ssd 850 evo enormous slowdown without reason.

sz0ty0l4 · Apr 1, 2015

Hello i have a pretty frustrating issue what i've just noticed today. few weeks ago when i bought it and i reinstalled windows i did a performance optimisation and a benchmark with samsung magician.
results were:
544/518 & 92769/84451
todays result:
333/460 & 92550/83480
enormous slowdown in sequential read speed. i've ran performance optimisation and trimmed the ssd, but no change. it is connect to same port since then sata 3 6gbps on z97 chipset.

Only driver i installed since then is intel management service( because i was getting logged errors in event logs).
Possible that intel management engine driver is causing this? should i just get rid of it?
any other ideas?
thanks

edit: Problem is not with ssd, problem is this buggy samsung magician. I've tested the drive now with AS-SSD test and cristaldiskmark 3-3 times and while magician still gives 300/460 results, both as-ssd and cristaldiskmark is giving 530/520 results.

laviniuc · Apr 1, 2015

you can pretty much ignore that difference. the first run you got lucky and all the data was cached in the slc part of the ssd second time it was not. what matters is that the random io is exactly the same.

sz0ty0l4 · Apr 1, 2015

I also experience slower booting. a few days ago when i booted up the pc after the bios screen i did not seen the windows boot logo. it booted instantly to password screen.
Now i see the windows boot logo after asus bios screen for like 1,5-2sec. are you sure it's not caused by this slowdown?

sz0ty0l4 · Apr 1, 2015

no matter how many time i run the benchmark it never goes above 340mbps. 2 weeks ago i did 3 benchmarks with it and it was always above 490mbps.

laviniuc · Apr 1, 2015

how much of the ssd is now filled with data? it's faster the more free space it has. check in resource monitor if/what is writing/reading from it

sz0ty0l4 · Apr 1, 2015

when i ran the first several benchmarks with the normal results it was 200gb free 32 gb reserved
now it is 196 free 37 reserved
Nothing is especially reading/writing from it. only the usual OS read/write sessions with maximum of 20kbps read and 100kbps write(probably pagefile)

I don't understand how the hell can such a good ssd provide such bad slowdown in 2 weeks when it has 5 year warranty... its really frustrating

laviniuc · Apr 1, 2015

100kbps write(probably pagefile)
disable pagefile temporary to see if it makes any difference.

sz0ty0l4 · Apr 1, 2015

no difference. latest benchmark is even worse. random reads dropped down to 20000 from 97000....

Any idea where can i contact official samsung SSD support? failed to find any email support or ticket or something on their site..

sz0ty0l4 · Apr 1, 2015

BUMP. please someone give me ideas... should i bother reinstalling windows to see if it may fix the issue?? or just RMA the ssd?

laviniuc · Apr 1, 2015

check the s.m.a.r.t. attributes if it's failing it should have re-allocated sectors, heath should be < 100%

sz0ty0l4 · Apr 1, 2015

laviniuc :

i've made screenshot. can you check please?
http://postimg.org/image/mes0kt639/

screenshot of performance benchmark history to see the huge degradation:
http://postimg.org/image/gpcjgphq5/

laviniuc · Apr 1, 2015

turn on rapid mode too

laviniuc · Apr 1, 2015

and post a screenshot of the main magician page and one of the os optimization page

sz0ty0l4 · Apr 1, 2015

ohhh mate i solved the issue!!!!!!!

juppeeee no need for rma. i just changed the sata cable and now its back to 529/524 & 89600/85600. Probably one of the sata cables that came with my asus z97 was defective. after i changed and rebooted it automatically went up to advertised speeds.

Thank you for your patience and helpfulness.

laviniuc · Apr 1, 2015

ok, congratz

sz0ty0l4 · Apr 1, 2015

it was just a performance spike it seems... its back again to low read speed.. even random read drops to 30000 some benchmarks.
http://postimg.org/image/7onrpnrjl/

laviniuc · Apr 1, 2015

turn on rapid mode too
and post a screenshot of the main magician page and one of the os optimization page

sz0ty0l4 · Apr 1, 2015

http://postimg.org/image/hixh9o0wb/
http://postimg.org/image/g4ze13cvp/

enabling rapid mode results in +1GB RAM usage and abnormal benchmark results. like 4000/3000 140000/80000
most likely because its caching dram continusly. but i don't think this actually tells anything about the ssd's performance. it should reach at least 500/500 80000/80000 without enabling rapid mode .

sz0ty0l4 · Apr 1, 2015

I'll test it with AS-SSD benchmark program. if i get same slow seq read results, i'll try reinstalling windows 8.1 from scratch to see if it was a software issue... if still low seq read with new win8.1 i'll try RMA

edit: Problem is not with ssd, problem is this buggy samsung magician. I've tested the drive now with AS-SSD test and cristaldiskmark 3-3 times and while magician still gives 300/460 results, both as-ssd and cristaldiskmark is giving 530/520 results.

ssd 850 evo enormous slowdown without reason.

Distinguished

Judicious

Distinguished

Distinguished

Judicious

Distinguished

Judicious

Distinguished

Distinguished

Judicious

Distinguished

Judicious

Judicious

Distinguished

Judicious

Distinguished

Judicious

Distinguished

Distinguished

Share this page