Are SATA 3Gbps HDDs slower than 6Gbps HDDs?

cjgeist · Oct 5, 2014

I'm planning to do my first build soon, and to save some money, I'd like to reuse a hard drive I already have. But it is a 3 Gbps drive. Would I see any significant change in performance if I buy a newer hard drive?

Edit: Sorry to ask what seems like such a common question, but the only answers I've found have been about using a new drive with an old mobo. My question is the opposite, so I'm still a little unsure.

Thanks

legend001523 · Oct 5, 2014

You wouldn't see a huge increase, but you wuld notice it, it's going to be twice as fast so there'll be improvements. but if you can't afford one atm you can just use it for your new build too,

MeteorsRaining · Oct 5, 2014

No, if its 3.5" and 7.2k RPM drive, it'd work as well as a 6GB/s one, the reason being HDDs simply aren't fast enough to take advantage of extra bandwidth provided by III over II, SSDs are the main advantage takers of 3 over 2. No performance drops with HDD.

MeteorsRaining · Oct 5, 2014

legend001523 :

Most current HDDs can't match even SATA II speed cap, SATA III is no advantage over II for HDDs.

legend001523 · Oct 5, 2014

I think the Op is talkuing about the actual speeds of the hdd's, not the sockets, could be wrong doe

MeteorsRaining · Oct 5, 2014

The benchmark is the speed of HDDs, not socket. And the max speed cap for SATA II is 300MB/s, that of SATA III is 600MB/s, and as we can see from benchmarks, most consumer grade HDDs don't even cross 200MB/s, so SATA II (HDD, not socket) will not cause any loss in speed or performance, that's my only point.

His question is, SATA 3GB/s HDD vs SATA 6GB/s HDD (not socket).

Similarly, Given they're 3.5" and 72.k RPM, it'll not have any less performance than a 6Gb/s one. The essential way of read/ write data is same in both, its just that speed cap is different, which's both applicable to socket and HDD.

I understand your point, he's talking about HDD speeds not socket cap, but its more or less the same given its 3.5" and 7.2k RPM

cjgeist · Oct 5, 2014

Thanks to both of you. Yes, I was talking about the speed of the drives themselves rather than the socket.

MeteorsRaining · Oct 5, 2014

Glad to help

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