NexGen Nx586 P90
NexGen's second design; Nx586. Introducted in 1994 and was meant to compete with the Pentium. The Nx586 does not fit regular Socket 5 and 7 motherboards but requires it's own motherboard.
Performance of the Nx586 was not bad, but the total package didn't create success. Besides the CPU you need a 'special' motherboard and the Nx586 did not have a floating-point-unit (FPU).
AMD acquired NexGen when the K5 didn't meet expectations.