AMD M4A785TD-V EVO A/L/V mother board
CPU Athlon II X3 440 3.0 GHz
DDR3 2Gb 1333MHz PC3-10600 Kingston
Sata2 250Gb 7200 rpm Seagate
the resolution in which i play games is 1024 since i have an ati radeon a9600 pro directx 9 in my OLD athlon 64 3000+ 2ghz and 1.5gb ram so its not a good comparison to what resolutions ill be playing with my NEW system
again i was thinking to buy a xfx hd5670 with my new system but people keep telling me to buy a sapphire hd5750 for 26 more dollars
The resolution you game at is dependent on the monitor. If your monitor cannot display higher that 1024x768 (or 1280x1024), then that is the highest resolution you can game at. If this is the case, then the HD5750 would not be worth the extra $26.
However, if you intend to replace the monitor in the near future or the monitor can display higher than 1280x1024, then you should pay the extra $26 for the HD5750.
The cooler designs on those two cards are almost identical, and both will likely be quite sufficient. Both appear to blow air 360-degrees, rather than attempt to channel it in any particular direction(s).