NVIDIA GeForce GTX 800M Mobility Chips Launching At CeBIT ’14 – GTX 880M, 870M, 860M and 850M To Power Notebooks

Hassan Mujtaba
Posted Mar 10, 2014
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NVIDIA is preparing to launch their next series of mobility chips codenamed the GeForce GTX 800M at CeBIT 2014. The NVIDIA GeForce GTX 800M Mobility chips will feature four new chips which include the GTX 880M, 870M, 860M and the 850M which will power the high-performance notebooks in 2014.GeForce GTX 800M GTX 880M GTX 870M GTX 860M GTX 850M

NVIDIA GeForce GTX 800M Mobility Chips Launching At CeBIT14

Over the last few months, we have seen several leaks regarding the GeForce GTX 880M, GeForce GTX 870M and the most interesting GeForce GTX 860M GPUs. Apparently, the GeForce GTX 800M mobility lineup features both NVIDIA Kepler and Maxwell architecture based parts. From what we have seen, the GeForce GTX 880M and the GeForce GTX 870M are Kepler rebrands of the GeForce GTX 780M and GTX 770M chips while the GeForce GTX 860M and GTX 850M will feature the first generation Maxwell core architecture which made a debut last month with the GeForce GTX 750 series graphics cards.

Our buddies over at Videocardz managed to get hand of some exclusive slides which detail the performance and power efficiency of these new chips. From the specifications, we can see that the GeForce GTX 880M would be the flagship chip of the mobility lineup but it’s just a rebrand of the GTX 780M with some improved clock speeds. 

The GeForce GTX 880M is technically the same chip as the GeForce GTX 680M and GTX 780M with 1536 Cuda Cores, 128 TMUs and 32 ROPs but it has some key improvements. The VRAM has been expanded to 8 GB GDDR5 and the clock speeds have been bumped to 933 MHz base and 954 MHz boost although the memory is clocked at 5 GHz effective rate. The memory runs along a 256-bit interface pumping out 160 GB/s bandwidth though we don’t know how the higher VRAM would benefit users in terms of raw performance numbers.

NVIDIA GeForce GTX 880M Specifications:

  NVIDIA GeForce GTX 680MX NVIDIA GeForce GTX 780M NVIDIA GeForce GTX 880M
GPU Codename GK104 GK104 GK104
GPU Process 28nm 28nm 28nm
Cores 1536 CUDA 1536 CUDA 1536 CUDA
Core Clock 720 MHz 823 MHz 933 MHz
Boost Clock N/A N/A 954 MHz
VRAM 2 GB GDDR5 4 GB GDDR5 8 GB GDDR5
Memory Bus 256-bit 256-bit 256-bit
Memory Clock 5.0 GHz 5.0 GHz 5.0 GHz
Memory Bandwidth 160 GB/s 160 GB/s 160 GB/s
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Next up we have the GeForce GTX 870M which is another Kepler rebrand and a cut down version of the GeForce GTX 880M chip. The GeForce GTX 870M features the GK104 core with 1344 CUDA cores, 112 TMUs, 24 ROPs, a clock speed of 941 MHz core and 967 MHz boost. The chip features a massive 6 GB GDDR5 memory which runs across a 192-bit bus at speeds of 5 GHz effective (1250 MHz QDR) pumping out 120.0 GB/s bandwidth. We again see no use of the extra VRAM unless the user is playing 2K games.

NVIDIA GeForce GTX 870M Specifications:

  NVIDIA GeForce GTX 670MX NVIDIA GeForce GTX 770M NVIDIA GeForce GTX 870M
GPU Codename GK106 GK106 GK104
GPU Process 40nm 28nm 28nm
Cores 336 CUDA 960 CUDA 1344 CUDA
Core Clock 598 MHz 811 MHz 941 MHz
Boost Clock N/A N/A 967 MHz
VRAM 3 GB GDDR5 3 GB GDDR5 6 GB GDDR5
Memory Bus 192-bit 192-bit 192-bit
Memory Clock 3.0 GHz 4.0 GHz 5.0 GHz
Memory Bandwidth 72.0 GB/s 96 GB/s 120 GB/s

Maxwell Comes To Mobility As The GTX 860M and GTX 850M GPUs

The most interesting chips out of the bunch are the GeForce GTX 860M and the GeForce GTX 850M considering that these are the first mobile chips to feature the Maxwell core architecture. There are a few low end chips such as the GeForce GT 840M and GeForce GT 845M which are supposedly based on the GeForce Maxwell GM108 core but the 860M and 850M are confirmed to be based on Maxwell architecture.

For specifications, we are looking at the fully enabled GM107 core as featured on the GeForce GTX 750 Ti. The GeForce GTX 860M features 640 CUDA Cores, 40 Texture Mapping Units and 16 Raster operators. The 860M packs a 2 GB GDDR5 memory buffer which runs across a 128-bit wide bus at a frequency of 5 GHz effective. So we are looking at 80.2 GB/s bandwidth throughput. The core clocks are mentioned to be inaccurate considering the GPU-Z hasn’t yet updated with the correct information but considering the GTX 750 Ti, we might be looking at around 900 MHz – 1 GHz clock speeds and the overclocking potential of these chips would be great since the Maxwell core has already proved to be a great overclocker.

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Compared to the GeForce GTX 760M which featured the Kepler GK106 core with 768 CUDA Cores and a 2 GB GDDR5 memory that ran across a 128-bit bus, the GeForce GTX 860M is a slight downgrade if the core count is to be compared but it should be pointed that Maxwell cores are more powerful then Kepler cores and the GM107 is alot efficient requiring around 40-45 Watts of power compared to the 55-60W for the Kepler GK106 core. So we are looking at better performance from the GeForce GTX 860M along with a much power efficient design that requires lower power and runs cooler.

The GeForce GTX 850M is the mobile equivalent of the GeForce GTX 750 (Non-Ti) just as the GeForce GTX 860M is the mobile equivalent of the GeForce GTX 750 Ti. These cards show massive improvement to their predecessors in both power efficency and performance due to the Maxwell architecture with 860M showing a 40% and 850M showing a 60% improvement. The GeForce GTX 870M also shows a decent performance increase over its GTX 700M series predecessors since its based on GK104 core compared to GK106 core on the previous chips. Overall, we are looking at a mix of refreshes and some new additions which is good to see on the mobility front and these chips will end up with several upcoming notebooks featuring Haswell refresh and Broadwell processors arriving in 2014.GeForce GTX 800M Mobility Performance

NVIDIA Maxwell GeForce GTX 800M Mobility Specifications:

NVIDIA GeForce GTX 860M NVIDIA GeForce GTX 850M
GPU Maxwell GM107 Maxwell GM107
Process 28nm 28nm
Cores 640 CUDA 512 CUDA
Memory 2 GB GDDR5 2 GB GDDR5
Bus Interface 128-bit 128-bit
TDP 50W 40W
Package GB4B-128 GB4B-128

NVIDIA GeForce GTX 800M Mobility Family Slides (Courtesy of Videocardz):GeForce GTX 800M Mobility Gaming GeForce GTX 800M Mobility Notebooks GeForce GTX 800M Mobility GPUs GeForce GTX 800M Mobility Battery Boost GeForce GTX 800M Mobility Battery Boost Performance

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