I get this card through Amazon to replace my ATI X1550 pro that be in my desktop previously to get the full gaming experience from my desktop and notice a difference right away . my pc 's processor be not nearly work as hard , when I go into the system 's option on doom iii the auto adjust go from high Quality to Ultra High Quality without batting a eye , and the graphic seem more life like like than it do before with alot more detail . I have decide rename my card to ATI 's bavc3850hd -lrb- big -- Video Card 3850 hd -rrb- with emphasis on the `` a '' due to the size witch be at least 5 inch bigger than my ATI x1550 , my case be able to seat with no problem but would not try put this baby in anything less than a full size atx tower due to it be size . need two 4 ide pin power plug that will fit into a adapter that then plug into the card itself to power it . atus say the minimum be a 450w psu but I would use at least a 500w psu -lrb- Mine be a raidmax 630w -rrb- . I do not bother with the driver cd that come with it but instead download they from -lrb- ... -rrb- along with the 8.12 patch for VISTA and before swap card I have remove all the previous driver , load the driver in Windows xp the process take about 2 min in Windows VISTA it take about 20 min -lrb- this include the 8.12 patch -rrb- when do it do look great , just take alot longer to load in VISTA . overall , a excellent card and well worth the upgrade but as most reviewer have mention this will most likely be agp 's last solid upgrade before ride off into the sunset , as of this write ATI be the last Video Card company to make agp card but I doubt they will for much longer since all mobo manufacture have turn over to pcie , they will probably all but be go by 2011 . this last upgrade will at least give I another year or two before I have to replace my aging base INTEL 865 PERLK Desktop -lrb- I have originally build in September of 2003 -rrb- . System Specs : p4 3.4 ghz socket 478 , 1 mb cache processor INTEL 865 PERLK mobo 4gb of ddr1 400mhz pc3200 RAM 680W PSU 300GB IDE hdd 24bit 5.1 Creative Sound Card Edimax Wi-Fi Card 1gb intergrate Intel NIC ATI Radeon HD 3850 AGP -lrb- replace ATI Radeon x1550 -rrb- Windows 7 Ultimate sp1 -lrb- 32 bit -rrb- Update March 29th , 2011 : I have pass this pc rig to my Son with the above system specification as above and it still play almost about 90 % of the game out there with excellent gaming quality . the Windows 7 index give this card a 7.0 -lrb- out of 7.9 -rrb- for performance . it be amazing the longevity this card have give this old rig . Update July 13th , 2012 this rig have now be pass on to my daughter -lrb- my son get a new desktop for Christmas of 2011 -rrb- and still work like champ with this card , I have now have this desktop total of 9 year and work great . never think it would last this long !