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SATA 3 SSD max speed 350mb/s??

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May 14, 2013 10:53:39 AM

I have a Asus Crosshair IV formula board, which has:
6 xSATA 6.0 Gb/s ports Support RAID 0,1,5,10

And i recently bought a Sandisk Ultra Plus 256gb SSD to use for my boot disk, and it has support for 530MB/s reads and 445MB/s writes, and of course this is a SATA 3 SSD.

Everytime I run a benchmark, it cant exceed anything over 350mb/s.

Same SSD (not mine):


My performance:
a b G Storage
May 14, 2013 11:15:01 AM

Did you set the SATA mode in your BIOS to AHCI? Are you using latest drivers? Did you check for any firmware updates for your SSD? Also, make sure no other applications that may have disk activities run at the same time of the benchmark.
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May 14, 2013 11:26:28 AM

MC_K7 said:
Did you set the SATA mode in your BIOS to AHCI? Are you using latest drivers? Did you check for any firmware updates for your SSD? Also, make sure no other applications that may have disk activities run at the same time of the benchmark.



Okay so I have read somewhere that setting it to AHCI helps, my problem was that as soon as i switched it from IDE to AHCI windows wouldnt boot so I switched back, I found a post that told me to change 2 values in regedit, and then it booted into AHCI.

Here are my new results on AHCI:


But they still look a little slower than someone else with the same SSD, is there anything I didnt do?
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a b G Storage
May 14, 2013 12:30:59 PM

Burlaka47 said:
But they still look a little slower than someone else with the same SSD, is there anything I didnt do?


Is there a new firmware available for your SSD? Are your drivers all up to date?

Did you by any chance installed Intel Rapid Storage? I heard it can slow down some SSD.

Did you make sure no other software that could trigger disk activities were running?

But in any case, your numbers look good, don't think you'd see much difference in day-to-day use even if you could improve this benchmark by a few points. Maybe the other person had a better optimized system and OS or maybe more RAM and a better CPU etc...
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a c 523 G Storage
May 14, 2013 12:40:45 PM

Burlaka47 said:
Here are my new results on AHCI:
But they still look a little slower than someone else with the same SSD, is there anything I didnt do?


Does that someone else have the same motherboard/chipset that you do?
Intel SATA 3 (6Gb/s) ports have slightly better performance than AMD SATA 3 (6Gb/s) ports.

Also FYI, here's a link to AMD's latest AHCI drivers. Install them if you haven't already. They might give you better performance. http://support.amd.com/us/gpudownload/windows/Pages/rai...

Also, sometimes connecting your SSD to the 1st SATA port on your motherboard gives better performance. Connect your SSD to port SATA1 if it is not there already. See page 2-32 of your motherboard manual for the location of the port.


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May 14, 2013 2:18:23 PM

MC_K7 said:
Burlaka47 said:
But they still look a little slower than someone else with the same SSD, is there anything I didnt do?


Is there a new firmware available for your SSD? Are your drivers all up to date?

Did you by any chance installed Intel Rapid Storage? I heard it can slow down some SSD.

Did you make sure no other software that could trigger disk activities were running?

But in any case, your numbers look good, don't think you'd see much difference in day-to-day use even if you could improve this benchmark by a few points. Maybe the other person had a better optimized system and OS or maybe more RAM and a better CPU etc...


I just finished updating the SSD firmware. I cant say anythings changed, but maybe time will tell.
And I dont think so, I run the test as soon as I boot, with no extra programs on start-up.
Im definitely not complaining about the speed, Just thought I must have had the wrong settings or something for it since I get slower performance then someone else.
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May 14, 2013 2:28:08 PM

Dereck47 said:
Burlaka47 said:
Here are my new results on AHCI:
But they still look a little slower than someone else with the same SSD, is there anything I didnt do?


Does that someone else have the same motherboard/chipset that you do?
Intel SATA 3 (6Gb/s) ports have slightly better performance than AMD SATA 3 (6Gb/s) ports.

Also FYI, here's a link to AMD's latest AHCI drivers. Install them if you haven't already. They might give you better performance. http://support.amd.com/us/gpudownload/windows/Pages/rai...

Also, sometimes connecting your SSD to the 1st SATA port on your motherboard gives better performance. Connect your SSD to port SATA1 if it is not there already. See page 2-32 of your motherboard manual for the location of the port.




Kinda weird that I didn't have those drivers installed, after installing them I got the full advertised speeds.
Thanks for the help.
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a c 523 G Storage
May 14, 2013 2:31:27 PM

No problem.
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