iMac 27" Skylake (Late-2015) GPU crash - please help me verify

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iMac 27" Skylake (Late-2015) GPU crash - please help me verify

Hi

My new iMac 27" Skylake crashes during heavy GPU work. It crashes under OS X and Windows 8.1/Bootcamp.

Is anyone else seeing this?

I can crash the machine easily when running the Heaven GPU benchmark. A few minutes into a benchmark and the system will crash with a two coloured crash screen.

I have a ticket open with Applecare who have collected logs and who have sent the ticket on to the iMac engineering team. While I wait for the outcome it would be great if anyone else who owns a new Skylake iMac could help me out by also running the Heaven benchmark and seeing if their systems crash?

It's located here:

https://unigine.com/products/benchmarks/heaven/

My specs:

iMac (Retina 5K, 27-inch, Late 2015)

3.2 GHz Intel Core i5

8 GB 1867 MHz DDR3

AMD Radeon R9 M390 2048 MB

iMac (Retina 5K, 27-inch, Late 2015), OS X El Capitan (10.11.1)

Posted on Oct 22, 2015 8:05 PM

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Answer 1

Linc Davis

Level 10

209,739 points

Oct 23, 2015 3:17 PM in response to ivangr

It's defective. This is a warranty issue.

If you bought the product in the U.S. directly from Apple (not from a reseller), you have 14 days from the date of delivery in which to exchange or return it for a refund. In other countries, the return policy may be different. If you bought from a reseller, its return policy applies.

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Answer 2

ivangr Author

Level 1

0 points

Oct 23, 2015 3:29 PM in response to Linc Davis

Apple seems to have come to that conclusion as well.

They've asked for this iMac to be returned to them for further testing. A new unit will be dispatched to me.

I've seen people talk on Twitter about running Heaven GPU tests and no one mentioned a crash. So I assume my iMac is indeed faulty. My worry was that this a early release hardware issue that affected other people too. In which case I would have asked for a straight refund.

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Answer 3

Jan 18, 2016 9:23 PM in response to ivangr

My 27" Late 2015 iMac Skylake 5k workstation running El Capitan is acting very similar. Constant app crashes, kernel panics and black screen exits to the log in screen. I work mostly in After Effects CC2014. QuickTime 7 and QT32 Server seem to be an issue. I have read about an Intel Skylake bug. We have reinstalled the OS X and it seems like more than a software issue. Sometimes it just shuts down and restarts with nothing running or rendering. Do you have any other info or advice?

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Answer 4

dialabrain

Level 10

136,127 points

Jan 19, 2016 3:45 AM in response to ivangr

FWIW, I have no problems running Heaven.

iMac (Retina 5K, 27-inch, Late 2015)

4 GHz Intel Core i7

32 GB 1867 MHz DDR3

AMD Radeon R9 M395X 4096 MB

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Answer 5

May 24, 2016 4:19 AM in response to uncle buckin'

Are you using third party ram (Crucial RAM) as well? I work mainly in after effects and I've had 2 crashes in the space of 2 days from getting my iMac new. Not sure if it was from intensive AE use. Do you get issues with external monitors too?

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Answer 6

Phoxx

Level 1

4 points

Oct 30, 2016 3:18 PM in response to ivangr

I have the same issue, my iMac will just crash then reboot, sometimes the fans will speed up to full speed and the screen will go black then it will reboot, I have an appointment on Wednesday with the so called Apple Genius Bar, I want them to replace it as it clearly isn't working as it should.

Before I had this one I had the mid 2011 21.5" iMac and I had no problems with that at all, it ran as smooth as silk I am now regretting selling it and getting this rubbish!.

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Answer 7

menchyk

Level 1

23 points

Nov 4, 2016 10:39 AM in response to ivangr

Ii have been dealing with this for 6 months. I am getting my 3rd replacement because they can't figure out what the deal is. I've had hardware replaced, removed software, upgraded and downgraded RAM using aftermarket as well as apple RAM. I am beyond frustrated.

My first machine was plagued with kernel panics. This machine is just unstable in regard to everything.... UGH!!!

Check it out, this is just the past 30 days

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