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[Official] Samsung SSD750/830/840/850 Owners Club - Page 382

post #3811 of 5733
Looks more less fine to me Sann wink.gif


All I know is im not flashing my 840 Pro until those release notes say "Increase Performance for System." <-- Notice my Korean talk, do I sound like Samsung ? LOL biggrin.gif
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Dreamland
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post #3812 of 5733
Quote:
Originally Posted by parsec View Post

In general read speed performance is not affected by the amount of free space available on a SSD unless it is performing GC to accommodate pending writes. So I'm reluctant to blame the free capacity of your SSD for the change in Read Access Time. Also, a single access time number for read or write is a simplification of reality, and I don't know if that is a best, worst, or average value. But it's all we get from AS SSD.

Frankly, looking at your AS SSD benchmarks, I noticed the differences that BradleyW mentioned. The offset is very different, and in the first one the SSD is identified as "Samsung 840 PRO Seri SCSI Disk De...", and in the second, "Samsung 840 PRO Series", with the same version of AS SSD. While both show "iastorA" as the driver, the driver may be a different version, given the identification as "SCSI" in one and not in the other.

Were those benchmarks done on the same PC, same OS, same IRST driver version? The offset looks like GPT formatted for the first one, and UEFI booting OS drive (541696K) for the second?

No big deal, just asking. BUT, driver differences, mother board differences, empty drive, OS drive, etc, all can and do influence benchmark results. IF the only difference between the first and second benchmark is the firmware (which is assuming a lot) then the firmware might be the cause of the difference. The decrease of ~15MB/s for 4K Write is within the margin of consistency for AS SSD, and also could be caused by an OS being installed and used on the second benchmark.

I would also say that the 840 Pro never quite reached 40MB/s for 4K read, the EVO is the first SSD to do that in AS SSD. Over time all SSDs that are used and not secure erased will be in their steady state performance, which is slower than a new, empty drive.

So IMO it's a bit early to declare the new firmware has increased read latency, but time and other benchmarks will tell.

Thanks for the in depth answer. I only formated my SSD, (like 2 months ago) i didn't do anything, i tested with the same drivers, which i tested before, all is same the only thing changed is the firmware. Now it could be that i have only 50GB free, but keep in mind i have 25% OP, so i think it should make no difference, but anyway.

And about 4K Read 40mb/s i'm sure it was, with the initial firmware, but there was some problems i think, and they released second firmware which never get to those speeds again, maybe they push it to hard, and then decided to go for reliability for a bit lower performance? i don't know...

BTW are you suggesting, that i should do secure erase, worth it?
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post #3813 of 5733
Quote:
Originally Posted by psyside View Post

Thanks for the in depth answer. I only formated my SSD, (like 2 months ago) i didn't do anything, i tested with the same drivers, which i tested before, all is same the only thing changed is the firmware. Now it could be that i have only 50GB free, but keep in mind i have 25% OP, so i think it should make no difference, but anyway.

And about 4K Read 40mb/s i'm sure it was, with the initial firmware, but there was some problems i think, and they released second firmware which never get to those speeds again, maybe they push it to hard, and then decided to go for reliability for a bit lower performance? i don't know...

BTW are you suggesting, that i should do secure erase, worth it?

Thanks, just wanted to check the details since they can make a big difference.

Given your 25% OP and remaining free space, you should not be seeing much if any performance reduction, and IMO you aren't seeing much besides the Read latency. Note that all the performance reduction you have is all in the write performance, all the read performance (except 4K) increased a bit, in spite of the read latency increase. The write performance reduction could be, IMO, the erratic nature of AS SSD, which OTOH might be so sensitive that it reveals any difference in performance due to other factors.

My question is, is the offset shown currently, after the format two months ago, the same before and after the firmware update? Hard to believe it was caused by the firmware. Plus that is an odd offset for Windows 7, given your system specs, and if you formatted the SSD as MBR rather than GPT.

I don't recall any 840 Pros at 40MB/s 4K read in AS SSD, posted in this thread or the AS SSD thread. The best I ever had personally is this:



Close, but not quite 40MB/s 4K Read. Not worth quibbling over (then why am I...). That BTW is a brand new, empty 840 Pro.

