First off the blocks with machines using the new Intel 80486DX2 was Compaq Computer Corp, which says it is shipping several models in the DeskPro/M and DeskPro/i families, and upgrade boards costing $730 to $2,200 depending on the processor being replaced, and are available for the Systempro servers as well as Deskpros. The Deskpro 66M is claimed to deliver performance up to 35% faster than the 50MHz DX2 models, and is from $4,400 with a 210Mb disk, 8Mb CPU and 256Kb secondary cache. The Deskpro 4/66i starts at $2,800 with the 120Mb disk. IBM Corp later added the PS/2 486DX2-66 processor complex for the PS/2 Models 90 and 95 desktop and server systems at $2,170 to $3,000 depending on CPU, and Dell Computer Corp said it introduced four upgradable models based on the new part: the 486P/66 costs $2,500, 486D/66 at $3,250, the 466DE is $3,900 and 466SE is $5,500, Dell said.