Why does msata ssd better iops then normal sata3 ssd?

[Shou Miko]

i have been looking at Samsung's Evo ssd serie, to be honest the 250gb but i have been looking at iops too, and what i can see in writing on the msata version got better iops then the normal sata3 anyone know how that can be?

Evo 250gb msata iops:

4KB Random Read: 97000 IOPS
4KB Random Write: 71000 IOPS

Random Read (4KB, QD1): 10,000 IOPS
Random Write (4KB, QD1): 40,000 IOPS

Evo 250gb sata3 iops:
4KB Random Read: 97000 IOPS
4KB Random Write: 66000 IOPS

Random Read (4KB, QD1): 10,000 IOPS
Random Write (4KB, QD1): 33,000 IOPS

More Specs Compare: http://www.samsung.com/sg/consumer/...ductcompare?prda=MZ-7TE250LW&prdb=MZ-MTE250BW

 

[TRWOV]

I would guess is due to less cross-talk or something since there's no cable between connections or it might just be that the mSATA drive has faster chips.

 

[Shou Miko]

i am kinda surprised why there ain't more to answer xD

but u could be right TRWOV i don't know.

 

[Jetster]

I don't think it makes any difference. I think its from something else altogether

 

[fusionblu]

Well to add to this discussion the Samsung 840 EVO mSata SSDs are newer than the normal Samsung 840 EVO SSDs so there is potential different for newer hardware in the mSata SSD.

Most noticeable difference is the design of the SSDs and perhaps the compact design of mSata has an advantage over the normal sized 2.5 Sata SSD.
Reasons might be less processes in the circuit, perhaps? I really couldn't be certain, but perhaps denser FLASH chips in the mSata SSD has an influence with the hardware performance?.

With known information of mSata devices it is known that mSata SSDs can achieve greater speeds when connected to PCI-E adapter expansion card with a separate controller than when connected directly to motherboards which still rely on normal Sata controllers.

Obvious reasons for poorer performance from Sata controller that the bandwidth is shared over the ports, including port for mSata, whether the ports are in-use or not used at all (since they are still powered). Of course ports connected to hard drives, etc use more bandwidth than un-used ports.

As for better performance from separate controller for mSata general reasons include that bandwidth from the controller is focused only on the connected mSata SSD (or SSDs in some cases), Sata controllers on PCI-E can be superior than Sata controller built into the motherboard and lastly with PCI-E adapter expansion card there is access to the bandwidth of the PCI lanes which is considerably more than the bandwidth for the normal Sata controller.

More factors can be included and I'm sure there are many methods of configurations to getting better performance from either normal 2.5 SSDs or different types of SSDs, and it is almost certain more information in different areas of mSata can be added.