Core issues

Keeping your cores straight isn't easy these days.  Here's a quick cheat sheet.

CUDA core - Not a core
Shader multiprocessor - Might be a core
Stream processor - Not a core
SIMD engine - Kind of a core
Turbo Core - Neither a core nor a turbo
Turbo Boost - Not a turbo, but a boost
Core Duo - Two cores
Core 2 - Also two cores
Core 2 Quad - Four cores
Core i3 - Two cores
Core i5 - Two or four cores
Core i7 - Four or six cores
Core microarchitecture - Not a core, but includes multiple cores and microarchitectures

Tip: You can use the A/Z keys to walk threads.
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