The AMD Am486 DX4-100 (A80486DX4-100SV8B) is a vintage 100 MHz microprocessor that features 8 KB of L1 cache. This specific "SV8B" model is highly regarded among retrocomputing enthusiasts for its "Write-Back" (WB) cache capability, which delivers faster memory access than standard "Write-Through" (WT) models. For Socket 3 motherboards. 

I have bought this cpu in a joblot of vintage pc parts. I have been holding on to this cpu in the hope of obtaining a suitable motherboard to test it, but have not been able to find a motherboard at a good price, so I have decided to sell it. As this cpu is untested, I do not know if it works, but I will accept returns. Please ensure that your motherboard is compatible with this cpu as it will only work in specific motherboards. Also, the voltage jumpers must be set so the cpu gets the correct voltage. 

I did have two of these AMD Am486 DX4-100 cpus and have recently sold one of them. The buyer has confirmed that the other cpu works.