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Samsung 840 Pro/Asus P9X79 Pro=Confusion

thirdeye

thirdeye

Platinum Member
So I've been noticing that my new work desktop with a Samsung 840 Pro is a bit snappier than my home desktop so I figured I'd throw an 840 Pro in my desktop to see how things improve. I originally had an Intel 330 180GB SSD previously.

I decided to benchmark the new SSD and came up with some odd results. Wanted to get some input on them. I used the Samsung migration tool to clone my Intel drive, booted it up and benchmarked the drive in each of the 3 different SATA ports on my motherboard.

System is running Win8 x64 with latest drivers/BIOS that is available via Asus' website.

SSD Cache Ports:
as-ssd-bench%20Samsung%20SSD%20840%20%209.12.2013%208-43-50%20PM.png


Blue SATA III ports:
as-ssd-bench%20Samsung%20SSD%20840%20%209.12.2013%208-58-24%20PM.png


Gray SATA III ports:
as-ssd-bench%20Samsung%20SSD%20840%20%209.12.2013%209-23-32%20PM.png
 
That's what I usually use, I was just confused by the insanely low 4k Write speeds. What prompted all this was my Intel drive barely being able to push 0.4MB/s on that same test. Obviously the Samsung is faster but I'd still think 2.48MB/s is pretty terrible.
 
Based on Asus' spec list, you should probably use the white ports, as those are what are listed as the Intel 6Gbps.
 
The gray ports I'd imagine are the white ones. They just don't really look white. I have a total of 8, 2-gray, 2-gray that have an SSD Caching sticker on them, and 4 blue.
 
Try a different Intel RST driver? Something is wrong. I'm using the same board with a different brand SSD and unless it's a particular P9X79 Pro with Samsung 840 pro problem, you should be getting 40+ easily in that 4K write section. I'm still using the last version of the MB BIOS before the EUFI cap change.
 
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Ok perhaps I'll try that. I'm pretty sure I'm on the latest one at the moment, but I'll check. I'm glad to hear that those results aren't normal though. I'm seeing the same thing on a Samsung 840 (non Pro) and an Intel 330 as well. Lower numbers obviously but always with crazy low 4k write speeds. Hell it takes AS SSD almost 10 minutes to run because of that section alone.
 
So yeah, the RST driver update was the ticket. Thanks for the tip, not sure how I missed it but according these results it made a big difference.

as-ssd-bench%20Samsung%20SSD%20840%20%209.14.2013%209-46-56%20AM.png
 
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