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Early 2011 13" MacBook Pro Sata III

E

eerikk

macrumors newbie
Original poster
Oct 12, 2011
7
0
What does "Negotiated Link Speed:3 Gigabit" mean when I have a sata III drive and connection?

I have an Early 2011 13" MacBook Pro and purchased a Corsair Force 3 120gb SSD to replace the HDD. It's all running fine (kind of). I have the latest firmware on the drive and all the updates for my mac. This drive is supposed to get around 500 MB/s r/w speed but because it is only being recognized at 3 Gigabit my speeds are being severely impacted.

Is there some way to force the drive into Sata III?
 
Must be the drive. Your MBP definitely supports Sata III (6gbps); No way to force it to use 6gbps.
 
The theoretical speed of 3 gigabits is closer to 300 megabytes/s.
But i'm saying the corsair force 3 should be getting 500megabytes/s (on a sata III connection 6 gigabit) however I am only getting around 100 megabytes/s. According to my system information:
Vendor: Intel
Product: 6 Series Chipset
Link Speed: 6 Gigabit
Negotiated Link Speed: 3 Gigabit
Description: AHCI Version 1.30 Supported

Is there a way to force that negotiated link speed to 6 gigabit because my drive is supposed to support that.

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SDAVE said:
Must be the drive. Your MBP definitely supports Sata III (6gbps); No way to force it to use 6gbps.
Click to expand...

I sent in a support ticket to Corsair about it and they said to check with apple because it might be a compatibility problem.
 
No there is no way to force it because Apple doesn't use a BIOS where you can set settings, etc. It's a closed system.

Do you have the latest firmware?

I have an early 2011 and a Samsung 830 and it is running at 6gigabit. I get 500MB/sec read, 380MB/write.

This is the reason I always recommend the top 3 SSDs. Crucial, Samsung, Intel. You're not saving THAT much money if you go with Crucial than let's say a Corsair.
 
I do have the most recent firmware 1.3.3

I might just have to deal with the slower speeds :(

It's amazing how fast SSD's are getting cheap, I bought this drive in early July when it was saving nearly 80 bucks now I could buy this same drive for nearly half.
 
Seems like someone else has it running at 6gigabit on the same MBP.

Also remember, the 120GB/128GB SSDs are much slower than the 256GB and 512GB drives. The reason is there are less NAND chips on the board, thus a lower speed.

You're not supposed to get 500MB/sec read on the smaller SSDs.
 
goRoostr said:
3 gigabits = 3,000 mb. The drive is maxed at 500 mb/s... How are your speeds being impacted?
Click to expand...

3Gb/s = 375MB/s. 375MB/s < 500MB/s. Now whether that SSD actually performs "as advertised" is a different story though chances are it is still being bottlenecked by the bus.
 
I used the same utility and my speeds are about a quarter slower than his, idk but I'm not sure that speed will be visibly noticeable?

Bummer that corsair tells me the drive will get up to 500mb/s speeds but it comes no where close.
 
theSeb said:
Yeah. So look at your previous post again and tell me about solid state drives that max out at 500 megabits per second. Who sells those?
Click to expand...

Sorry if I used the wrong term(max) instead of around, I was just reiterating the original poster. If you want to nit pick we'll say Max out at 550, feel better now?
 
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