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Question on SSD

A

AirPower4ever

Limp Gawd
Joined
Dec 20, 2009
Messages
131
I'm not really sure about this because I thought I read this somewhere. Whether true or not, I am looking to you guys for the verdict.

If I buy an SSD that is SATA III and I connect that SSD to a SATA II port, will the SSD "detect" that it is a SATA II port and then kick down in performance meaning the amount of MB it transfers?

Example, let's say the SSD can do 550MB read/500MB write. Then I plug it in to a SATA II port. Will the SSD then "detect" this and then only transfer let's say at 275MB read/265MB writes? I am just throwing those numbers out, not facts on these numbers though.

Or will the SSD just saturate that port to 300MB reads /300MB writes because it really is suppose to do 550/500?

I want to buy an SSD, but it seems like the SATA III SSD are now cheaper than the SATA II SSD's, at least at the manufacturer that I am looking at.
 
The SSD will saturate the port, but it will not be 300/300 since that's theoretical.
 
SATA is backwards compatible, so it will just be running at the slower SATA speeds, but it will work fine. And unless you are doing a lot of big sequential transfers you won't notice the difference anyway, because the SATA mode doesn't affect the random performance which is where SSDs shine.
 
Or will the SSD just saturate that port to 300MB reads /300MB writes because it really is suppose to do 550/500?
Click to expand...
Yep, that's all it is.

The SATA connection is just an interface and has nothing to do with the speed of the drive.
 
Okay, thanks. As mentioned, I see some 120GB SSD's SATA III cheaper than the SATA II of that same size.

Thanks everyone!
 
The difference between moving 300MB/s and 500MB/s isn't going to come up often. The SSD's biggest advantage will be the response time and random read/writes which will be much lower. In the vast majority of the use, you would probably not notice a difference between SATA II and III, but if you haven't had an SSD before you absolutly will notice the difference between SSD and platter.
 
Thanks and yes. I have a new Asus P8P67 Pro v3.1 with a SSD in the SATA III port, what a difference. I need to buy some more for out main systems and this came only because;
* our boards only have SATA II ports
* cost of SATA III drives are cheaper than SATA II (again, at least at the ones I am looking at)

Thanks again for the info.
 
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