So we all know SSDs are faster than HDDs but how much faster?
Can anyone in the know tell me as a percentage, how much faster an 840 evo (non pro) is faster than a 5400 and 7200 rpm HDD?
For bonus points, could you put the speed of the 840 evo in terms of RPM?? Obviously you cant measure RPM for an SSD coz they dont have spinning disks, but it would be cool to say for example that an 840 evo is comparable to a hypothetical 20,000rpm hdd.
If i remember correctly… my 7200 rpm HDD can sustain a write speed of 100MBps via SATA 2 (and probably about the same in SATA3)
My 840 EVO 250GB according to samsung's website gets about a sustained speed of ~500MBps.
So the 250GB SSD is roughly 5x faster then my 7200rpm HDD… from the stats that I remember.
Not too sure how to put that in terms of RPM though…
Samsung Spinpoint F3 (great drive) goes about 120mbps write, at the time of review (2010) this is one of the best performing 7200RPM drives that didn't cost a bomb.
The Samsung Evo 840 250GB has a benchmark result 4kb random write of 275.5 according to Anandtech so that is roughly 2x the write performance.
Notice that the higher capacity drives are usually at the top of the charts. That's because bigger SSDs have more memory chips, has more memory channels as a result and that means there are more memory chips doing the reading/writing at the same time.
As a user, it's not even worth comparing. SSDs are fast. HDDs are like something out of the Flinstones.
Like a bird with big beak chipping away at a stone disc ?
RPM isn't what determines the data speed.
I know but it plays a part. I was just looking for someone to humour me, so If a tech illiterate person asked me what the difference was i could say the SSD is like a xxxxRPM HDD. I think instead ill just say they are at least twice as fast on average.
But thanks to those that replied, I've got a pretty good idea now :)
For small reads and writes its many many times faster. And depending on many other factors, it will be generally more than twice as fast for long file copies, virus checks and so on. And for many tasks it makes no difference at all.
Here is how I explain it to a tech illiterate person:
- it makes your pc snappier and more responsive
- it won't slow down randomly as much
- it will start and shut down much faster
- it won't slow down over time as badly as you may be familiar with
- virus checks and file copies will be faster
- MS Office will feel faster
- playing games will feel the same (maybe some faster startups and level loads if you are lucky)
- transcoding video will be the same
- for the money less room for movies, photos, music etc - you'll need a second disk, maybe external
In summary - get one unless you are spending less than $450 on a PC.
for me
ssd load windows in 5-10 seconds
hhd its over 30 seconds
Why don't you just google the max speed of file transfer for the 840 evo and then compare the max speed of your HDD.