We are pleased to release R16a (version 31.104) update for Sandra 20/21 with further optimisations for hybrid designs (AlderLake, RaptorLake, etc.).
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
- Parallelism: All CPU/Memory Benchmarks
- Additional “Multi-Threaded big/P Cores Only” aka only using threads running on big/P cores (SMT)
- Note that as (current) LITTLE/E Atom cores do not support SMT, there is no corresponding option for them yet
- Cache & Memory Bandwidth Benchmark
- Improved/fixed hybrid bandwidth workload allocation when all cores are used, e.g. on Intel 12600K:
- Memory Bandwidth Improvement: 49GB/s to 56GB/s: +14% improvement (float AVX2/buffered)
- L1D Cache Bandwidth – not affected
- L2 Caches Bandwidth fix: 145GB/s to 836GB/s
- L3 Cache Bandwidth fix: 56GB/s to 452GB/s
- Improved/fixed hybrid bandwidth workload allocation when all cores are used, e.g. on Intel 12600K:
- Cluster Performance Contribution: All CPU Benchmarks
- It is the sum of the performance of all cores in each cluster
- Reveals how much the big/P & LITTLE/E core clusters have contributed compute power wise to each benchmark score in percent, e.g. on Intel 12600K – CPU Arithmetic Benchmark:
- 80% big/P Cluster – 20% LITTLE/E Atom cluster
- Review showing these measurements: big/LITTLE cores Performance Analysis – AlderLake to RaptorLake
- Note this also works on Arm64 big.LITTLE or DynamiQ SoCs
- Core Performance Ratio: All CPU Benchmarks
- It is the ratio of the big/P Core vs. LITTLE/E core performance
- Reveals just how much more performant the big/P Cores are vs. the LITTLE/E cores, e.g. on Intel 12600K – CPU Arithmetic Benchmark:
- 2.15x big/P Core – 1.x LITTLE/E Atom core
- Review showing these measurements: big/LITTLE cores Performance Analysis – AlderLake to RaptorLake
- Note this also works on Arm64 big.LITTLE or DynamiQ SoCs
- Future Hardware Support
- Additional AMD Ryzen 7000 (Zen4) support
- Enabled DDR5 SPD (Hub, PMIC, TS) AMD information
- Additional AMD Ryzen 7000 (Zen4) support
Parallelism Benchmark Thread Combinations
Allows easy benchmarking of all cores/threads together or individually without rebooting into BIOS and disabling cores and/or SMT. The options are as follows:
| Multi-Threading – All Cores/All Threads (big+LITTLE cores, all threads) | 6C+4c / 16T |  |
| Multi-Threading – big/P Cores Threads (big cores’ threads only) | 6C / 12T | |
| Multi-Core – All Cores (big+LITTLE cores) | 6C+4c / 10T | |
| Multi-Core – big/P Cores only | 6C / 6T | |
| Multi-Core – LITTLE/E Atom cores only | 4c / 4t |
Cluster Performance Contribution & Core Performance Ratio
Allows simple reporting of hybrid performance contributions by breaking down the compute contribution of big/P and LITTLE/E clusters and thus the big/P Core : LITTLE/E Atom core performance ratio.
| big/P Cores Threads | 70% | 70/6C -> 2.15x |  |
| LITTLE/E Atom cores threads | 30% | 30/4c -> 1x |
Example of performance contribution & ratio on Intel Core i5 12600K (ADL):
CPU Core Cluster Performance Contribution (per Cluster type)
- Multi-Media Integer Native : 80% big/Cluster – 20% LITTLE/cluster
- Multi-Media Long-int Native : 83% big/Cluster – 17% LITTLE/cluster
- Multi-Media Quad-int Native : 85% big/Cluster – 15% LITTLE/cluster
- Multi-Media Single-float Native : 85% big/Cluster – 15% LITTLE/cluster
- Multi-Media Double-float Native : 85% big/Cluster – 15% LITTLE/cluster
- Multi-Media Quad-float Native : 86% big/Cluster – 14% LITTLE/cluster
Note: Here we sum the compute performance contribution for all cores in the type of cluster. If SMT is enabled, all threads will be summed.
Note2: This feature also works on Arm64 big.LITTLE / DynamicQ SoCs, it is not tied to x86 Intel hybrid systems.
CPU Core Cluster Performance Ratio (per core type)
- Multi-Media Integer Native : 3x big/Core – 1x LITTLE/core
- Multi-Media Long-int Native : 3.1x big/Core – 1x LITTLE/core
- Multi-Media Quad-int Native : 3.2x big/Core – 1x LITTLE/core
- Multi-Media Single-float Native : 3.3x big/Core – 1x LITTLE/core
- Multi-Media Double-float Native : 3.3x big/Core – 1x LITTLE/core
- Multi-Media Quad-float Native : 3.4x big/Core – 1x LITTLE/core
Note: Here we divide the cluster performance contribution by the number of cores in each cluster – and then work out the big/LITTLE ratio. If SMT is enabled or not, we still only count the number of cores per cluster, not threads.
Reviews using Sandra 20/21:
- SiSoftware
- AMD
- AMD Ryzen 9 7950X (Zen4 Raphael) Review & Benchmarks – AVX512 Top-End Domination
- AMD Ryzen 7 7700X (Zen4 Raphael) Review & Benchmarks – AVX512 Mainstream Performance
- AMD Ryzen 5 7600X (Zen4 Raphael) Review & Benchmarks – Value AVX512 Performance
- AMD Ryzen 7 5800X-3D (Zen3 V-Cache) Review & Benchmarks – CPU Performance
- Intel
- AMD
- SiSoftware Official Ranker
Update & Download
Commercial version customers can download the free updates from their software distributor; Lite users please download from your favourite download site.
