My motherboard is Intel DG41TY and it does not support AHCI. How much would IDE mode + SATA 2 be slower comparing to ideal case AHCI+SATA 3? If it is much slower for SSD case, then would it be a good idea for me to get SSHD since it is little bit more expensive than HDD, but still can give me a good speed improvement even though not as good as SSD?
2 Answers
I had the same question when I got my Vertex 2 SATA II and here is what I got from some tests on crystal diskmark (My mobo could be configured with AHCI and I wanted to see the dif. in each mode):
This was the SSD on a SATA II port with ide.
Same drive same port, bios changed to ACHI:
I got a PCIe to SATA III card(As I got a good deal on two more Kingston Hyper X SATA III SSDs) and hooked the same drive to that card with AHCI enabled for this result:
For the sake of comparison to a platter drive with IDE and AHCI mode see this:
I do not think you will see much difference from a SSD to a SSHD in ide mode. The SSD and hybrid drive will perform much better than a platter drive in the same ide mode.
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thx for answer with details. Dont understand why hdd with ahci has slower 4k qd=32 while ncq should be on comparing to ide, but number is small anyway. Sep 19, 2013 at 0:46
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1Did you disable read/write caching when doing these tests? Otherwise you are measuring the completely wrong thing. Dec 21, 2014 at 8:29
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@BlueRaja - nope. I left everything as it was and ran the tests. I wanted to see the difference AHCI made.– Carl BDec 27, 2014 at 20:54
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1If you do not disable read/write caching, you are not testing AHCI, you're testing your OS's proficiency at caching. Dec 28, 2014 at 7:10
Even if you connect your SSD to a SATA2 port, it will still be bottle necked by the speed of the sata port. It will be a noticeable difference from a HDD, but you'll only be running at about half of your SSD's potential (Depending on your SSD).
Here's some more information on different speeds while connected to different SATA ports: http://kb.sandisk.com/app/answers/detail/a_id/8142/~/difference-between-sata-i,-sata-ii-and-sata-iii