2 Southbridge: Nvidia nforce4 410/430 MCP LPCIO: SMSC Graphic Interface PCI- Express Memory Type 2 DDR2 Size 2048 Mbytes will be upgrading to 4gbs Channel # Dual Timings DRam Freq. 200.4 Mhz FSB: DRam CPU/5 PSU: Hippro Model: D3057F3R DC output +5v = 25a +12v=19a +3.3v=18a -12v+0.8a Max Power output 300w If I have to upgrade my PSU thats fine. I am just worried about getting the best cpu for the the amount stated above. Thanks in advance.