Why is my Crucial m4 SSD Harddrive so slow on an Asrock SATAIII 6GB/s Controller?

2

I bought a new SSD, the Crucial 128GB m4. According to AS SSD Benchmark it can have 415 MB/s read and about 175 MB/s write.

I have an Asrock X58 Extreme Mainboard with 6 onboard SATAII connectors. So I thought I need a SATAIII Controller, so I bought and Asrock SATAIII PCIe Controller.

Now the speed on the SATAIII is much too slow, 150 MB/s read, 105 MB/s write. I've installed the latest drivers from Asrock.

When I plug the SSD into the on board SATAII Controller I have 360 MB/s read and 175 MB/s write speed.

What is wrong with it? Why is it not performing as it should?

JohnnyFromBF

Posted 2011-09-04T21:14:49.393

Reputation: 4 298

What speed is the PCIe slot you've plugged into? – None – 2011-09-04T23:15:35.223

It's an Asrock X58 Extreme, in the specs it says "PCI Express x1" – JohnnyFromBF – 2011-09-05T07:43:17.423

Answers

1

My guess is that your PCI Express slot is the bottleneck, especially if it's a x1, which means one lane. Your newer slots have 16 lanes, and I'll bet that on those faster slots, the drive would work faster too.

user3463

Posted 2011-09-04T21:14:49.393

Reputation:

It's an x1 card. – David Schwartz – 2016-02-29T00:17:40.460

I plugged it into the x16 one, but it was still slower than the native SATAII Controller, pretty frustrating those slow Intel PCIe lanes. – JohnnyFromBF – 2011-09-08T14:47:45.690

Asked: 2011-09-04T21:14:49.393

Viewed: 931 times

Active: 2016-02-29T13:30:26.190