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Windows 7: Sata 3 Cables

21 May 2011   #11
kbronski

Windows 7 Pro x64
 
 

Don't quote me on this, but, if my research is correct, SATA 3 cables use slightly thicker wires inside the insulators, allowing for more data handling and therefore a faster transfer. I'm still new to the SATA 3 phenomenon though, so again, don't quote me on it. I do know that it's not really beneficial at all unless you have a SATA III solid state drive though.
My laptop has SATA 2 hookups, and I'm sure that will be plenty for now, for me.


My System SpecsSystem Spec
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21 May 2011   #12
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by pparks1 View Post
Quote   Quote: Originally Posted by whs View Post
Quote:
the only SATA 3 devices that I currently have are hard drives, which I understand are not able to really use the SATA 3 bandwidth
That is not neccessarily true. I am sure your external disks can run at more than 50MB/sec which is approximately the maximum transfer speed of Sata2 (480Mb/sec). I suggest you verify your disks with HD Tune or Atto.
What? I think you have confused something. SATA 2 is known better as Sata 3.0Gbps. A SATA2 drive can sustain almost 375MB/sec...

480Mb/sec is the USB 2.0 spec. I think that is what you are thinking of. The original poster didn't necessarily mention an external hard drive....i think he was talking about internal SATA drives and their physical connections to the motherboard.
I think you are right. I was thinking of USB2 versus USB3.
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21 May 2011   #13
GeneO

Windows 10 Pro. EFI boot partition, full EFI boot
 
 

Quote   Quote: Originally Posted by whs View Post
Quote:
the only SATA 3 devices that I currently have are hard drives, which I understand are not able to really use the SATA 3 bandwidth
That is not neccessarily true. I am sure your external disks can run at more than 50MB/sec which is approximately the maximum transfer speed of Sata2 (480Mb/sec). I suggest you verify your disks with HD Tune or Atto.
What? Sata 2.0 is 3 Gb/s and use 8b/10b encoding so the maximum rate is 300 MB/s. 480 Mb/s -that is USB 2.0 speed, not SATA 2.0 speed.
My System SpecsSystem Spec
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21 May 2011   #14
GeneO

Windows 10 Pro. EFI boot partition, full EFI boot
 
 

Quote   Quote: Originally Posted by pparks1 View Post
Quote   Quote: Originally Posted by whs View Post
Quote:
the only SATA 3 devices that I currently have are hard drives, which I understand are not able to really use the SATA 3 bandwidth
That is not neccessarily true. I am sure your external disks can run at more than 50MB/sec which is approximately the maximum transfer speed of Sata2 (480Mb/sec). I suggest you verify your disks with HD Tune or Atto.
What? I think you have confused something. SATA 2 is known better as Sata 3.0Gbps. A SATA2 drive can sustain almost 375MB/sec...

480Mb/sec is the USB 2.0 spec. I think that is what you are thinking of. The original poster didn't necessarily mention an external hard drive....i think he was talking about internal SATA drives and their physical connections to the motherboard.
SATA uses 8bit/10bit encoding. The result is that every 8 bits of data uses 10 bits on the wire. So for SATA 3Gb/s the mazimum data transfer speed is 300 MB/s - not 375 MB/s. And for SATA 6Gb/s it is 600 MB/s. The 8b/10b encoding makes it easy to calculate MB/s for SATA - divide the Gb/s by 10

Just an FYI, some other high speed transmission protocols that use 8b/10b encoding are SAS, Fiber Channel, USB 3.0, DVI, HDMI, Gbit Ethernet, Infiniband, PCI Express up to 2.x, and IEEE 1394B.
My System SpecsSystem Spec
21 May 2011   #15
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by GeneO View Post
Quote   Quote: Originally Posted by whs View Post
Quote:
the only SATA 3 devices that I currently have are hard drives, which I understand are not able to really use the SATA 3 bandwidth
That is not neccessarily true. I am sure your external disks can run at more than 50MB/sec which is approximately the maximum transfer speed of Sata2 (480Mb/sec). I suggest you verify your disks with HD Tune or Atto.
What? Sata 2.0 is 3 Gb/s and use 8b/10b encoding so the maximum rate is 300 MB/s. 480 Mb/s -that is USB 2.0 speed, not SATA 2.0 speed.
I think I said so in the post just above yours. I was indeed thinking of USB and not the Sata port. Nobody is perfect . LOL.
My System SpecsSystem Spec
21 May 2011   #16
GeneO

Windows 10 Pro. EFI boot partition, full EFI boot
 
 

Quote   Quote: Originally Posted by whs View Post
Quote   Quote: Originally Posted by GeneO View Post
Quote   Quote: Originally Posted by whs View Post
That is not neccessarily true. I am sure your external disks can run at more than 50MB/sec which is approximately the maximum transfer speed of Sata2 (480Mb/sec). I suggest you verify your disks with HD Tune or Atto.
What? Sata 2.0 is 3 Gb/s and use 8b/10b encoding so the maximum rate is 300 MB/s. 480 Mb/s -that is USB 2.0 speed, not SATA 2.0 speed.
I think I said so in the post just above yours. I was indeed thinking of USB and not the Sata port. Nobody is perfect . LOL.
No slam intended. I should read through the whole thread before responding
My System SpecsSystem Spec
21 May 2011   #17
profdlp

Main - Windows 7 Pro SP1 64-Bit; 2nd - Windows Server 2008 R2
 
 

Looks like the "quality" questions have been covered.

Quote   Quote: Originally Posted by seekermeister View Post
...The only difference that I can see in them, is one pair has black connectors, and the other gray...
If nothing else, in a crowded case the color coding would help you get the right drives to the right MB connection(s).
My System SpecsSystem Spec
21 May 2011   #18
HammerHead

win 7 X64 Ultimate SP1
 
 
Pin Outs

The pin outs are the same is why they will interchange. The sata 3 cable is connected to controllers running at higher speeds. To take advantage of this the cable should be constructed of thicker mils of wire and/or higher purity copper. Either or both of those factors would lower the ohm rating of the cable. Which would enhance the capability of the cable to transfer signals at a higher rate and maintain the same temp.
My System SpecsSystem Spec
21 May 2011   #19
GeneO

Windows 10 Pro. EFI boot partition, full EFI boot
 
 

I think what you said may be misunderstood. Any quality SATA 2.0 cable will work with SATA 3.0. I don't think the wires have to be bigger in diameter or have less resistance and I doubt there is any difference in copper purity in any electrical conductors used for computer transmissions, but I would be happy to be proved wrong.
My System SpecsSystem Spec
21 May 2011   #20
seekermeister

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 

Quote   Quote: Originally Posted by GeneO View Post
I think what you said may be misunderstood. Any quality SATA 2.0 cable will work with SATA 3.0. I don't think the wires have to be bigger in diameter or have less resistance and I doubt there is any difference in copper purity in any electrical conductors used for computer transmissions, but I would be happy to be proved wrong.
I'm not sure how anyone would go about proving you wrong, but the fact that there is some kind of difference in the quality of the cables suggests that you probably are. If not the wire gauge, or the metallic composition, the only thing left would be the insulation, and some how that seems highly unlikely.

EDIT: This is not a question of whether a SATA II cable will work with a SATA III device or not. It is whether it will work as well?
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 Sata 3 Cables




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