Speed of SSD in 3gb/s port

[graywolfthegreat]

How fast or how slow will my ssd samsung 840 evo 500gb hold up with a 1tb hhd. I have 3 sata ports that are 3gb/s i dont know how fast this will improve waiting times.

 

[abhinav_mall]

SSD would definitely be a huge improvement.
You should get 200MBps to 500MBps of Read/Write speed based on load. Move your OS, important software and game partitions to it and see the difference.

 

[USAFRet]

How fast or how slow will my ssd samsung 840 evo 500gb hold up with a 1tb hhd. I have 3 sata ports that are 3gb/s i dont know how fast this will improve waiting times.

That SSD in a SATA II port will be faster than the 1TB HDD. But not "500MBps" as posted above.

It won't be as fast as if it were in a SATA III port, but it will be a noticeable improvement.

 

[herrwizo]

The biggest improvement is moving from HDD tzo SSD, even if you only use SATA2 interface. Feel free to use it, you will be pleasantly surprised.

 

[Solandri]

It will be nearly indistinguishable from running the SSD on a 6 Gbps SATA 3 port.

Sequential speeds, time to read 1 GB of data
HDD = about 125 MB/s = 8 sec
SATA 2 SSD = 250 MB/s = 4 sec (4 sec faster)
SATA 3 SSD = 500 MB/s = 2 sec (6 sec faster)

So the SSD in SATA 2 gives you 67% the wait time reduction of switching from a HDD to SATA 3 SSD.

4k speeds, time to read 100 MB of data
HDD = about 1 MB/s = 100 sec
SATA 2 SSD = 40 MB/s = 2.5 sec (97.5 sec faster)
SATA 3 SSD = 40 MB/s = 2.5 sec (97.5 sec faster)

So the SSD in SATA 2 gives you the same wait time reduction of a SATA 3 SSD

Mixed 1 GB sequential and 100 MB 4k data
HDD = 108 sec
SATA 2 SSD = 6.5 sec (101.5 sec faster)
SATA 3 SSD = 4.5 sec (103.5 sec faster)

So the SSD in SATA 2 mode will give you 98% the wait time reduction of being plugged into a SATA 3 port.

Basically the only time most people would notice the speed difference is when copying large media files from one folder to another on the SSD. In other regular tasks (where the delays due to small file reads dominate), SATA 2 is nearly indistinguishable from SATA 3.

https://www.tomshardware.com/reviews/sata-6gbps-performance-sata-3gbps,3110-7.html

The only gotcha with SSDs on SATA 2 is that some SATA 2 implementations didn't enable NCQ by default, which allows multiple small file read/writes to be queued and processed together. This can improve 4k read speeds from about 35 MB/s and 4k write speeds from 70 MB/s to around 300 MB/s. If your SATA 2 ports have and are being used in AHCI mode, then NCQ is enabled (a lot of them defaulted to being used in IDE mode, I guess for compatibility with older OSes).

 

[USAFRet]

One of the drives in my HTPC is an older SanDisk 120GB. SATA II drive.
I mostly can't tell the difference between it and a SATA III SSD. Mostly.

 

[graywolfthegreat]

Thanks for the help.