Definitely not, they share some next gen api principles but metal is lacking of many dx12 features for now...
Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
AMD M395X in new Retina iMac
- Thread starter MandiMac
- Start date
- Sort by reaction score
Definitely not, they share some next gen api principles but metal is lacking of many dx12 features for now...
Sure, sure. But newer games will inevitably embrace Mantle and the likes, and Metal/DX12 don't differentiate too much from each other as far as I know...we'll see
Still, both APIs are out now and they'll be fully embraced in the coming months and years. I'm bullish on that tech, I think users are gonna see the benefits real soon.
They some times get it right
Apple put the GTX680mx in the late 2012 model - great card for the machine...
iMac is rumoured to use the high end 1080M gpu from nvidia into the next 27" iMac
http://www.quora.com/next--Apples-new-iMac-late-2015-use-nvidia1080m-GPU-instead-of-Amd
http://www.quora.com/next--Apples-new-iMac-late-2015-use-nvidia1080m-GPU-instead-of-Amd
Got another source for that rumor? That link appears to be dead. If the iMac used the rumored mobile version of the Nvidia GTX 980 Ti, this would be a significant step up from the AMD m295x.
Well... I'll counter your unsubstantiated rumour with another unsubstantiated rumour. Unlikely considering these GPUs are not expected to arrive until 2017.
Source:- http://www.game-debate.com/hardware/?gid=1701&graphics=GeForce GTX 1080
m295X which is used in latest reina imac is rated at 250W. So R9 Nano looks like best choice for imac
Does the AMD R9 Nano even fit into the iMac?
If so, it sounds pretty impressive:
http://www.anandtech.com/show/9564/amd-announces-radeon-r9-nano-shipping-september-10th
If so, it sounds pretty impressive:
http://www.anandtech.com/show/9564/amd-announces-radeon-r9-nano-shipping-september-10th
Last edited:
Not true. Specifications list the M295X at 125 W. Its possible it can use slightly more power than this, but certainly not up to 250 W. That is in full size desktop GPU territory.
While Apple wouldn't use an off the shelf Nano with a traditional PCIe slot, it is certainly possible that the Fiji GPU that the Nano is based on could appear in the iMac. They would need to cut the power consumption down from 175 W to ~125 W though.
Based on the core count and clock speed of the m290X, there is no way that is correct. The correct listing on that site puts it at 100 W.
Well, it's wrong. Total power draw on the 5k iMac with M295X is 288W.
https://support.apple.com/en-gb/HT201918
Still think it's unlikely. Then again, it would be the best AIO hands down, but I guess such a move inevitably raises the price :/
Pathetic GPU choices are the only thing that keeps stopping me from ever getting iMacs.
Would love to see a return to NVIDIA and closer to "new models" or even the Fury Nano.
Would love to see a return to NVIDIA and closer to "new models" or even the Fury Nano.
That is what Apple are referring to as maximum load. Yes we all know that technically it's misleading but you must have heard of people referring to an entire desktop unit as the 'CPU'.
Anyway if you want more detail:-
Power consumption for this cutting-edge display and the computer that drives it was surprisingly low. The peak figure with screen at maximum brightness and CPU and GPU both under benchmark stress was 215 W.
Source:- http://www.macworld.co.uk/review/mac-desktops/retina-imac-in-depth-review-lab-test-3581076/
But I'm not doing any more of your homework for you, I have made it clear with references that the database you linked is clearly incorrect. If you still aren't convinced then look for yourself, there are lots of other data points.
Last edited:
It is possible that the numbers in the apple support article do not include a stressed GPU. For example, the Mac Pro results are clearly not using the GPU, as the processor is rated for ~140 W and the total system power is less than < 250 W. Anandtech finds that the Mac Pro hits ~450 W at max load.
Taking a guess at the power consumption of the iMac 5k looks like:
100-150 W for display (taken from the Dell 5k display)
90 W for CPU (intel 4790k)
25-50 W for SSD/HDD/motherboard (I made this up)
This puts us at 215-290 W without the GPU. Almost at the 288 W number in the Apple support article. So it is possible that no GPU is included in these tests. However, the difference between the core i5 iMac and the core i7 is 90 W, more than could be explained by just an upgraded CPU at full load. However, part of it could be a more heat being generated by the idling M295X compared to the M290.
Also, I had a lot of trouble finding more data points measuring the power consumption. In fact, probably the best guess for determining the power consumption of the M295X would be extrapolating from the AMD r9 285/380 (they are both based on Tonga). However this would be challenging due to the differences in core count and clock speed.