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SSD not as fast as advertise

Last response: in Storage
September 30, 2011 11:21:40 PM

Hello, i have a SLD3-25SAT3-120G and it is installed on asus p6x58d-e.

The SSD is connected on the sata 3 port 1 using the sata 3 cable that came from motherboard package.

I have set AHCI mode and turn marvell on in the bios.

Installed window 7 sucessfuly, boot work fine.

My problem is the fact that ATTO benchmark only report
READ : 402 MB/sec
WRITE : 242 MB/sec

The spec on the box cleary advertise
READ : up to 500 MB/sec
WRITE : up to 450 MB/sec

Is anyone having same issue with same motherboard?
What could it be the cause of this?


More about : ssd fast advertise

a c 177 V Motherboard
a c 119 G Storage
September 30, 2011 11:33:39 PM

One of the things with SSD'S is that when you look at the spec's they always seem to say " up to " when listing the speed of the SSD. Just one of those things you don't seem to notice when reading the spec's. Where did you buy this SSD from ? If you just bought it and can return it , do so and get another there is always the possability you have a defective one.
September 30, 2011 11:41:49 PM

yeah but my write speed is way off in my opinion.
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a c 177 V Motherboard
a c 119 G Storage
September 30, 2011 11:49:16 PM

multisync said:
yeah but my write speed is way off in my opinion.

See if you can return it.
a b V Motherboard
a c 352 G Storage
October 1, 2011 12:27:56 AM

Yes, the Intel Sata III and using the Intel latest RST version 10.6 provide better performance than using the marvel basaed Sata III port and mavel's ahci driver.

How much of a hit, Not sure. OCZ sata III drives that use the SF2281 controller. This provides very high Sequencial read/writes when uncompressed data is used in the bench mark. 2 things, (A) Sequencial read / writes are the least important function, the Random 4 K read/writes are what are important for a OS + Program drive. (B) Real life data is not nearly as compressable.

Best solution

a c 219 V Motherboard
a c 154 G Storage
October 1, 2011 1:49:41 AM

Your SSD is performing exactly as advertised.
"UP TO xxxMB/sec"

The ATTO benchmarks by default measure sequential I/O using overlapped I/O and a queue depth of 4.
I doubt that you have any app on your pc written that way.

Fast random I/O of small blocks at low queue lengths is what the OS does mostly, and any SSD will do that exceedingly well. Response times of 0.1ms would be typical, and that is 100x faster than a conventional HDD.

Just enjoy your SSD for what it does.
October 11, 2011 2:31:22 PM

Best answer selected by multisync.