So, can we consider the FX 5900XT a full-functional FX 5900? - Yes! Although NVIDIA's postfix XT sometimes means that a given card is crippled (for example, its memory bus is shortened), in the FX 5900XT it means that the card is equipped with slower memory modules and an updated and simplified PCB. Besides, some cards have their core clock reduced from 400 to 390 MHz, though not all of them, many have a 400 MHz core.



Link: Digit-Life