Dimension 4700 PC w/19in LCD, 40GB SATA, P4 2.8ghz $549

Dell SB has an "Outragous deal" on the

Dimension 4700 PC w/19in LCD

w/ P4 550 HT (2,8GHz, 800 FSB), 256MB Dual Channel DDR2, 40GB SATA ,CD-Rom Drive, Integrated Intel Extreme Graphics,

19 inch E193FP Analog Flat Panel

for $549 after $100 MIR
with free ship

Is that a p4 550, or a p4 2.8ghz? A 550 is 3.4ghz, quite more than 2.8.