North Sioux City, South Dakota-based Gateway 2000 Inc has three new 60MHz Pentium processor-based desktop personal computers priced at from $2,500; the lowest-priced comes with 8Mb RAM, 256Kb cache, 424Mb IDE hard drive, PCI local bus graphics adaptor with 2Mb video memory and 14 CrystalScan 1024NI monitor; the mid-priced has double-speed CD ROM drive and 15 CrystalScan 1572FS monitor and the top model adds 16Mb RAM and 540Mb disk; the new P5-66 is a fully loaded 66MHz Pentium processor-based system at $4,000 has 16Mb RAM, 256Kb cache, 540Mb IDE drive, PCI local bus graphics adaptor with 2Mb video memory, 17 CrystalScan 1776LE monitor and double-speed CD-ROM.