if money is an issue, i would suggest the athlon II x3 or x4. Both are very good CPUs, will run just as well as the Phenom with the 5770, and run cooler. Not to mention a good deal cooler.
the real issue is, will your motherboard run any of these CPUs? Speccy will tell you what mobo you have. then go to the manufacturer web site, look up your model number, and then click on compatible CPUs. http://www.piriform.com/speccy
as for the 5770, any ATI 5770 ver. 2.0 card should work for you. I would avoid the PCI-E 2.1 cards unless your motherboard states it supports that slot. Once again check the web site.
since both the athlon and 5770 run cool (respectively), heat wont be a major issue.
both would be fine even if you have an am2+ mobo a 965 will fit in, you may want to consider a 955 and save some cash, as 200mhz doesn't really effect anything. the 5770 is also a good choice when on a budget pretty good on power heat, and very solid performance
To better assess the value of upgrading either the cpu or the graphics card, try the following experiment:
1) Run your games, but reduce the resolution and eye candy to a minimum. This will simulate what will happen if you upgrade to a stronger graphics card. If your FPS improves, it indicates that your cpu is capable of driving a stronger graphics card to higher levels of FPS.
2) Keeping your graphics resolution and settings the same, reduce your cpu power. Do this by removing the overclock, or by using windows power management to set a maximum cpu% of perhaps 70%. If your FPS drops significantly, it indicates that your current cpu is a limiting factor, and that a faster cpu would help.
Most of the time, a graphics card update, not the CPU is the most cost effective upgrade. This is particularly true if you are gaming at
1920 x 1080 or higher.
As to what cpu your motherboard can handle, run CPU-Z. It will tell you what motherboard you have, what revision #, and what bios. All factors which may determine your possible cpu's. Then go to the Foxconn web site and see what cpu's your particular motherboard can potentially handle. You may need a bios update that can be tricky to do. A failed bios update can permanently brick your motherboard.
A graphics card update will increase the power needs. See if you can find the spcs on your PSU. Every psu should have a spec chart affixed to it. The important number is not the wattage, but the maximum amps for all the 12v rails. If the label is hidden, try to identify the brand and determine how many 6-pin pci-e connectors it has.
Well atm on.. lets say Call Of Duty 5 my pc cant even get a decent frame rate on the lowest resolution. my frame rate on that is 80FPS inside buildings and around 50 when I go outside.
As for CPU-Z the rev. number is 00 and the BIOS is
American Megatrends Inc.
Version : 080014
Hope this helps, as i have no idea what this means.
50FPS is not bad. The typical LCD monitor has a refresh rate of only 60fps. That said, I think the graphics card could use updating. I suggest you do one thing at a time. Who knows, you might find that just the graphics card update is sufficient.