[kllrnohj]

> I think one thing you’re missing is how good Apple’s GPU have become (and will be in 1-2 years).

Not compared to other discreet GPUs they haven't. They are still 5 years behind consoles. The only time mobile ever "catches up" and achieves "console-class" is near the end of a consoles ~5-8 year lifetime.

The performance is superb for mobile, and certainly good enough for integrated (it'd be perfect in something like a macbook air), but it's still getting destroyed by the relatively crappy Radeon Pro 560X in the 2018 MBP.

[m_mueller]

Right, but I figure this could be scaled up with larger dies. Sure, Apple is not yet on eye level with Nvidia & AMD, but given their massive R&D budgets I don’t think that’s for long. Also, AR & VR drives demand for GPU FLOPS/Watt in a tight envelope, which has proven to scale quite well to larger chips in CPUs (see mobile ARM -> Cavium & co.).

[kllrnohj]

Scaling up is one of those easier said than done things. Until Apple actually does it there's no reason to assume they could do it.

Cavium is sort of your proof that scaling is hard. The 32-core ThunderX2 @ 2.2ghz with 56 PCI-E lanes has the same TDP as the 32-core AMD Epyc with 128 PCI-E lanes. And it's slower than the competition from AMD & Intel at comparable power budgets.

[m_mueller]

Sure, Cavium is not yet competitive for compute heavy workloads that make use of vectorization. For everything else, e.g. memory bandwidth bounded algos from what I gathered in benchmarks they are quite competitive. And those kind of workloads are actually quite common in HPC from my POV.