Installed new Samsung 840 250GB Question

[Lazermonkey]

Hey guys,

I just installed a new Samsung 840 250GB SSD.

I ran the performance tool and it gave me these numbers.

The top numbers seem to be okay and in range.

The bottom numbers (especially the read side) have me concerned.

Shouldn't this SSD be faster than this?

Also, I have windows 7 and DO NOT have SP1 installed, would that make a difference?

Here is a screen shot.

TIA for any and all responses

[/IMG]

 

[1nf3rn0x]

Seems like random read and write aren't what they should be, but I'm not really sure.

 

[Lazermonkey]

http://img.techpowerup.org/130405/Untitled.png

Seems like random read and write aren't what they should be, but I'm not really sure.

See what I'm saying?

The numbers seem to be off.

 

[drdeathx]

Performance tips:

http://www.techradar.com/news/compu...ps-to-optimise-your-drives-performance-943984

 

[RCoon]

I can only assume you have it plugged in to a Sata III port on the motherboard that is wired direct into the board, not some stupid media controller card motherboards come with?
Otherwise the normal read and write is fine, sequencial is all retarded like.

 

[Lazermonkey]

http://img.techpowerup.org/130405/Untitled.png

Seems like random read and write aren't what they should be, but I'm not really sure.

Exactly.

My system specs are listed in my info.

I have everything set up right. Well, I think I do?

AHCI and all that is correct.

 

[Lazermonkey]

I can only assume you have it plugged in to a Sata III port on the motherboard that is wired direct into the board, not some stupid media controller card motherboards come with?
Otherwise the normal read and write is fine, sequencial is all retarded like.

Correct.

It is plugged in directly to the board.

 

[drdeathx]

I can only assume you have it plugged in to a Sata III port on the motherboard that is wired direct into the board, not some stupid media controller card motherboards come with?
Otherwise the normal read and write is fine, sequencial is all retarded like.

write speeds are not fine at 250Mb/s

 

[RCoon]

write speeds are not fine at 250Mb/s

according to the specs posted above they are

 

[drdeathx]

Run ATTO:

http://www.techpowerup.com/downloads/1749/ATTO Disk Benchmark v2.46.html

Take a screenie and post it.

 

[repman244]

write speeds are not fine at 250Mb/s

250 MB/s is spot on for this drive.

Exactly.

My system specs are listed in my info.

I have everything set up right. Well, I think I do?

AHCI and all that is correct.

Did you try running any other benchmark programs? Try Anvil Storage Utilities and see what kind of IOPS you get.

 

[RCoon]

Quoted from retailers:

The performance of the 256GB models is below so you can compare. (IOPS = In out Operations per Second)

Samsung 830 SSD | Read 520MB/s (IOPS 80k) Write 400MB/s (IOPS 36k)

Samsung 840 SSD | Read 540MB/s (IOPS 96k) Write 250MB/s (IOPS 62k)

Samsung 840 PRO SSD | Read 540 MB/s (IOPS 100k) Write 520MB/s (IOPS 90k)

 

[drdeathx]

Quoted from retailers:

The performance of the 256GB models is below so you can compare. (IOPS = In out Operations per Second)

Samsung 830 SSD | Read 520MB/s (IOPS 80k) Write 400MB/s (IOPS 36k)

Samsung 840 SSD | Read 540MB/s (IOPS 96k) Write 250MB/s (IOPS 62k)

Samsung 840 PRO SSD | Read 540 MB/s (IOPS 100k) Write 520MB/s (IOPS 90k)

I think he needs to verify exactly what model he has....... 1nF posted different specs....... looks like you may be correct.

 

[Lazermonkey]

Run ATTO:

http://www.techpowerup.com/downloads/1749/ATTO Disk Benchmark v2.46.html

Take a screenie and post it.

Here is a screen shot.

[/IMG]

 

[Lazermonkey]

I think he needs to verify exactly what model he has.......

I did.

Samsung 840 250GB

It is the numbers in the bottom of my first post.

the IOPS numbers on the read side.

 

[drdeathx]

I did.

Samsung 840 250GB

According to Rcoon's specifications, read and write are on the button. Iops aren't.

Try these performance tweaks:

http://www.techradar.com/news/compu...ps-to-optimise-your-drives-performance-943984

 

[Lazermonkey]

According to Rcoon's specifications, read and write are on the button.

Yes. But, what about those other numbers on the bottom of my first post?

I don't know if they are within specs?

 

[repman244]

ATTO doesn't measure IOPS...

For you to compare (taken from a review site):

 

[RCoon]

Yes. But, what about those other numbers on the bottom of my first post?

I don't know if they are within specs?

try increasing the 8192 to say, double the size. 16000k. You might see the IOPS increase to what they should be. Transfer speeds improve the larger the file. Companies tend to over estimate the speed of their drives by bursting larger files through the read/write process in order to improve their IOPS numbers.
My guess is your drive is working exactly as it should, you're just not seeing the same IOPS because they did a very specific not-so-life-like test on the drive to improve advertising.

 

[Lazermonkey]

try increasing the 8192 to say, double the size. 16000k. You might see the IOPS increase to what they should be. Transfer speeds improve the larger the file. Companies tend to over estimate the speed of their drives by bursting larger files through the read/write process in order to improve their IOPS numbers.

It will not let me go above 8192.

 

[RCoon]

It will not let me go above 8192.

no need to worry. its working fine, just a classic case of misleading advertising. not so misleading if you're transferring 4GB files constantly, however.

 

[Lazermonkey]

Here is from that Anvil run.

[/IMG]

 

[RCoon]

Here is from that Anvil run.

the one previous to this is benched as an SCSI drive, your benchmarks look perfectly normal

 

[Lazermonkey]

I am okay with the sequential results.

It's the random results which are confusing to me?

Maybe this is normal? I don't know?

Windows boots up in mere seconds and programs open in a flash. So maybe there is nothing to worry about?

I just wondered if there was a setting I may have been missing?

Thank you guys for all of your help and super fast responses.

that is what makes this place great

 

[repman244]

I am okay with the sequential results.

It's the random results which are confusing to me?

Maybe this is normal? I don't know?

Windows boots up in mere seconds and programs open in a flash. So maybe there is nothing to worry about?

I just wondered if there was a setting I may have been missing?

Thank you guys for all of your help and super fast responses.

that is what makes this place great

I think the results look okay (I tried it on my 840 Pro 256GB and get a bit lower results than on the one I posted), the drive tested there is empty as well.

I think the test Samsung provided uses average values as a results. The 96k is the maximum you can get in an ideal scenario (4K data and a queue depth of 32).