mid 2009 macbook pro 17" SSD speeds

[lagwagon]

Hi,

I recently swapped out the old 500gb HHD in my mid 2009 17" macbook pro to an older OWC Mercury Extreme Pro 115gb SSD that i had lying around. Everything works great and what a huge improvement it was. However I have a question regarding it's speed.

In my system info it shows that it's Link Speed and Negotiated Link Speed are both at 3 gigabit, but when I run a test through BlackMagic Disk Speed Test it only gives me about 183 read and 74 write. I assume these are what I would get if it was a link speed of 1.5 gigabit, since from what i've seen other people get is around 250 read and 200 write from 3 gigabit link.

Is this just because my current OWC Mercury Extreme Pro is an older SSD? Would purchasing a new Samsung 256gb or 500gb SSD give me the proper 3 gigabit speeds? Or will it also just run at 183 read / 74 write like my OWC drive?

Thanks

Shaun

 

[pdwalker]

It's because of limitations of the SSD. A newer SSD wouldn't have that speed limit (and the newest ones would be limited by the SATA 3.0gb link speed)

 

[Samuelsan2001]

Hi,

I recently swapped out the old 500gb HHD in my mid 2009 17" macbook pro to an older OWC Mercury Extreme Pro 115gb SSD that i had lying around. Everything works great and what a huge improvement it was. However I have a question regarding it's speed.

In my system info it shows that it's Link Speed and Negotiated Link Speed are both at 3 gigabit, but when I run a test through BlackMagic Disk Speed Test it only gives me about 183 read and 74 write. I assume these are what I would get if it was a link speed of 1.5 gigabit, since from what i've seen other people get is around 250 read and 200 write from 3 gigabit link.

Is this just because my current OWC Mercury Extreme Pro is an older SSD? Would purchasing a new Samsung 256gb or 500gb SSD give me the proper 3 gigabit speeds? Or will it also just run at 183 read / 74 write like my OWC drive?

Thanks

Shaun

To be honest sequential read write speeds aren't that important unless you are moving huge files around all the time. Its the huge improvements in random I/O that make ssd's such a big bonus to most people. Its an old machine its doing what you want well I would not bother with sinking money into a 9 year old laptop myself.