UPGRADING REPAIRING PCs

Intel and Compatible Processor Specifications 25
L1 L2
Level 1 Cache Level 2 Cache Special
Cache Type Cache Speed Features Similar to4 16+8KB WB — Bus FPU Pentium
2x32KB WB — Bus FPU, MMX Pentium MMX
2x32KB WB — Bus FPU, 3DNow Pentium MMX
2x32KB WB 256KB Core FPU, 3DNow Pentium MMX
2x64KB WB 512KB6 1/37 Core FPU, 3DNow Pentium III8 2x64KB WB 256KB Core FPU, 3DNow Pentium III
2x64KB WB 64KB Core FPU, 3DNow Athlon PEC
16KB WB — Bus FPU Pentium
64KB WB — Bus FPU, MMX Pentium MMX
64KB WB 256KB Core
2x16KB WB — Bus FPU Pentium5 2x32KB WB — Bus FPU, MMX Pentium MMX
2x32KB WB — Bus FPU, 3DNow AMD K6-2
2x8KB WB — Bus FPU, MMX Pentium MMX
4. These processors physically fit into the same Socket 7 used by Intel Pentium 75MHz and above
models except as noted, but might require special chipsets or BIOS settings for best operation.
Check with motherboard and chip mfr. before installing them in place of your existing
Pentium-class chip.
5. Pentium-class performance, but unique, non-standard pinout.
6. Cache size for initial shipments (3rd Q 1999). Athlon designed it to allow cache sizes up to
8MB.
7. Athlon’s cache interface is designed to handle variable speed ratios, so later versions can run
L2 cache more quickly.
8. Athlon uses new AMD Slot A, physically similar to Slot 1 but with a different electrical pinout.
9. Duron and “Thunderbird” versions of Athlon use new Socket A.
10. Clock Multipliers listed based on 100MHz system bus (FSB) speeds; although Athlon and
Duron use 200MHz bus, memory for these systems runs at PC100 or PC133 speeds, depending
on the processor model.