Notable IA-32 CPUs Not Supporting SSE2
SSE2 is an extension of the IA-32 architecture. Therefore any architecture that does not support IA-32 does not support SSE2. x86-64 CPUs all implement IA-32. All known x86-64 CPUs also implement SSE2. Since IA-32 predates SSE2, early IA-32 CPUs did not implement it. SSE2 and the other SIMD instruction sets were intended primarily to improve CPU support for realtime graphics, notably gaming. A CPU that is not marketed for this purpose or that has an alternative SIMD instruction set has no need for SSE2.
The following CPUs implemented IA-32 after SSE2 was developed, but did not implement SSE2:
- AMD CPUs prior to Athlon 64, including all Socket A-based CPUs
- Intel CPUs prior to Pentium 4
- VIA C3
- Transmeta Crusoe
Read more about this topic: SSE2
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