UMC U5S-SUPER33 GREEN CPU 33MHz
One of the most obscure 486 processors
Does not contain an FPU, and pin compatible with Intel 486SX
Advanced 600nm technology back in 1994
Standard 5V supply
8Kb L1 write through cache
UMC was sued by Intel in 1994 for patent infringement,
therefore these CPUs were not allowed to the U.S. market
Outperforms 50MHz Intel 486 thanks to optimised microcode
Tested by booting to DOS and running Speedsys, but selling as is
The CPU shown in the photos is exactly what you'll receive
The last screen shot shows Intel 486SX just for reference
The Fine Print
Vintage electronics comes with no warranty expressed or implied, and no returns.
Functionality is not guaranteed even if tested working.
If it isn't mentioned in the item description, it isn't included.
If in doubt for any reason, please ask before bidding, not after.
The default mailing option is registered small packet.
Combined postage available, just ask.
Delivery time is about 2 weeks to Europe, 3 weeks to the U.S.
If you intend to purchase several items or items from different auctions, please send me a message before paying.
If you are displeased with your purchase for any reason, please let me know first before leaving feedback.