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Any 27" Late 2015 iMac SSD Benchmarks?

The benchmarks on these Fusion Drives are really impressive. Thanks to all who have shared. Will be good to see some SSD figures this week as they start arriving, but I can't imagine they will be much higher, given that Fusion seems to have the same PCie set up on the SSD portion of the Fusion Drive.
 
I could probably do with the 512gb SSD but that's a top up of $300AUD and then I look at the 1TB and its $900AUD so Apple is saying the extra 512gb is worth close to twice the cost of the first 512?!?
 
I disabled the Fusion Drive.

SSD:

DiskSpeedTestSSD.png


HDD:

DiskSpeedTestHDD.png



Something seems to be wrong with the USB-Ports. 🙁 My Samsung 850 EVO connected with an USB 3.0 adapter is much too slow and it is does not work on every port.
My USB thumb drives are not working at all. At first one of them was recognized, but after trying to boot the El Capitan installer from it (which worked on several other Macs), it just disappeared completely. Reformatting on another Mac does not help. The other one has also not been recognized.

All three work fine on every port of my MacBookPro 2011. It has the same OS on it, but it has only USB 2.0.

iMac SSD on USB 3.0:

DiskSpeedTestUSB-SSD.png


MacBookPro SSD on USB 2.0:

SSDextern.png
 
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Why there is such a huge difference among read and write speed? I don't remember that happening on 2015 rMBP ssd.

Was not it about 1700mbs both read an write? What's wrong with write speed on the new iMac?
 
Kappsi said:
I ended up ordering an i7/M395 256GB SSD, but I'm rather worried about whether the SSD performance would be significantly slower than the 512GB, particularly as I've heard mixed things. Has anyone actually run benchmarks like Black Magic on these and is able to post them so we can see the difference? It would be much appreciated.
Click to expand...


Don't worry about it, even an SSD from 2008 is fast enough for most people's needs - we just have an obsession about having the fastest one. Unless you have an application that is particularly I/O intensive you won't notice you won't notice any difference in every day use I've had SSD's since 2007 and while the new PCI-e ones are nice, etc, etc the real world performance hasn't really changed much. Only people who spend their days running benchmark apps rather than doing real stuff will notice.
 
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Does anyone else have issues with USB or could help me please? Perhaps I should create a new thread about that.

This is my external SSD just tested on a newer MacBookPro with USB 3.0:

DiskSpeedTest.png
 
Juliovalverde said:
Why there is such a huge difference among read and write speed? I don't remember that happening on 2015 rMBP ssd.

Was not it about 1700mbs both read an write? What's wrong with write speed on the new iMac?
Click to expand...

If these are the Samsung SM951's inside the iMac, the 128GB version has significantly lower write speeds than the 256GB version. Will be interesting to see how the 256/512GB pure SSD benchmarks.
 
Erdbeertorte said:
Something seems to be wrong with the USB-Ports. 🙁 My Samsung 850 EVO connected with an USB 3.0 adapter is much too slow and it is does not work on every port.
My USB thumb drives are not working at all. At first one of them was recognized, but after trying to boot the El Capitan installer from it (which worked on several other Macs), it just disappeared completely. Reformatting on another Mac does not help. The other one has also not been recognized.
Click to expand...

I had that problem with some USB Superspeed hard drives and my imac Apparently, they weren't fully inserted. The USB 3.0 pins are located deep within the USB cable, so as to allow for backwards compatibility. If only the normal USB pins make contact, it's read as a "Up to 480 Mb/sec" device. Try ejecting it, unplugging it and plugging it back in again. You can use the "System Report" button to verify that it properly recognized.
 
Kappsi said:
I ended up ordering an i7/M395 256GB SSD, but I'm rather worried about whether the SSD performance would be significantly slower than the 512GB, particularly as I've heard mixed things. Has anyone actually run benchmarks like Black Magic on these and is able to post them so we can see the difference? It would be much appreciated.
Click to expand...

Just received my new mac (i7, 512GB SSD, 395x, 16GB).

DiskSpeedTest.png

Fast enough i would say...

Robert
 
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Hi Robert,

Impressive SSD scores and very interesting to see!

I think you're the first with a M395X and there are many many people here keen to see benchmarks for it. Would you be willing to download the free version of Cinebench and run it in OS X? Better still, would you be willing to run Bootcamp temporarily and run some free GPU benchmarks from there too?
 
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Max108 said:
Hi Robert,

Impressive SSD scores and very interesting to see!

I think you're the first with a M395X and there are many many people here keen to see benchmarks for it. Would you be willing to download the free version of Cinebench and run it in OS X? Better still, would you be willing to run Bootcamp temporarily and run some free GPU benchmarks from there too?
Click to expand...

Here the cinbench:
cinebench.png
No time for running bootcamp, must go to work. Sorry
 
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robert.moss said:
No problem, ups was quite fast with the delivery. Apple website said delivery 21-23.10. So i have the monday morning to play around...
Click to expand...

For me it's just after midday on Monday. The benchmark you posted is actually for the CPU I just noticed - the GPU is available from a dropdown on that window. How many hours before you're back with your Mac? 🙂
 
I bet you wish you didn't have to 😀

Thanks for posting that - it's informative and, together with some Windows based GPU benchmark results, will help people decide on whether or not the M395X is worth springing for...
 
The neat comparision would be if a m395 owner would run the cinebench in Mac OS X or if an m395x as robert.moss could run it on windows (the first option is easier)
 
yes i bet you will be very impres if from a generation to another the differences will be double or triple..change your life, on this life you will never see this
The last big improvement in the last decade was the so called ppi/retina and the diff between HDD and SSD
 
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