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Samsung 840 Pro 256GB performance drop? Help, questions etc.

post #1 of 7
Thread Starter 
I built a pc for a friend of mine using a Samsung 840 Pro 256GB drive. These are the results of 3 performance tests I have taken over the past 8 days using the included Samsung Magician software. The first test was after the install and update of Windows 7. Samsung firmware was also updated. The next 2 tests were taken after various software installations. I didn't use overprovisioning, so it is whatever the stock setting is. I had 235GB of available storage out of 256.

Why such a sharp dropoff on the write IOPS?



Read Write Ran.R Ran Write
1 534 511 99240 88756

2 532 423 98704 70206

3 532 425 99984 53327
Edited by Oldguy - 1/26/13 at 2:21pm
post #2 of 7
steady state performance =/= max speeds.
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Le Main Rig
(17 items)
 
Terrorbyte V2
(17 items)
 
 
CPUMotherboardGraphicsRAM
i7-6700K Asus Sabertooth Z170 Mark 1 Gigabyte GTX 960 WindForce 2X OC G.SKILL Ripjaws V  
Hard DriveHard DriveHard DriveHard Drive
1050GB Crucial MX300 1050GB Crucial MX300 960GB OCZ RD400 1TB Micron M600 
Hard DriveCoolingOSMonitor
1TB WD Blue Noctua NH-U12S Windows 10 Pro 64-Bit BenQ GW2765HT 
MonitorKeyboardPowerCase
BenQ GW2765HT FUNC KB-460 Corsair RM650 Fractal Design R5 
Mouse
Logitec G500 
CPUCPUMotherboardRAM
Intel Xeon L5520 Intel Xeon L5520 SuperMicro X8DTi-F 48GB Nanya 1066MHz ECC RDIMM 
Hard DriveHard DriveHard DriveHard Drive
128GB Samsung 830 480GB SanDisk Extreme II 2TB WD Red 2TB Samung Spinpoint F4 
Hard DriveHard DriveHard DriveHard Drive
2TB Hitachi Deskstar 7K3000 1TB Samsung Spinpoint F3  3TB Toshiba DT01ACA300 Seagate Barracuda 7200.14 
OSPowerCaseOther
Windows Server 2012 R2 Datacenter  Corsair 650TX  Norco RPC 4224 LSI 9261-8i 
Other
Intel RES2CV240 
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Reply
post #3 of 7
Thread Starter 
Quote:
Originally Posted by Sean Webster View Post

steady state performance =/= max speeds.

Sorry, I don't understand what that means.
post #4 of 7
My 840 Pro failed after similar slowdowns.
post #5 of 7
This is bad news doh.gif
I have a feeling I'll regret that I did not take Plextor.
Edited by Unit Igor - 1/27/13 at 1:10pm
post #6 of 7
A unused SSD is always faster than a used one. Beside that, I don't thing you will regret your choice. The 840 PRO is one of the best drives you can get in the consumer market.
By the way, every little access on the SSD will change your benchmark scores. And windows does that some times =)
Instead of benching all the time you should do it once to check the speeds and then some time later when the system ran some weeks. Keep in mind, that every benchmark weakens your SSD.
post #7 of 7
Thread Starter 
The build is only 10 days old or so and I only ran a few benchmarks. The AS SSD tests were better.
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