


Some have extra onboard components like audio and video. Socket 7 motherboards are available in AT and ATX form factor. Alternative CPUs include products from Cyrix/IBM, AMD, Rise and IDT/Centaur. Socket 7 boards typically support 60 and 66 MHz bus speeds, but many motherboards allow a wider range to support some non-Intel CPUs. Initially the socket was used with "P54C" Pentium CPUs that went to 200 MHz (motherboards from this period typically do not support split rail CPUs), and later the Pentium MMX "P55C" that went to 233 MHz. Socket 7 brings optional "split-rail" voltage support, which is required for CPUs that use a core voltage different than 3.3v IO. Memory controller is 32b wide (486-vintage), severely hampering performance. UM8891 - PCI, ISA, FPM(/EDO?) DRAM, Asynchronous cache.430FX "Triton" - 16 MB/s DMA IDE, PCI 2.0, FPM/EDO DRAM, and pipeline burst synchronous cache options.Some boards use IDE controller chips with known bugs, like CMD640. 430NX "Neptune" - SMP, PCI 2.0, FPM DRAM, Asynchronous cache.Some with OPTi chipsets have VLB slots as well, and some have onboard audio or video. Socket 5 motherboards are built to the AT specification, and typically use PCI and ISA slots. There are also several Intel Pentium Overdrive CPUs that were produced to match Socket 5 options to later Socket 7 CPU clock speeds. The Centaur/IDT Winchip and the AMD K5 are perhaps most well known.

There are several CPUs from companies other than Intel available for Socket 5. This was a die shrink revision of the Pentium and operated at 75-120MHz with a bus speed of 50MHz, 60MHz or 66MHz. Socket 5 was developed for the Pentium "P54C" CPU that operated at 3.3v instead of the original P5's 5.0v.
