What? Not if they're CPU-bound they're not. Look at Dell/HP workstation/servers: Z600/800 | Z620/Z820 range - dual sockets, all of them. The cheaper configs mig

What? Not if they're CPU-bound they're not. Look at Dell/HP workstation/servers: Z600/800 | Z620/Z820 range - dual sockets, all of them. The cheaper configs might only come with one CPU, but they've got two sockets. I'm talking highly-parallelisable code like in renders/raytracers, fluid simulations, image processing. All that stuff needs huge amounts of memory bandwidth. And it's generally parallisable in both threads and with SIMD with SSE/AVX, so you're literally up against the cache/memory throughput limits of the system. Game engines aren't that parallel actually - even job queue based ones which are in theory very scalable have dependencies which means that generally there's a limit to the number of threads they can run at once. The above examples I gave can generally scale linearly, given memory bandwidth.