SSD Maximum speed confusion

[bobbillinger]

Hello,

So I've been reading reviews on SSDs as I'm going to buy my first one and have been very confused with the benchmarks. Most SSDs promote a read speed of 500-550MBps yet I see benchmarks like this: http://www.thessdreview.com/wp-content/uploads/2014/06/RAPID-Samsung-850-Pro-Crystal-DiskMark.png

How is this possible if the maximum is 550MBps, Megabytes per second?

Also isn't the maximum speed for SATA III only 6gbps?

Thank you

 

[bobbillinger]

No one?

 

[mad-max79]

Like the title mentioned "RAPID-Samsung-850-Pro-Crystal-DiskMark.png". There is a fast SSD Samsung 850 Pro with assistance of a RAM Drive, called Rapid which allows such high numbers, but only for the maximum size of the RAM drive. The size depends on your total amount of RAM.

 

[bobbillinger]

You're saying it uses the RAM to boost it's own speed? How would that work as far as transfer speeds via SATA? Can those speeds be realistically reached while copying files between two drives?

 

[bobbillinger]

Sorry I still don't understand the results of these SSD tests

 

[drtweak]

From a quick read it seems what RAPID mode is it a CASHE Really. It Cashe's files to your Systems RAM which is MUCH MUCH FASTER (And why he has such fast read and write speeds) and then once cashed to the RAM it then write it in the background to the actual SSD. This sounds a lot like BBU in RAID Enviroments where the RAID Card has RAM (Vares from 64 Megs to a few Gigabytes) and actaully writes it to the RAM, and it sends a Write Back message to the server saying Hey, I got it, its been written, when really its in Cashe and writing it to the drives at its normal speed.