SiSoftware Sandra 20/21-R15c – Bandwidth Optimisations

We are pleased to release R15c (version 31.100) update for Sandra 20/21 with the following changes:

Sandra 20/21 Press Release

We are releasing a maintenance release that includes various updates and fixes to benchmarks and hardware support.

Please don’t forget to submit benchmark results to the Official SiSoftware Ranker! Many thanks for your continued support.

And please, don’t forget small ISVs (independent software vendors) like ourselves in these very challenging times. Please buy a copy of Sandra if you find our software useful. Your custom means everything to us!

Benchmarks, Hardware Support updates and fixes

  • CUDA GP-GPU Benchmarks
    • Updated CUDA SDK 11.7 with nVidia “Ada” support [GeForce RTX 4090, etc.]
  • Memory Bandwidth Benchmark
    • 3-5% bandwidth increase due to L1D block/prefetch optimisations [e.g. AVX512 AMD Zen4, Intel SRP, future arch.]
  • Memory Latency Benchmark
    • In-Page Random” memory access latency pattern – additional TLB ranges randomisation in addition to the randomisation within each TLB range. Credit Rob Williams @ TechGage – many thanks!
      • Benchmark now fails (does not run at all) if TLB information cannot be detected, e.g. CPU does not report it.
      • This change affects both Data and Code latencies.
    • Note that the other tests “Full Random” and “Sequential” memory access patterns – are *not* affected – as the pattern is not affected by TLB data.
    • It is always recommended to use “2MB/large” pages rather than “4kB/normal” pages in order to minimise “TLB miss” penalties which is the reason for the “in-page random” test. Please see How to enable large/huge memory pages in Windows.
    • Windows currently does not support “1GB/huge” pages (unlike Linux) thus they cannot be used.
  • Cryptography Benchmark
    • 3-5% bandwidth increase due to L1D block/prefetch optimisations [e.g. AVX512-VAES AMD Zen4, Intel SRP, future arch.]
  • Future Hardware Support

    • Additional AMD Ryzen 7000 (Zen4) support
      • Enabled DDR5 & XMP 3.0 SPD AMD information
    • Additional Intel Sapphire Rapids (SRP-X/EX) support
    • Preliminary Intel MeteorLake (MTL) support
    • Preliminary Intel Granite Rapids (GRP-EX) support
      • Enabled DDR5 & XMP 3.0 SPD Intel information

Reviews using Sandra 20/21:

Update & Download

Commercial version customers can download the free updates from their software distributor; Lite users please download from your favourite download site.

Update Wizard

Download Sandra Commercial (Pro/Biz/Eng/Ent)

Download Sandra Lite (Free/Shareware)

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