Games used to run smoothly.

[Shlouski]

Well if you're going to post BS saying a better card could be used withe less power than you need too back up your "opinion."

Wow, you have really taken this to heart, I was obviously trying being polite and tactful with you, but this appears to have been completely lost on you. I really hate what some people turn into when they behind a keyboard, no manners at all with a complete inability to hold a civil conversation. I hope for your sake you are not like this in real life.

Anyway

Now its hard to recommend a card for you tngfan as don't know your budget, but I guess you will need a cheap low powered card.
Now a reason I don't recommend the 8800gtx for starters is because of the age, cards don't last forever, it would be like buying a very old car with very high milage, but its up to you if you want to take that gamble.
Now here's an example: the 8800gtx has a tdp of about 150 watts, about 50% more power than a 5 year old gts 450 uses and the gts 450 performs better, so in a nut shell, an old low powered card from 5 years ago beats a 8800gtx. This is all fact that can be confirmed with a quick google, plz don't take my word on it. To be honest tngfan any new card you buy will most likely be bottle necked by the rest of your system, so you wouldn't be able to get the best out of a new card until you upgraded. From what I can see an R7 240 has around the same performance as a 8800gtx and are dirt cheap brand new, any card better than a r7 240, will destroy an 8800gtx. Also consider that an r7 240 has a tdp of about 30 watts and a 8800gtx uses over 400% more power, so yes agent smith I stand by what I said before.
For now I'm not recommending any card without more information from tngfan.

 

[Jiniix]

Erhm
8800 GTX:
Estimated wattage: 155W
Bit bus: 384-bit
Memory Bandwith: 86.400MB/s
Texel Rate: 36.800MB/s
Pixel Rate: 13.800Mpixels/s

GTS 450:
Estimated wattage: 106W
Bit bus: 128-bit
Memory Bandwith: 57.728MB/s
Texel Rate: 25.056MB/s
Pixel Rate: 12.528Mpixels/s

These are facts, mate. Not incomparable clock speeds.
In case they don't make sense to you, here's what they mean: If you turn down all visual settings, they'll do about the same. Turn on AA or something, 8800 GTX destroys the GTS 450.
Also, the R7 240 is a rebadge of the HD 6670, which you would undoubtedly find cheaper.

 

[Shlouski]

Erhm
8800 GTX:
Estimated wattage: 155W
Bit bus: 384-bit
Memory Bandwith: 86.400MB/s
Texel Rate: 36.800MB/s
Pixel Rate: 13.800Mpixels/s

GTS 450:
Estimated wattage: 106W
Bit bus: 128-bit
Memory Bandwith: 57.728MB/s
Texel Rate: 25.056MB/s
Pixel Rate: 12.528Mpixels/s

These are facts, mate. Not incomparable clock speeds.
In case they don't make sense to you, here's what they mean: If you turn down all visual settings, they'll do about the same. Turn on AA or something, 8800 GTX destroys the GTS 450.
Also, the R7 240 is a rebadge of the HD 7450, which is a direct rebadge of the HD 6450, which - again - is a direct rebadge of the HD 5450. (My XFX 5450 literally shows up in Windows as a 7450)

Those number are facts, but they don't take into account the different architectures, here's just one of many examples I could find, even with AA on the 450 most of the time still wins, scoll down to the charts: http://forums.evga.com/RMA-Replaced-my-8800-GTX-with-a-450-GTS-m1019417.aspx