SSD on SATA 2... worth it?

SyntaxSocialist

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Jan 20, 2013
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I asked a version of this earlier but it's kind of gotten lost in the mix. It's a secondary question so I guess a new threat makes sense:

I'm maxing out my early '08 MacBook. Replacing the optical drive, doubling the RAM, upgrading the OS, and cleaning it both physically and digitally. I was going to upgrade the CPU, but it's soldered to the board, and a new one would be ~$200 for only a couple extra MHz.

Anyway, being an '08 laptop, its hard drive connection is SATA2. I feel like an SSD would still be worth it. I just want to make sure my reasoning is sound:

I have a 5400rpm HDD connected to a SATA2 connection on the motherboard using a SATA1 (1.5Gb/s) interface. Even assuming that the HDD could saturate its 1.5Gb/s allowance (which I'm sure it can't), an SSD like the Samsung 840, which has a maximum write speed of 530MB/s (4.14Gb/s), would theoretically double my maximum throughput when it caps out at 3.0Gb/s (thus still under-utilizing its potential).

Right?
 
Solution
yes, you would definalty see an increase in performance. Even SATA II SSDs "destroy" your laptop HDD witch is very slow. I tested my laptop HDD on SATA II and it had a max read of 70 MB/s .............. I even mounted the HDD into my desktop and made a test to copy an .mkv, the drive could not write faster then 50 MB/s. A good sata II SSD could max out the SATA II port.

crisan_tiberiu

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Nov 22, 2010
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yes, you would definalty see an increase in performance. Even SATA II SSDs "destroy" your laptop HDD witch is very slow. I tested my laptop HDD on SATA II and it had a max read of 70 MB/s .............. I even mounted the HDD into my desktop and made a test to copy an .mkv, the drive could not write faster then 50 MB/s. A good sata II SSD could max out the SATA II port.
 
Solution

gaborbarla

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SSDs can access small files many times faster than normal spinning drives, as the head doesn't have to jump around to get to them. They also have generally faster throughput.
The small file read is bad on a normal drive that the SSD on a SATA2 will completely destroy it in benchmarks that can be hundreds or thousands times faster. So that is the main reason for the marked increase. You will no longer see you icons load one by one and windows will load straight to the desktop and you shouldn't have to wait. Everything will be a lot quicker in response, but make sure you run your SSD in AHCI not in IDE mode. Actually that goes for normal drives also.

Hope this helps. Gabor