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Basically, if you have mostly CPU-bound tasks, it's very wasteful to make far more threads for them than you have cores. You really don't want to be context switching. Data is ideally almost always cached and there's generally enough write buffer that write latency is irrelevant.
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My current workstation is a build from 2016 with a i7-6950X overclocked substantially (4.5GHz), 64GB DDR4 and a Samsung 960 Pro 2TB. I wanted to replace it much earlier with Zen 2 Threadripper but I couldn't get the parts. Kept getting delayed until it made no sense anymore.
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The 10 core i7-6950X is competitive for full build compilation with a 24 core Xeon from the same generation and is substantially better for most incremental builds where it's heavily bottlenecked on a couple threads. It was really good for a couple years but it's awful now.
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When Zen 3 Threadripper comes out, I'll happily pay thousands of dollars to get a 64+ core CPU, nice motherboard and 256GB+ memory to go with it. Could not wait any longer though, and I'll happily turn this into a replacement for my badly aging gaming PC so it won't be wasted.
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Also, for the time being, I'm going to switch to dual booting on this machine while still also using my older workstation. So, I can either have 2 workstations doing builds or I can be doing gaming on this while also switching over regularly to test new builds on the other, etc.
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Threadripper chips are massive with massive power usage and heat spread across the huge die. They need special coolers and you need a really good one to truly take advantage of them. They bypassed chip density limits with die size. It's a massive server CPU but with high clocks.
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