The AM2+ motherboards are just motherboards that provide easy support for quads while AMD transitions to the AM3s. I'm sure they haven't yet worked out the kinks on these higher HT speeds. But I would love to see what a phenom can do paired with a much higher HT speed, not sure if its going to be a mega performance increase but it could be significant.
Hello. I am confused. I look at the AMD phenom but there's some CPU that have 4000mhz, 3800mhz but then all the motherboards I see only support up to 2600mhz? What's happening?
The discrepancy is that HyperTransport is a DDR interface and that some vendors cite the link clock speed and some cite the effective data rate. The full HT 3.0 spec is for a clock speed of 2600 MHz DDR, giving an effective data rate of 5200 MT/sec. The fastest Phenom has a 2000 MHz DDR HT link for an effective 4000 MT/sec.
A single 16-bit HyperTransport link has 2 unidirectional channels. The clock rate (MHz) is 'doubled' per clock cycle (like DDR ram - 'double data rate'). It is not uncommon to see something like 5,200MHz (2,600MHz x 2) when 5,200MT/s would be correct.
MT/s stands for Mega Transfers per Second, or millions of transfers per second