Samsung 840 on BlackMagic Speed Test ?

drsox

macrumors 68000
Original poster
Apr 29, 2011
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Xhystos
Just tried out my new Samsung 840 on BlackMagic and I get these strange results : Write : 130 MBps. Read : 497 MBps.
Same test on my MacBook Air is : Write : 175MBps. Read : 200 MBps.

?

Something wrong with my Samsung or with the Mini ?

What else might I test ?

Time to send both of them back (still within the return window !) ?
 

drsox

macrumors 68000
Original poster
Apr 29, 2011
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Yes, you are right - it is the 120GB version. I'm just surprised that the Write speed should be as low as 130MBps.

I guess it is within spec after all.

Thanks
 

dannyp1996

macrumors member
Apr 15, 2011
63
0
United Kingdom
Yes, you are right - it is the 120GB version. I'm just surprised that the Write speed should be as low as 130MBps.
I just thought I'd add that the most important factor in evaluating the possible real world performance of an SSD is the read speed. This determines how quickly things like the OS startup and program opening will be. I presume this is why you chose an SSD in the first place anyway.
 

drsox

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Apr 29, 2011
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I just thought I'd add that the most important factor in evaluating the possible real world performance of an SSD is the read speed. This determines how quickly things like the OS startup and program opening will be. I presume this is why you chose an SSD in the first place anyway.
Yes, thanks. I knew that, but the file write rates for big files did seem to be slow on this new Mini. Now I know why. I've been using SSDs for more than 5 years and I would never go back to HDDs for OS/programme files for just that reason.
 

blanka

macrumors 68000
Jul 30, 2012
1,549
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That is the weird thing with the 840 series. It is completely different on write performance compared to the old 830 and the 840pro. Especially the smaller ones.
 

drsox

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Original poster
Apr 29, 2011
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That is the weird thing with the 840 series. It is completely different on write performance compared to the old 830 and the 840pro. Especially the smaller ones.
I think that's why I was surprised - I had an 830 and would have expected the 840 to be better. I think I'll look at swapping out for the 840 pro.
 
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venom600

macrumors 6502a
Mar 23, 2003
947
687
Los Angeles, CA
I think that's why I was surprised - I had an 830 and would have expected the 840 to be better. I think I'll look at swapping out for the 840 pro.
Another thing to consider is that black magic isn't a good indicator of SSD speed all the time. My Intel 330 SSD scores low in writes because the drive natively compresses content on the fly. Since black magic tests video write performance, and video is already compressed, it writes much more slowly.
 

dmk1974

macrumors 68020
Sep 16, 2008
2,200
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Another thing to consider is that black magic isn't a good indicator of SSD speed all the time. My Intel 330 SSD scores low in writes because the drive natively compresses content on the fly. Since black magic tests video write performance, and video is already compressed, it writes much more slowly.
I am going to be upgrading my 2012 Mac Mini today and have 2 SSD drives that are currently in Windows PC's that I am going to choose from.

128 GB Samsung 830 SSD
240 GB Intel 330 SSD

In Windows, I think they bench about the same. Per threads I've searched, with BlackMagic, the Sammy is pretty fast. Just haven't found actual numbers on the Intel 330.

I don't need a ton of space on the OS drive since I have an external USB 3.0 drive connected for all my media. Just want to pick whichever one will be faster. Thanks!
 

willgreene99

macrumors regular
Dec 16, 2010
217
15
DFW
I just completed upgrading my Mac Mini 6,2 with dual Samsung 840 Pro's 256GB. Wow, compared to the stock 5400rpm drives, it is like a totally new feeling. I followed the instruction on OWC's website and it was accurate except for the part about removing the wi-fi/bluetooth antenna. There is a double layer black sticky cover over the connector. Other than that, everything else was spot on. I installed ML and all of my apps. Ran Black Magic and getting read speeds of 469MB/s and write speeds of 502MB/s.

This upgrade was definitely worth it. I bought the drives at Fry's for $240 each.
 

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dmk1974

macrumors 68020
Sep 16, 2008
2,200
142
I am going to be upgrading my 2012 Mac Mini today and have 2 SSD drives that are currently in Windows PC's that I am going to choose from.

128 GB Samsung 830 SSD
240 GB Intel 330 SSD

In Windows, I think they bench about the same. Per threads I've searched, with BlackMagic, the Sammy is pretty fast. Just haven't found actual numbers on the Intel 330.

I don't need a ton of space on the OS drive since I have an external USB 3.0 drive connected for all my media. Just want to pick whichever one will be faster. Thanks!
Here's the BlackMagic DiskSpeedTest result I got a few weeks ago with the 240 GB Intel 330 SSD drive inside. Anyone have a screen shot for a 128 GB Samsung 830 in a 2012 Mac Mini? Thanks!
 

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drsox

macrumors 68000
Original poster
Apr 29, 2011
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Xhystos
Here's the BlackMagic DiskSpeedTest result I got a few weeks ago with the 240 GB Intel 330 SSD drive inside. Anyone have a screen shot for a 128 GB Samsung 830 in a 2012 Mac Mini? Thanks!
deleted
 

DanFromNYC

macrumors newbie
Jul 5, 2013
1
0
Performance is slow

I recently upgraded my mac mini late 2012 with the Samsung 840 pro 512g. I bought the mac mini with the fusion drive but i ran out of space so i purchased the new drive and installed it with the existing apple cables and the new hard drive.

1) I did not create new fusion drive
2) I cloned my hard drive.
3) I ran the blackmagic performance test
Write: 100
Read: 300

Can anyone give me any suggestions on how to improve my SSD read/write performance?
Thanks
Dan
 

flottenheimer

macrumors 65816
Jan 8, 2008
1,189
168
Up north
Bump (since I am seriously SSD excited right now).

Just installed the Samsung 840 Pro 512 GB SSD in my 15", Medio 2012 MacBook Pro (2.3Ghz, i7, 8GB RAM, Hires)

BlackMagic scores
Write: 489 MB/s
Read: 512 MB/s

Wow. Loving my MacBook — it is a beast reborn.
 

drsox

macrumors 68000
Original poster
Apr 29, 2011
1,520
60
Xhystos
Bump (since I am seriously SSD excited right now).

Just installed the Samsung 840 Pro 512 GB SSD in my 15", Medio 2012 MacBook Pro (2.3Ghz, i7, 8GB RAM, Hires)

BlackMagic scores
Write: 489 MB/s
Read: 512 MB/s

Wow. Loving my MacBook — it is a beast reborn.
Good for you.
 

Geron

macrumors newbie
Dec 14, 2013
6
0
Get yourself a TRIM enabler. It changed the performance of mine drastically.
 

kaibob

macrumors regular
Jun 21, 2010
235
64
Prescott, Arizona
I recently switched to an SSD boot drive in a USB 3.0 docking station and thought I would post my results. I did not want to start a new thread and instead added to this older one.

My equipment is:

2012 base Mac mini upgraded with 16-GB of memory

Plugable USB 3.0 Lay-Flat docking station from Amazon

Samsung 128-GB 840 Pro

I used SuperDuper to clone from the internal hard drive to the SSD. I then reset the start-up disk in system preferences to the SSD.

The computer boot time went from 30 to 20 seconds--I had expected a greater difference. Blackmagic results are 433 MB/s read and 424 MB/s write. The read speed is in line with Anandtech test results, but the write speed is a bit higher. In day to day use, the computer is noticeably more responsive, and the docking station appears to sleep when expected. All in all, a good result.
 
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