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I'm using the PCIe slot card version of the Optane 900P as the OS and boot drive and two conventional hard drives for storage (not in RAID config), with a 8700k and an Asus Rog Maximus X Hero motherboard.
In the bios, I have two options for SATA Mode selection :
- AHCI
- Intel RST Premium With Intel Optane System Acceleration (RAID)
Is there any performance difference between the two? When I installed the OS (Win 10) it was set up on default setting AHCI, could I still switch to RST if that offers tangible performance benefits, or would I have to wipe the Optane and install Windows anew?
I've noticed that the https://www.computerbase.de/2017-11/intel-optane-ssd-900p-test/2/# diagramm-as-ssd-benchmark-4k-64thrd Computerbase Benchmark with AS SSD produces a vastly better performance for 4k-64Thrd read score:
This is how my Optane does in comparison:
Strangely, the write score is better on my Optane, but overall score is still significantly lower. Of course the Computerbase benchmark did bench the Optane as a secondary drive, not as the OS drive, so that might figure in.
The other benchmark graphic of the AS SSD benchmark mentions "Ram Caching!", so I assume that has something to do with the vastly improved read performance? How do I enable that - or should I? What are the benefits?
Another AS SSD benchmark on http://www.thessdreview.com/our-reviews/intel-optane-ssd-900p-review-480gb-understanding-disruptive-technology/4/http:// SSD Reviews shows a benchmark very similar to mine, just a tad bit faster in every score though:
Finally, the Computerbase CrystalDiskMark score on the empty Optane
performs better in every category, but way worse than mine in 4KiB Q8T8.
-----------------------------------------------------------------------
CrystalDiskMark 6.0.0 x64 (C) 2007-2017 hiyohiyo
Crystal Dew World : https://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes
Sequential Read (Q= 32,T= 1) : 2684.577 MB/s
Sequential Write (Q= 32,T= 1) : 2258.161 MB/s
Random Read 4KiB (Q= 8,T= 8) : 2347.825 MB/s [ 573199.5 IOPS]
Random Write 4KiB (Q= 8,T= 8) : 2214.870 MB/s [ 540739.7 IOPS]
Random Read 4KiB (Q= 32,T= 1) : 682.370 MB/s [ 166594.2 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 616.936 MB/s [ 150619.1 IOPS]
Random Read 4KiB (Q= 1,T= 1) : 277.560 MB/s [ 67763.7 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 241.043 MB/s [ 58848.4 IOPS]
Test : 1024 MiB [C: 8.8% (39.1/446.5 GiB)] (x3) [Interval=5 sec]
Date : 2018/01/04 2:16:25
OS : Windows 10 Professional [10.0 Build 16299] (x64)
Bottom line: Did I miss a setting to improve performance in either BIOS or Win10? Can - and should I switch from AHCI to RST in the Bios, given that I use the 900P as a systems drive and two hdds not in raid as storage?
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Hello VoxPopulist,
Thanks for posting in our community.
There are no performance differences between AHCI and Intel RST Premium With Intel Optane System Acceleration ( simply referred as RAID on older motherboards) modes. As the name suggests, RAID mode is used if you want to set a RAID volume using Intel® Rapid Storage Technologies (Intel® RST). Usually, and OS reinstallation is required when changing modes.
As for the benchmarks from the site you shared, they say the following about 4K-64Thrd: "This has nothing to do with the performance of the SSD. The values are therefore not included in the overall ranking." , meaning these results should't be considered for performance.
Please refer to the official Performance information on the product specification site, focusing on the sequential write/read results:
- https://ark.intel.com/products/123628/Intel-Optane-SSD-900P-Series-280GB-12-Height-PCIe-x4-20nm-3D-XPoint Intel® Optane™ SSD 900P Series Product Specification
Based on this, your drive shows excellent performance in both AS SSD Benchmark* and CrystalDiskMark*. We don't recommend changing any settings as it is. However, there's an evaluation guide available with recommendations to obtain better results for benchmarking if you want to check it:
- https://www.intel.com/content/dam/support/us/en/documents/memory-and-storage/IntelOptaneSSD_900P_SeriesEvalGuide.PDF Intel® Optane™ SSD 900P Series Evaluation Guide
I hope this information will be useful for you. Please let us know if there's anything else we can help you with.
Best regards,
Eugenio F.
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Hello VoxPopulist,
We haven't heard from you since the creation of the post. Please let us know if there's anything else we can help you with.
Best regards,
Eugenio F.
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