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Samsung 840 Pro: Poor write speeds :(

post #1 of 6
Thread Starter 
Can't get around it guys! Latest sata 3 drivers , trim on , also messed around with c-states but still nothing! Could use some help confusedsmiley.png

SY9fiZK.jpg


Update, ATTO showing different results?thinking.gif


LtAXQnC.jpg
Edited by Supreme888 - 8/1/13 at 1:57am
    
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post #2 of 6
Wow, worst write speeds ever in the Samsung benchmark. The ATTO results compared to the Samsung are bizarre, although ATTO can make any drive look good.

I assume Windows 7 at least, since you mentioned TRIM. The "latest SATA 3 drivers" statement is curious, no driver is rated as SATA II or III, are you using Intel RSTe, or IRST?

The Samsung test with terrible writes hints at an OS misalignment, download and run AS SSD (free), which will show your SATA mode, driver, and alignment.
post #3 of 6
Thread Starter 
Win7, I had cloned the ssd from my HD. I'm on IRST


After align:


Edited by Supreme888 - 8/2/13 at 2:37am
    
CPUMotherboardGraphicsRAM
Intel i7 3930k  Rampage Extreme IV  MSI N680GTX Lightning  G.SKILL 32GB 2133Mhz 
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Samsung 840 Pro 256GB Corsair H100  XFX 1000w Black Edition Platinum  Caselabs M8 
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CPUMotherboardGraphicsRAM
Intel i7 3930k  Rampage Extreme IV  MSI N680GTX Lightning  G.SKILL 32GB 2133Mhz 
Hard DriveCoolingPowerCase
Samsung 840 Pro 256GB Corsair H100  XFX 1000w Black Edition Platinum  Caselabs M8 
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post #4 of 6
The info tab in AS-SSD is lacking a number of entries, like SSD model and driver name (should be iaStorA). I would try
- uninstalling the IRST drivers
- checking performance with MS drivers
- and possibly re-installing latest IRST drivers
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post #5 of 6
Ah, clones, if that was on the same PC, from HDD to SSD, it did not go perfectly.

I would suggest running the INF file installer for your board, since as BrainSplatter said, basic information is missing from the AS SSD display.

Did you clear the BIOS after the clone? That helps to clear up confusion in Windows, etc. Don't forget to reset your BIOS settings if you do.

Did you reboot after the alignment?

The AS SSD results are weird. It looks like the SATA mode is AHCI, given the 4K-64Thrd read results, but the write speeds, besides sequential, are still terrible.

It seems like the clone or something has written to all the NAND on that SSD, causing huge write amplification. The misalignment of course did a similar thing, every write done in the unaligned state caused multiple writes to occur, as the SSD's firmware struggled to write things correctly.

Have you run the SSD Optimizer in the Magician software? Even if you have, do it again now that the SSD seems to be aligned. That might clean things up for you quite a bit. Before doing that, I would suggest doing a Windows Disk Cleanup on the SSD, and then run the Optimizer.
post #6 of 6
Make sure that there is no defragmentation task scheduled since that's not necessary for a SSD, instead it will only create a huge amount of unnecessary writes.
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Fun
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CPUMotherboardGraphicsRAM
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Hard DriveHard DriveOptical DriveCooling
Samsung 830 256GB 4 x Samsung EVO 850 1TB RAID0 Samsung Blu Ray Cooler Master Seidon 240M 
OSMonitorKeyboardPower
Windows 7 Professional 64 bit Samsung 27" IPS 2560x1440 Logitech Wireless Seasonic Platinum 860 
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