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Author Topic: CeBIT14: NVIDIA GeForce GTX 800M Mobility Chips Launching  (Read 1150 times)

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CeBIT14: NVIDIA GeForce GTX 800M Mobility Chips Launching
« on: March 11, 2014, 03:01:24 AM »
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.

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 itís 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 donít know how the higher VRAM would benefit users in terms of raw performance numbers.



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.



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 hasnít yet updated with the correct information but considering the GTX 750 Ti, we might be looking at around 900 MHz Ė 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.

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.





NVIDIA GeForce GTX 800M Mobility Family Slides (Courtesy of Videocardz):











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