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Can someone explain SATA cable speeds to me?

post #1 of 23
Thread Starter 
I'm building a PC and thought I'd buy a couple extra SATA cables in case I need them. I'm getting an ASUS P8Z77-V Pro motherboard which supports 6 GB/s.

So, what components will actually use that? What does the 6 GB/s mean? That, for example, data is going back and from from my HDD to the processor at the rate of 6 gigabytes per second? I'm getting a SSD for my new build, if that matters.

I was looking at this cable in newegg, but I don't see a speed rating anywhere. And speed doesn't seem to be a sorting option for some reason. Is this particular one 6 GB/s?

I'm just looking for kind of a basic, crash-course on SATA cables and speeds, and what to look for when buying.
post #2 of 23
Quote:
Originally Posted by lukeman3000 View Post

I'm building a PC and thought I'd buy a couple extra SATA cables in case I need them. I'm getting an ASUS P8Z77-V Pro motherboard which supports 6 GB/s.
So, what components will actually use that? What does the 6 GB/s mean? That, for example, data is going back and from from my HDD to the processor at the rate of 6 gigabytes per second? I'm getting a SSD for my new build, if that matters.
I was looking at this cable in newegg, but I don't see a speed rating anywhere. And speed doesn't seem to be a sorting option for some reason. Is this particular one 6 GB/s?
I'm just looking for kind of a basic, crash-course on SATA cables and speeds, and what to look for when buying.
How many drives are you actually going to use? The board comes with four SATA cables, and two are 6gb/s. The 6gb/s is the maximum data transfer bandwidth. As far as i know, nothing really saturates it, but there is probably some performance to gain with the newer cables. An SSD would be more likely to see improvement with the higher bandwidth cables than a conventional hard drive.
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post #3 of 23
Also, the specification to look for using the 6gb/s is SATAIII. It would probably be easier to search for that.
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post #4 of 23
I'll explain it to you in simple terms: Speed ratings on SATA cables mean squat smile.gif
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post #5 of 23

Currently the latest release of SATA is SATA 3. Sometimes you might see it said as SATA 6Gbps (gigabits per second not to be confused with gigabytes per second/GB/s). This is the maximum theoretical speed which the storage device can transfer data from its cache to the interface of the PC.

 

So essentially your computer will be able to access data on the storage device faster. A user will not usually notice a difference, unless they use programs affected by transfer speeds.

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post #6 of 23
Just don't buy the absolute cheapest cable you can find and you'll be fine.

6gb/s cables are supposed to have better shielding to make sure the signal isn't slowed down. Truth is the vast majority of 3gb/s cables have enough to carry the 6gb/s signal no problem.
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post #7 of 23
Quote:
Originally Posted by MrAlex View Post

Currently the latest release of SATA is SATA 3. Sometimes you might see it said as SATA 6Gbps (gigabits per second not to be confused with gigabytes per second/GB/s). This is the maximum theoretical speed which the storage device can transfer data from its cache to the interface of the PC.

So essentially your computer will be able to access data on the storage device faster. A user will not usually notice a difference, unless they use programs affected by transfer speeds.

For example, Windows and any operating system that bootstraps itself and runs programs from disk, or uses virtual memory... or... OK so any desktop OS.
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post #8 of 23
Quote:
Originally Posted by tompsonn View Post

Quote:
Originally Posted by MrAlex View Post

Currently the latest release of SATA is SATA 3. Sometimes you might see it said as SATA 6Gbps (gigabits per second not to be confused with gigabytes per second/GB/s). This is the maximum theoretical speed which the storage device can transfer data from its cache to the interface of the PC.

So essentially your computer will be able to access data on the storage device faster. A user will not usually notice a difference, unless they use programs affected by transfer speeds.

For example, Windows and any operating system that runs programs from disk, or uses virtual memory... or... OK so any desktop OS.


I was sort of imagining the scene of a user being at their desktop, say loading a browser or the likes tongue.gif

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post #9 of 23
Quote:
Originally Posted by MrAlex View Post


I was sort of imagining the scene of a user being at their desktop, say loading a browser or the likes tongue.gif

Of course you would be imaging that, Mr Waterfox! tongue.giftongue.gif
Nah but I know what you mean, I was just being pedantic wink.gif
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post #10 of 23
Thread Starter 
Quote:
Originally Posted by Equine View Post

How many drives are you actually going to use? The board comes with four SATA cables, and two are 6gb/s. The 6gb/s is the maximum data transfer bandwidth. As far as i know, nothing really saturates it, but there is probably some performance to gain with the newer cables. An SSD would be more likely to see improvement with the higher bandwidth cables than a conventional hard drive.

So, two of the cables are 6 Gb/s while the other two are not?

I read an article in which they tested different SATA cables and found that they all performed roughly the same, regardless of their classification.

That said, should I probably be ok using the non 6Gb/s in my build? I'll have 3 devices:

Crucial M4 256 SSD (6Gb/s)
Seagate Caviar Black 1TB 7200 RPM (6Gb/s)
ASUS DVD+RW (non 6Gb/s)

Should I be ok using the non 6Gb/s cable on my CD/DVD drive, or am I missing out? The way it sounds, the non 6Gb/s SATA cables included with the P8Z77-V Pro should hopefully perform equally as well as the ones that are labeled as being 6 Gb/s... Can anyone confirm this?
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