Solution:

Slot PC 486 seriES CPU( PGA) Model Intel 80486DX2 / DX4, DX5-133 , 5X86 SERIES PCA-6144S 1961000100 ( Heat Sink only) PCA-6145B 1759202300 ( Fan with Heat sink) PCA-6145L (Optional) Model Intel 75-233 (including MMX series ) AMD K5, K6, Cyrix M1,M2,IDT C6 PCA-6151 1759200100 PCA-6153 (Fan w/ heat sink) PCA-6154 (Accessory) Model Intel 80486DX2 / DX4, DX5-133 , 5X86 SERIES PCM-4823/PCM-4825 1961000140 ( Heat Sink only, Accessory) PCM-4820 1759202300 (Fan with Heat sink) PCA-4824 (Optional) PCM-4862 (Optional) PCM-4865 (Optional) Model Intel 75-233 (Including MMX series), AMD K5, K6 Cyrix M1,M2IDT C6 PCM-5862/L 1759201200 (Fan with Heat sink) PCM-5862E/L (Optional) CPU CPU Model 486SX/DX/DX2/DX4 , 5X86 Intel 75-233 ( Including MMX series), AMD K5,K6, Cyrix M1,M2, Cyrix M1, IDT C6 POS-460 series 1759202300 N/A ( Fan with Heat sink) (Optional) POS-560 N/A 1759201200 POS-562/L N/A (Fan with Heat sink) Model Intel 75-233 (including MMX series) AMD K5, K6 Cyrix M1,M2IDT C6 PCA-6155V 1759200300 PCA-6159 Series (OPTION)