can someone explain this to me. i bought an ati radeon 9800xt 256mb ram that has only a 128bit memory bus. does this sound right. all programs i use identify the card as a 9800xt. default speeds are 392 core and 243ddr mem. what gives. the card was new. was there ever a model that was made with only 128bit mem. bus? i only paid $75.00 for it and used a gift cert that i got from my job on amazon. not a huge deal as it is a big step up from a 9600se. just kind of wondering about the specs. overclocked the core to stock 9800xt speeds no problem. the memory only goes to 283 before it artifacts. thanks in advance for any answers to this question.