The 6450 is actually weaker than the 4650.
yeah, that was a silly idea. first digit is the generation/series, the second number represents the tier (9 being highest) and then the model in that tier is the last two digits, making 7990 the current top of the line
Really interesting stuff . . . I "assumed" that since it had higher RAM, and was 3+ years newer it would be a "better" GPU. Overall not a problem since I do like the HDMI output, and I'm not taxing it by using it as a Media Server (using WMC and XBoxs as extenders), but I definitely wasn't expecting to see a lower score.
As always . . impressed with the knowledge of this forum.