Overclock.net › Forums › Components › Hard Drives & Storage › SSD › Samsung 840 EVO read speed drops on old-written data in the drive
New Posts  All Forums:Forum Nav:

Samsung 840 EVO read speed drops on old-written data in the drive - Page 123

post #1221 of 3279
Before and after firmware update. Restoration still in progress.

post #1222 of 3279
Quote:
Originally Posted by trparky View Post

Why are people doing a RAID with these SSDs?
My reason is speed > 800 MB/s from multiple satas ports. Limit 530MB/s on one sata port with one ssd.
Without doing a firmware update yet, my windows 7 ultimate boots in 20 seconds, happy with that
post #1223 of 3279
Quote:
Originally Posted by trparky View Post

Why are people doing a RAID with these SSDs?

    To get speeds of 1 or 2 GB/s instead of just 500 MB/s.  I know that with audio CD mastering, the biggest source of wasted time is caused by waiting for trivial audio effects to finish processing, as the whole multi-GB audio file gets read and written each time.
My desktop PC
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7-3770K Gigabyte P67A-D3-B3 NVIDIA GeForce 8400 GS  1x Corsair 8 GB 
Hard DriveHard DriveHard DriveOS
Kingston SV300S3 WesternDigital WD10EZEX Samsung HD154UI Windows 7 Ultimate SP1 x64 
MonitorMonitorKeyboardPower
Daewoo L947BK Gateway FPD1530 HTK-2001 Dynex DX-400WPS 
MouseAudio
Kensington K72400 Realtek ALC889 
  hide details  
Reply
My desktop PC
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7-3770K Gigabyte P67A-D3-B3 NVIDIA GeForce 8400 GS  1x Corsair 8 GB 
Hard DriveHard DriveHard DriveOS
Kingston SV300S3 WesternDigital WD10EZEX Samsung HD154UI Windows 7 Ultimate SP1 x64 
MonitorMonitorKeyboardPower
Daewoo L947BK Gateway FPD1530 HTK-2001 Dynex DX-400WPS 
MouseAudio
Kensington K72400 Realtek ALC889 
  hide details  
Reply
post #1224 of 3279
Quote:
Originally Posted by pmachado View Post

I read that post and my system was already using the MS AHCI drivers. So I tried installing the AMD driver and it still didn't work. I then did a rollback to the MS drivers and I got it to work! thumb.gif

Thanks for everyone for the help. Going to do a benchmark with he MS drivers and AMD drivers to see what the difference is on my system.

Going to be very interested in those numbers smile.gif

From MS to Intel drivers, I don't think I gain more than 1-5% and might just be run to run differences
Foot Warmer
(11 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 4670k @ 4.2ghz core/4ghz uncore MSI Z87 G45 Gaming Powercolor Radeon R9 280 OC 16GB G.Skill Ripjaws X 1866mhz 
Hard DriveHard DriveCoolingMonitor
2TB Seagate Barracuda 7200.14 128GB Adata SP920  Corsair H80i  LG 22EN33 
PowerCaseMouse
Corsair CX600v2.3 Antec 302 Zalman M200 
  hide details  
Reply
Foot Warmer
(11 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 4670k @ 4.2ghz core/4ghz uncore MSI Z87 G45 Gaming Powercolor Radeon R9 280 OC 16GB G.Skill Ripjaws X 1866mhz 
Hard DriveHard DriveCoolingMonitor
2TB Seagate Barracuda 7200.14 128GB Adata SP920  Corsair H80i  LG 22EN33 
PowerCaseMouse
Corsair CX600v2.3 Antec 302 Zalman M200 
  hide details  
Reply
post #1225 of 3279
For those interested, here are the MS AHCI vs AMD read speed comparisons immediately after Rejuv'ing an 840 EVO 250G attached to AMD SB 850/950.
Warning: Spoiler! (Click to show)

Fig. 1. Trace showing read speed soon after Rejuve completion - MS AHCI Driver

Warning: Spoiler! (Click to show)

Fig. 2. Trace showing read speed after switching back to AMD driver and rebooting

Note: rhythmic pulses in read speed roughly every 75GB on the AMD trace do not appear to actually be related to "physical" (cough) locations on the SSD. Rather, they seem to be timing /activity bursts by chipset &/or background application. Since they don't show up in the MS Driver trace, they must be related to AMD's secret sauce for squeezing out the 10-15% bump in performance. With the AMD driver, access time and CPU% are reduced, while burst speed (and other speeds) are increased.

Would be interested in seeing Intel driver comparison.
Warning: Spoiler! (Click to show)
Windows 7 Ultimate (64 bit)
AMD FX-8350 at stock speed
16G DDR3 Ram (at 1866 MHz)
AMD drivers 14.9 (which includes AMD "SATA Controller" 1.2.1.359 11/6/2013
System Details
Edited by HurnII - 10/19/14 at 2:52am
post #1226 of 3279
I seem to be having a problem with HD Tach's results:

8MB zones:


32MB zones:


As you can see, in both tests the speed oscillates between 250MB/s and just over 400MB/s; I have used the performance restoration tool and the SSD is hooked up to an intel SATA 3 port so I should be seeing a smoother flat line of about 500MB/s like you guys are. This is on a new install even though performance was similar on the previous install. I.have installed the latest chipset drivers and intel rst so I'm at a loss, any ideas?

intel i5 3570K
GIGABYTE GA-Z77X-D3H
Samsung 840 EVO 250GB
post #1227 of 3279
Try a different program and if that works fine, ignore the HDTach results. tongue.gif
post #1228 of 3279
Quote:
Originally Posted by TekWarfare View Post

I seem to be having a problem with HD Tach's results:

8MB zones:


32MB zones:


As you can see, in both tests the speed oscillates between 250MB/s and just over 400MB/s; I have used the performance restoration tool and the SSD is hooked up to an intel SATA 3 port so I should be seeing a smoother flat line of about 500MB/s like you guys are. This is on a new install even though performance was similar on the previous install. I.have installed the latest chipset drivers and intel rst so I'm at a loss, any ideas?

intel i5 3570K
GIGABYTE GA-Z77X-D3H
Samsung 840 EVO 250GB

I'm getting a similar jittery results with a similar pc setup as you can see here.