I'm not suggesting a SE, just saying a SE would be a fresh start on the SSD, and the affects of longer term, normal usage would not be a factor in the benchmark results.
post #3814 of 5733
I use windows 8.1, and i have no idea what happened lol. All i did is left 25% OP and press next....no offset was set or anything mind you. Some of the tests i made where on windows 7, and some on Windows 8.1 but i forgot to make a note in order to tell them apart.

Now, can you please do one AS-SSD bench for me i know its different system but anyway smile.gif

P.S. As you can see, look at those 4K scores with the old firmware. 322 mb/s write 4K 64 thrd vs mine 269, thats too big of a difference to say its coincidence, no way. Also 0.37 read latency...vs 0.75..

I'm almost sure they lowered the performance to favor reliability, nothing else can be the case.
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My System
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post #3815 of 5733
Hey everyone, got my new CPU+Mobo+GPU in the mail the other day. I want to wipe my SSD and HDD clean and do a fresh install, since my friend is gonna give me a Windows 8.1 key.

So what is the "best" and safest way to wipe my SSD and HDD (If anyone can answer for HDD)?

Thanks!

Edit: I mean Format my SSD and HDD not wiped. Should be the same meaning lol.
post #3816 of 5733
Quote:
Originally Posted by SinX7 View Post

Hey everyone, got my new CPU+Mobo+GPU in the mail the other day. I want to wipe my SSD and HDD clean and do a fresh install, since my friend is gonna give me a Windows 8.1 key.

So what is the "best" and safest way to wipe my SSD and HDD (If anyone can answer for HDD)?

Thanks!

Edit: I mean Format my SSD and HDD not wiped. Should be the same meaning lol.
Just do a diskpart clean command (not "clean all," just clean) on them then quick format.
post #3817 of 5733
Anyone updated the latest firmware with 840 Pro can post AS-SSD benchmark? thanks.
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My System
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post #3818 of 5733
Quote:
Originally Posted by psyside View Post

Anyone updated the latest firmware with 840 Pro can post AS-SSD benchmark? thanks.
First there is no chance you saw 40mb/s with 840 PRO .I overclock my CPU to 5ghz so I can make AS-SSD benchmark and the highest it can go is 38mb/s,
It can be really easy that with new firmware access time has rise up.It would not be the first time I saw that and that's way I never updated my 840 PRO.Dont fix it if its not broken!!
How much I can remember there was people that updated 840 PRO firmware and they were not happy with it.
Second and the last thing your two benchmark are showing different prefix(if I can call it that way)for drive.The first benchmark has showing SCSI Disc Devices while other benchmark don't showing that so it has to be some change in bencmarking.Or you have different Intel RST drivers or you have different OS(7 vs.8),
So the SCSI has come with Intel RST 11.5 ,how much I can remember there was talking how that(SCSI) was made for Windows 8 and that in Windows 8 everything will set up and we will not see SCSI any more only name of drive,i have now 12.8 on my Win 8 notebook and I really don't see SCSI.While probably I would see it if I have Windows 7.
Why I am saying this ,only to prove you that your two benchmark has to be different ,or driver ,or Windows.
Edited by Unit Igor - 3/15/14 at 5:03am
post #3819 of 5733
I said that its on different OS most likely, but 2x the access time just can't be normal.

Is it possible to go back to older firmware?

Can you do an AS-SSD for me please?
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WD Blue EZEX 1TB & Samsung 840 Pro 256GB (OS) Asus Nocuta NH D14 WIN 7 64 Ultimate 
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My System
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i5 2500K @4.7ghz(1.39v) 24/7 +D14 Asus P8Z77-V Sapphire R9 290 Tri X @1160/1600 8GB HyperX @2133 
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WD Blue EZEX 1TB & Samsung 840 Pro 256GB (OS) Asus Nocuta NH D14 WIN 7 64 Ultimate 
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NEC 2490wuxi (rev 1) Logitech Wave Cooler Master Vanguard 850W Cooler Master HAF 932 
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post #3820 of 5733
Sorry i have only RAID 0 results.If you want that here it is
cpu 5ghz:

standard i think 4ghz:
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