How much SSD space before performance drops?

[columbusohio]

Hi there, I have an 128GB Samsung 850 evo. Right now it has about 70 GB left with 119GB total. How many GB or percentage of free GB should I save so that the performance of the SSD won't be jeopardized at all?

[SolarNova]

On small capacity SSD's , ~85% usage

[Shally]

1 minute ago, SolarNova said:

On small capacity SSD's , ~85% usage

And even then I wouldn't worry about it. It isn't gonna feel like a HDD

[geo3]

Do you have over provisioning enabled?  If so it shouldn't matter.

[Tristerin]

5 minutes ago, columbusohio said:

Hi there, I have an 128GB Samsung 850 evo. Right now it has about 70 GB left with 119GB total. How many GB or percentage of free GB should I save so that the performance of the SSD won't be jeopardized at all?

 

1 minute ago, Shally said:

And even then I wouldn't worry about it. It isn't gonna feel like a HDD

This - especially if you are a gamer.  I have a 250 and 500gb Samsungs at near full capacity at all times

[columbusohio]

13 minutes ago, geo3 said:

Do you have over provisioning enabled?  If so it shouldn't matter.

Is there a difference between if you overprovision 20% and if you don't overprovision, but don't use the 20% available space on your SSD? 

[Mira Yurizaki]

This problem only affects write performance. Read performance is unaffected (at least it should be)

[geo3]

21 minutes ago, columbusohio said:

Is there a difference between if you overprovision 20% and if you don't overprovision, but don't use the 20% available space on your SSD? 

Don't know. I wouldn't theory craft on this one. I'd like to see actual tests done to compare the two.

[Lady Fitzgerald]

From what I've read, one should leave 20-25% head room (unused space) on an SSD in addition to factory over-provisioning. While performance (mostly write) will be reduced as an SSD fills up, the main problem with leaving too little unused space on an SSD is increased write amplification which will consume remaining write life at a much faster rate.

 

In your case, I would say you can safely use another 10GB of space with the remaining being kept empty (don't add it to the factory over-provisioning; just keep 30GB unused). You can get away with using more than 10GB more but at the cost of accelerated write life consumption and a slight performance hit.