Difference between sata 3.0 and 6.0
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palma8
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palma8 Posted messages 63 Status Membre -
palma8 Posted messages 63 Status Membre -
bonjour j'ai un disque dur de 5400 RPM 8MB Cache SATA 3.0Gb/s et il ne va plus très bien alors je veux en acheter un autre. ma question est puis-je le changer pour un 500GB 7200 RPM 32MB Cache SATA 6.0Gb/s . merci
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SATA3 corresponds to 6.0Gb/s with a 64MB cache (when everything goes well) compared to 3.0Gb/s and 32MB (when it's at its best) for SATA2
Ultimately, it all depends on the model of the drive you will buy.
But before buying a SATA3 drive, you need to check that your PC is compatible; otherwise, it will be read as SATA2.
Conclusion: bad news, your drive with a 32MB cache is just as fast as a SATA2.
If your PC is compatible, choose a drive with a 64MB cache (for the 7200RPM it's the right choice, but they are more expensive)
If you can, for a few extra €, you can also buy an SSD which will offer a real difference (if your PC supports SATA3, it should not be on XP which does not read SSDs natively).
Ultimately, it all depends on the model of the drive you will buy.
But before buying a SATA3 drive, you need to check that your PC is compatible; otherwise, it will be read as SATA2.
Conclusion: bad news, your drive with a 32MB cache is just as fast as a SATA2.
If your PC is compatible, choose a drive with a 64MB cache (for the 7200RPM it's the right choice, but they are more expensive)
If you can, for a few extra €, you can also buy an SSD which will offer a real difference (if your PC supports SATA3, it should not be on XP which does not read SSDs natively).
"SATA3 corresponds to 6.0 Gb/s with a 64 MB cache (when everything goes well) compared to 3.0 Gb/s and 32 MB (when it's at its best) for SATA2"..
The cache has nothing to do with the SATA2 or SATA3 standards. You can have SATA3 hard drives with 16 MB caches, or even 8 MB.
"But before buying a SATA3 disk, you need to check if your PC is compatible; otherwise, it will be read as a SATA2".
This gives the impression that if one were to put a SATA3 disk in a PC that only has SATA2 ports, it would not be compatible. That's not true. The two standards are backward compatible. The only thing to know is that the SATA3 disk will operate at the speed of a SATA2 hard drive. In any case, even if you have a SATA2 port, it is advisable to buy a SATA3 hard drive. What you need to worry about is the size of the hard drive. Laptops generally use 2.5" format hard drives.