FSB of Socket 754 Motherboard Chipsets

[SBGTF]

I was comparing some motherboards over at Gigabyte and I found the following listed FSB speeds.

nForce3-250 = 1600MHz FSB
nForce3-150 = 1200MHz FSB
VIA K8T800 = 800MHz FSB

Everything I've seen seems to indicate these three chips perform about the same, so I can't understand the disparity in FSB speeds.

[wayout44]

ATM the hypertransport link (FSB) of an Athlon64 is 800MHz (200MHz x 4).