Samsung 840 SSD write speed absymally low

simaomacaco · May 2, 2015

Hello clever people,

I just bought another SSD (Crucial MX100) and was benching it against my existing Samsung 840 which I use as primary partition. In doing so I get the following results:

Two disks:
..samsung 840 is 150/250gb full, ACHI on, condition good, write caching OFF
..crucial mx100 is 100/500gb full

Both are using

using ATTO:

Samsung 840 results: Awful write speeds

Curical results: Seems a good job, pretty fast and meets the stated specifications.

Any thoughts on what I can do to determine why the Samsung is performing like an old tart?

m6tzg6r · May 2, 2015

840 EVO? Yeah they have an issue with degraded performance. But there is a firmware update to fix it i believe.

I own a 250gb and a 500gb 840 EVO but havnt seen any issues. I did update the firmware last week for the hell of it.

P4-630 · May 2, 2015

http://www.samsung.com/global/business/semiconductor/minisite/SSD/us/html/support/downloads.html

Ruyki · May 2, 2015

The common 840 EVO performance degradation issue is that read speed of old files is slow. Slow reads of new files and writes are not explained by it. You may have another problem.

Try another cable and port.

Aquinus · May 2, 2015

Could we get a screenshot of the SMART attributes for the Samsung drive?

simaomacaco · May 2, 2015

Okay, I think this is revealing.

Samsung 840 pro

New Crucial MX100 shows:

jsfitz54 · May 2, 2015

SEE: http://www.techpowerup.com/forums/threads/fyi-samsung-840-evo-fix-in-the-works.211963/

Also, if you cloned from spinning HD, then do a fresh reinstall of OS directly to SSD.

Use current Firmware.

Use Samsung Magician 4.6. "Performance Optimization", "Advanced Tab"

flappyone · May 24, 2015

simaomacaco said:
Okay, I think this is revealing.

Samsung 840 pro

There are C7 - CRC Error counts. In 99% they are related to a lose or broken SATA cable. If the Cable is broken, the raw value will increase. You should change the cable and check the status again after a short time. Compare it. If the value stays at B5, it is fine. (It will not decrease or reset ever)

Processor	QX9650, 4@1.36v 11x365
Motherboard	Asus p45q-e
Cooling	Prolimatech Super Mega Cooler (Akasa Viper push/pull)
Memory	OCZ 8GB (4x2GB) PC2-6400C4 800MHz ReaperX HPC Enhanced Bandwidth Edition Dual Channel DDR2
Video Card(s)	HIS 6970 ATI HD
Storage	1TB
Display(s)	30" dell 3008, 2x19" samsumg syncmaster
Case	Antec P180
Audio Device(s)	PCI XFi SB
Power Supply	800wat Tagan
Software	Windows 7 x64
Benchmark Scores	14500 3dmark 06 @ 2500x1600 8AA 22000 3dmark 06 @ defaults 4800 3dmark 11 @ defaults

Processor	Intel Core i7 9700KF @4.4
Motherboard	Gigabyte Z390M Gaming
Cooling	Noctua NH-U9S / NA-FC1+Noctua and Be Quiet! Fans
Memory	Corsair LPX DDR4 32GB 3200MHZ
Video Card(s)	Asus Dual RTX 3060 12GB
Storage	Samsung 970 EVO 500GB NVMe
Display(s)	MSI G244F + Dell P1914S
Case	Be Quiet! Pure Base 500 Black
Audio Device(s)	A] Onboard > Logitech Z623 B] Denon DRA-295 > JM Lab Cobalt 810
Power Supply	EVGA G+ 650W with APC 1400VA UPS
Mouse	Asus Strix Carry + Corsair MM300
Keyboard	Ducky One 2 TKL MX Silver
Software	Win 10 64Bit

System Name	AlderLake / Laptop
Processor	Intel i7 12700K P-Cores @ 5Ghz / Intel i3 7100U
Motherboard	Gigabyte Z690 Aorus Master / HP 83A3 (U3E1)
Cooling	Noctua NH-U12A 2 fans + Thermal Grizzly Kryonaut Extreme + 5 case fans / Fan
Memory	32GB DDR5 Corsair Dominator Platinum RGB 6000MHz CL36 / 8GB DDR4 HyperX CL13
Video Card(s)	MSI RTX 2070 Super Gaming X Trio / Intel HD620
Storage	Samsung 980 Pro 1TB + 970 Evo 500GB + 850 Pro 512GB + 860 Evo 1TB x2 / Samsung 256GB M.2 SSD
Display(s)	23.8" Dell S2417DG 165Hz G-Sync 1440p / 14" 1080p IPS Glossy
Case	Be quiet! Silent Base 600 - Window / HP Pavilion
Audio Device(s)	Panasonic SA-PMX94 / Realtek onboard + B&O speaker system / Harman Kardon Go + Play / Logitech G533
Power Supply	Seasonic Focus Plus Gold 750W / Powerbrick
Mouse	Logitech MX Anywhere 2 Laser wireless / Logitech M330 wireless
Keyboard	RAPOO E9270P Black 5GHz wireless / HP backlit
Software	Windows 11 / Windows 10
Benchmark Scores	Cinebench R23 (Single Core) 1936 @ stock Cinebench R23 (Multi Core) 23006 @ stock

System Name	maipc
Processor	4790k @ 4.4Ghz / 1.16v
Motherboard	Asus vii hero
Cooling	Noctua NH-D14
Memory	16GB (2x8GB) Hyperx fury 1866 / CL10
Video Card(s)	MSI RTX 3060 Ti Gaming X 8GB
Storage	1TB 860EVO + 1TB 860EVO + 4TB WD Red + 4TB WD Red
Display(s)	Asus VG259QM (1080p IPS 240Hz)
Case	Cooler Master Centurion 6
Power Supply	Seasonic Prime GX-650
Mouse	Logitech G Pro X Superlight
Keyboard	Wooting 60HE
Software	Win 10 64bit

System Name	Apollo
Processor	Intel Core i9 9880H
Motherboard	Some proprietary Apple thing.
Memory	64GB DDR4-2667
Video Card(s)	AMD Radeon Pro 5600M, 8GB HBM2
Storage	1TB Apple NVMe, 4TB External
Display(s)	Laptop @ 3072x1920 + 2x LG 5k Ultrafine TB3 displays
Case	MacBook Pro (16", 2019)
Audio Device(s)	AirPods Pro, Sennheiser HD 380s w/ FIIO Alpen 2, or Logitech 2.1 Speakers
Power Supply	96w Power Adapter
Mouse	Logitech MX Master 3
Keyboard	Logitech G915, GL Clicky
Software	MacOS 12.1

Samsung 840 SSD write speed absymally low

simaomacaco

Attachments

m6tzg6r

P4-630

Ruyki

Aquinus

Resident Wat-man

simaomacaco

Attachments

jsfitz54

flappyone

New Member

Processor	Intel i7 970 // Intel i7 2600K
Motherboard	Asus Rampage III Formula // Asus P8P67 Deluxe
Cooling	Zalman CNPS9900MaxB // Zalman CNPS11X
Memory	GSkill 2133 12GB // Corsair V 2400 32GB
Video Card(s)	ASUS GTX1080 // MSI GTX1070
Storage	Samsung 870EVO // Samsung 840P
Display(s)	HP w2207h
Case	CoolerMaster Stacker 830se // Lian Li PC-9F
Audio Device(s)	onboard
Power Supply	Seasonic X 850w Gold // EVGA 850w G2
Mouse	Logitech G502SE HERO, G9
Keyboard	Dell
Software	W10 Pro 22H2