ARM Midgard Architecture

Yea..with the exception of the 830 which is a new part..820 and 860 seem like just a minor update over 720 and 760..seems more like a renaming. And in their marketing they avoided any comparison to T7xx. All the comparisons were to T6xx to make it look better I guess. The Video decoder and DSP seem to be bigger news than the GPUs.

 

ARM has stealthily released more information about the mali-T880. It used to have its own page now it shares the same page as the T860. The significant bump in performance they announced comes from an extra arithmetic pipeline, so 3 per core.

 

They had revealed that back in March.

 

I never read it before be it on ARM website or on your's. They claimed a big x1.8 performance against T760 configuration but few explanations were given.

 

It wasn't specified in the February announcement but AFAIK the T880 page went up soon after that and had the 3 ALU graphic already in it. Pretty certain on the that since they rehashed it again at TechDay in April.

The 1.8x performance figure was dubious and was referring to generation n-2 with also process node improvements. So basically not very honest figures.

 

I feel like a bug in the matrix, something that went not reported or underreported. I remember a discussion not that long ago on the matter of ARM FLOPS accountability and whereas they are clear about how they get their numbers they do not use "standard'" accountability when it comes to it. So pretty much we move from 34 FLOPS per core per cycle to? 51?

that was indeed a quite PRish figure.

 

We will have a few more details for T880 once it appears in benchmarks. That said so far for T860 vs. T760 and going with the frequencies here: http://www.anandtech.com/show/9308/mediatek-helio-p10

MT6752, MaliT760MP2@728MHz = 5.8 fps Manhattan 3.0 offscreen https://gfxbench.com/device.jsp?benchmark=gfxgen&os=Android&api=gl&cpu-arch=ARM&hwtype=GPU&hwname=ARM Mali-T760&did=24745186&D=iOCEAN M6752
MT6755, MaliT860MP2@700MHz = 7.2 fps Manhattan 3.0 offscreen https://gfxbench.com/device.jsp?ben...ediaTek MT6755 (Mali-T860, development board)

Normalized to 700MHz for both, the T860 config shows an increase of 29% compared to the T760 in that specific test. Since they had claimed for the 860 that it would have 120% 760 performance, it's well above that claim.

 

The memory controller boost might have something to do with that. Btw both your links are the same.

 

Inserted the correct link, thank you.

 

First Kirin950 Gfxbench results: https://gfxbench.com/device.jsp?ben...=ARM Mali-T880&did=27816486&D=Huawei NXT-AL10

Isn't the GPU in the 950 a quad T880 clocked at 900MHz? Unless the driver is somewhat immature or the results aren't at full frequency, the results don't sound very convincing.

 

There's a hotchips presentation on the T880 here:
http://www.hotchips.org/wp-content/...C27.25.531-Mali-T880-Bratt-ARM-2015_08_23.pdf