Saturday, May 23

Geek

Daily News Stuff 22 May 2020

Gluten Free Alphabet Soup Edition

Tech News

  • Putting Amazon's Graviton2 Arm processor through its paces.  (Phoronix)

    A 64 core Epyc beats a 64 core Graviton2 by an average of 51%, though Graviton takes the lead in a number of benchmarks.

    The problem is that in a number of other benchmarks, Graviton gets absolutely creamed.  Epyc is four times faster for NAS operations, five times for OpenSSL, and close to twenty times for PostgreSQL.

    Some of those point to specific optimisation issues - MariaDB doesn't show anything like the problem with PostgreSQL - so if you aren't using those particular applications you won't have those problems.  And if you're on AWS you can easily mix and match.


  • The first benchmarks for Intel's Rocket Lake have leaked unless they haven't.  (WCCFTech)

    Rocket Lake is based on the much improved Sunny Cover architecture rather than are refresh of Skylake.  Compared to the current generation i5-10400, the new chips are...  Oh.  The new chips are -7% faster.

    That doesn't make a lot of sense because Sunny Cove really is a significant upgrade.  More cache, more execution units, wider issue (sort of), new instructions.  And it does perform better on Spec benchmarks.  So probably this is an outlier.


  • AMD is lining up refreshes for the 3700X and 3800X unless they aren't.  (WCCFTech)

    Six months ago their highest-clocked dies were in short supply; now they are plentiful.  So they can probably bump the clock speeds by 100 or 200MHz.


  • AMD is also looking to release a new low-end chipset, the A520.  (Tom's Hardware)

    Really this is more of a chipsetless like the A320.  All Ryzen CPUs and APUs have built-in SATA and USB, so all that is really necessary is something to control the boot process.

    The advantage to this - apart from the price - is that it frees up an extra four PCIe lanes that are normally used to connect the chipset to the CPU.  And it inherently supports PCIe 4.0 because there's no chipset to not support PCIe 4.0.  Though it's up to the motherboard makers whether to build their boards up to PCIe 4.0 spec.


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