But another run I'm getting that kinda result:




Was going to try a fresh install but it's good to see that you tried that and nothing has changed. So I won't go for a fresh windows install after this.

I think it's better to ignore these results unless we see a dramatic performance loss.

So far booting speed is fine, BF4 loading times are visually better than the previous firmware.
post #1229 of 3279
Quote:
Originally Posted by HurnII View Post

For those interested, here are the MS AHCI vs AMD read speed comparisons immediately after Rejuv'ing an 840 EVO 250G attached to AMD SB 850/950.
Warning: Spoiler! (Click to show)

Fig. 1. Trace showing read speed soon after Rejuve completion - MS AHCI Driver

Warning: Spoiler! (Click to show)

Fig. 2. Trace showing read speed after switching back to AMD driver and rebooting

Note: rhythmic pulses in read speed roughly every 75GB on the AMD trace do not appear to actually be related to "physical" (cough) locations on the SSD. Rather, they seem to be timing /activity bursts by chipset &/or background application. Since they don't show up in the MS Driver trace, they must be related to AMD's secret sauce for squeezing out the 10-15% bump in performance. With the AMD driver, access time and CPU% are reduced, while burst speed (and other speeds) are increased.

Would be interested in seeing Intel driver comparison.
Warning: Spoiler! (Click to show)
Windows 7 Ultimate (64 bit)
AMD FX-8350 at stock speed
16G DDR3 Ram (at 1866 MHz)
AMD drivers 14.9 (which includes AMD "SATA Controller" 1.2.1.359 11/6/2013
System Details

Thanks for the results. Looks like I'm going to be reinstalling the AMD SATA drivers, after all. smile.gif
Claire
(8 items)
 
Asus N56JR
(5 items)
 
Die "Neue" FXe
(11 items)
 
CPUMotherboardGraphicsRAM
AMD Ryzen 5 1600 ASRock X370 Taichi MSI Radeon R9 390 GAMING 8G G.Skill Flare X 3200 MHz CL14 
Hard DriveOSPowerCase
Samsung 960 EVO 500 GB Solus Seasonic SSR-550RM NZXT S340 Elite Matte White 
CPUGraphicsHard DriveOS
Intel Core i7-4700HQ GeForce GTX 760M Samsung 840 EVO 250 GB Microsoft Windows 10 Education 
Other
Intel Wireless-AC 7260 
CPUMotherboardGraphicsRAM
AMD FX-8120 Asus SABERTOOTH 990FX MSI Radeon R9 390 GAMING 8G G. Skill Ripjaws (DDR3-1600) 
Hard DriveOptical DriveCoolingOS
Samsung 840 EVO 250 Asus DRW-21B1ST Cooler Master Hyper 212 Evo Microsoft Windows 7 Home Premium 
PowerCaseAudio
Cooler Master RS-600-AMBA-D3 Cooler Master CM690 II Advanced Asus Xonar DG 
  hide details  
Reply
Claire
(8 items)
 
Asus N56JR
(5 items)
 
Die "Neue" FXe
(11 items)
 
CPUMotherboardGraphicsRAM
AMD Ryzen 5 1600 ASRock X370 Taichi MSI Radeon R9 390 GAMING 8G G.Skill Flare X 3200 MHz CL14 
Hard DriveOSPowerCase
Samsung 960 EVO 500 GB Solus Seasonic SSR-550RM NZXT S340 Elite Matte White 
CPUGraphicsHard DriveOS
Intel Core i7-4700HQ GeForce GTX 760M Samsung 840 EVO 250 GB Microsoft Windows 10 Education 
Other
Intel Wireless-AC 7260 
CPUMotherboardGraphicsRAM
AMD FX-8120 Asus SABERTOOTH 990FX MSI Radeon R9 390 GAMING 8G G. Skill Ripjaws (DDR3-1600) 
Hard DriveOptical DriveCoolingOS
Samsung 840 EVO 250 Asus DRW-21B1ST Cooler Master Hyper 212 Evo Microsoft Windows 7 Home Premium 
PowerCaseAudio
Cooler Master RS-600-AMBA-D3 Cooler Master CM690 II Advanced Asus Xonar DG 
  hide details  
Reply
post #1230 of 3279
I would think that the hardware developer's (either Intel or AMD) drivers would be the best since they know their own hardware forwards and backwards, inside and out. Whereas the Microsoft provided generic SATA controller drivers are just that, generic drivers that are meant for just about any modern day SATA controller and are not at all optimized for use on any specific SATA controller (because then they wouldn't be generic anymore).
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: SSD
Overclock.net › Forums › Components › Hard Drives & Storage › SSD › Samsung 840 EVO read speed drops on old-written data in the drive