What game is it that your playing? and Please give give us your PC specs

Carshateme
Okay, I thought overclocking the card might stop my game from doing this..but it hasn't. I took the card in to get it tested and they said it was fine..but has anyone had this issue before? I would be gaming..It happens mostly when I am PvPing other players..but it also happens sometimes during PvE...but my FPS will go from 80 to 0 and freeze my game up for about 5 seconds...and it'll do it randomly...I look at the performance log and the GPU just drops in it. 

Carshateme, sorry to hear you're experiencing what looks to be performance issues with your system. First thing that comes to mind is to check the stability of your PSU's +12v rail within your BIOS typically under PC Health Status, System Monitor or HW Monitor (some pre-built manufacturers do not include this feature in their BIOS). According to ATX specs, your +12v rail should be between 11.4 ~ 12.6 volts with practically no fluctuations. From time to time you may notice a slight increase or decrease in voltage but no acute drastic drops or spikes as well as erratic fluctuations even if it is within 0.05 volts since this can cause a multitude of odd behavior such as what you're currently experiencing. Keep in mind though that the +12v reading within your system's BIOS is while your PSU is on idle so the fluctuation values may negatively change while under load. To isolate the problem away from any video game, it's also recommend to perform a benchmark test using Valley Benchmark, Heaven Benchmark, 3Dmark 11 or even our very own OC Scanner http://www.evga.com/ocscanner/Default.asp.
 
Let us know if this helps with identifying the main issue and if you have further questions feel free to contact us at 888.881.3842 our tech support is available 24/7.

Carshateme
Tera Online; HP Envy Desktop W/ Intel i5-4300cpu @ 3.00GHz, 12GB ram, 64-bit OS Windows 8, after market power supply @ 600watts.

What 600w psu do you have?  Brand and model would be appreciated.