Early 2011 13" MacBook Pro Sata III

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?
 

SDAVE

macrumors 68040
Jun 16, 2007
3,381
443
Nowhere
Must be the drive. Your MBP definitely supports Sata III (6gbps); No way to force it to use 6gbps.
 

eerikk

macrumors newbie
Original poster
Oct 12, 2011
7
0
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.

----------

Must be the drive. Your MBP definitely supports Sata III (6gbps); No way to force it to use 6gbps.
I sent in a support ticket to Corsair about it and they said to check with apple because it might be a compatibility problem.
 

SDAVE

macrumors 68040
Jun 16, 2007
3,381
443
Nowhere
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.
 

eerikk

macrumors newbie
Original poster
Oct 12, 2011
7
0
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.
 

SDAVE

macrumors 68040
Jun 16, 2007
3,381
443
Nowhere
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.
 

lixuelai

macrumors 6502a
Oct 29, 2008
808
68
3 gigabits = 3,000 mb. The drive is maxed at 500 mb/s... How are your speeds being impacted?
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.
 

eerikk

macrumors newbie
Original poster
Oct 12, 2011
7
0
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.
 

goRoostr

macrumors member
May 17, 2012
63
0
Philadelphia Suburbs
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?
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?
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.