Its 256g mb... agp 4x/8x and ddr3 memory. However I installed it and when i turn my computer on the montior idles... IT IS GIVING ME NO SIGNAL AT ALL.(meaning the light goes from green to orange) I have the slot for the card, an ultra- 500 watt power supply with 12v/26A my latest bios updates installed... Used a driver cleaner cleaned all my drivers.. and still its not working.. thought it was a defective card but got a new one and its doing the same thing. I have a dell dimension 8200 (which i recently upgraded the power supply...) any ideas on whats causing this issue? my previous card was an ati radeon 9800pro 128mb which whats in now cuz its the only card that works at the moment... please help