[jaimeyap]

Nice. What build times are you seeing for clean builds of the rust toolchain itself? Curious to benchmark against my 2700x. I'd imagine near linear scaling with the core count.

I think the 3900x might be a happy middle ground. I'm guessing we would probably see (with the increased IPC, core count, and core clock) like 70-80% increases over a 2700x in these kinds of multithreaded workloads. So probably slightly more than half way to a 2970x or 2990wx?

[loeg]

3900x looks fantastic on paper. In general, if the Ryzen stuff is sufficient for your needs, it's a better value. You pay a big premium for the Threadripper boards (and big case and big cooling solution). So in that sense, the 3900x is definitely in a sweet spot at the top of the Ryzen range.

Tradeoffs: threadripper boards officially support ECC; Ryzen boards are hit or miss. TR boards tend to be priced around $300 whereas you can get a Ryzen board for $100ish. TR had (prior generations) twice the DRAM channels and way more PCIe lanes than Ryzen, so if you're doing GPU-intense work or something else with use for lots of PCIe, that's a plus. Not to mention, additional core count over Ryzen, although with greater inter-die latency. Not sure what that will look like with TR3.

Is 3900X worth $500 at list over $400 3800X at list? Actually, yeah, it looks at least 25% better to me (esp. the doubled L3) if you can use the cores. The 3800X is overpriced; they probably are learning from the 1700<->1800 dynamic in gen1. Is it worth it over the 3700X at $330? Maybe not.

For me the question is really, how long will Ryzen 3000 be on the market before those better IPC/clocks/core densities show up in TR3? PCIe 4.0 support is huge; AMD wasn't anemic on PCIe channels on Zen and Zen+, and PCIe 4.0 doubles bandwidth from 3.0. Hopefully those IPC gains do not come attached to Spectre/Meltdown-like vulnerabilities. I'm excited for Zen 3 TR! That might be worth an upgrade from the 1950X. Meanwhile, it doesn't seem like Intel will get to PCIe 4 until 2020 (although that's reasonably soon).

[jaimeyap]

3800X is "gamer priced" :).

I think the 3900x is in a great position to provide the best of both gaming and productivity. Extremely aggressively priced at $500 for the horsepower it seems to give you.

I suspect there is going to be a 16 core 3950x later in the year. Maybe with slightly lower single core frequencies. But maybe 20-25% greater multicore performance.

I bet they are delaying that to keep something up their sleeves when Intel responds. And to not totally cannibalize TR prior to releasing TR3.

[tracker1]

The 570 boards are going to be around $100-200 more expensive though. The PCB is a bit different and the specifications are more tight for PCIe 4. I think the cheapest board you'll see soon will be above $150 at the very low end all the way up to $600 or so. Many of the prior two gens will have issues running the newer CPUs and the board vendors are recommending against Zen2 on chipset boards prior to 570

[drudru11]

Yeah - I wish I didn’t have to go threadripper to get ECC. I don’t need that much power.