NVIDIA GeForce 840M vs NVIDIA GeForce 845M
NVIDIA GeForce 840M
► remove from comparison
The NVIDIA GeForce 840M is a mid-range DirectX 12-compatible graphics card for laptops unveiled in March 2014. It is one of the first cards based on Nvidia's new Maxwell architecture (GM108 chip), but is still manufactured in 28 nm. The 840M offers 384 shader units clocked at 1029 MHz (+ Boost) as well as 2 GB of DDR3 memory (64 bit, 2000 MHz effective).
Architecture
Compared to Kepler, Maxwell has been optimized in several details to increase power efficiency. Smaller Streaming Multiprocessors (SMM) with only 128 ALUs (Kepler: 192) and an optimized scheduler should lead to better utilization of the shaders. Nvidia promises that a Maxwell SMM with 128 ALUs can offer 90 percent of the performance of a Kepler SMX with 192 ALUs. GM108 features 3 SMMs and thus 384 shader cores, 24 TMUs and 8 ROPs (64-bit interface).
Another optimization is the massively enlarged L2 cache. The larger size can process some of the memory traffic to allow for a relatively narrow memory interface without significantly reducing performance.
Similar to Fermi and Kepler, the GM107/GM108 support DirectX 12 with feature level 11_0 only.
Performance
According to our benchmarks, the GeForce 840M is about 30 percent faster than the old GT 740M and just slightly behind a GeForce GT 750M (DDR3 version). Many games of 2013/2014 can be played fluently in WXGA resolution (1366 x 768) and medium or high detail settings. However, very demanding games such as Crysis 3 or Battlefield 4 will require lower resolutions and/or details.
Features
GM108 integrates the sixth generation of the PureVideo HD video engine (VP6), offering a better decoding performance for H.264 and MPEG-2 videos. Of course, VP6 supports all features of previous generations (4K support, PIP, video encoding via NVENC API). Unfortunately, HDMI 2.0 is still not supported.
Power Consumption
The power consumption of the GeForce 840M should be about 30 Watts or lower. Therefore, the GPU is best suited for laptops 13 - 14 inches in size and above. The 800M series also supports Optimus to automatically switch between an integrated graphics card and the Nvidia GPU.
NVIDIA GeForce 845M
► remove from comparisonThe NVIDIA GeForce 845M is a mid-range, DirectX 12-compatible graphics card for laptops unveiled in spring 2014. It is one of the first cards based on Nvidia's new Maxwell architecture, but is still manufactured in 28 nm. In addition to a version based on GM107 (partially deactivated to 384 ALUs, 128-bit, DDR3 memory), there is also another version using the GM108 chip (384 Shader, 64-bit, GDDR5 memory). Both models offer approximately the same performance.
Architecture
Compared to Kepler, Maxwell has been optimized in several details to increase power efficiency. Smaller Streaming Multiprocessors (SMM) with only 128 ALUs (Kepler: 192) and an optimized scheduler should lead to better utilization of the shaders. Nvidia promises that a Maxwell SMM with 128 ALUs can offer 90 percent of the performance of a Kepler SMX with 192 ALUs.
Another optimization is the massively enlarged L2 cache (GM107: 2 MB). The larger size can process some of the memory traffic to allow for a relatively narrow memory interface without significantly reducing performance.
Similar to Fermi and Kepler, the GM107 and GM108 support DirectX 12 with feature level 11.0 only.
Performance
Thanks to the 128-bit memory interface (respectively the GDDR5 memory of the GM108 model), the GeForce 845M offers about 30 percent more performance than the GeForce 840M. However, a GeForce GTX 850M is still an additional 50 percent faster. Many games of 2013/2014 (Tomb Raider or BioShock Infinite, etc.) can be played fluently in 1366 x 768 and high detail settings. Very demanding games such as Crysis 3 or Battlefield 4 will require lower resolutions and/or details.
Features
GM107/108 integrate the sixth generation of the PureVideo HD video engine (VP6), offering a better decoding performance for H.264 and MPEG-2 videos. Of course, VP6 supports all features of previous generations (4K support, PIP, video encoding via NVENC API). Unfortunately, HDMI 2.0 is still not supported.
Power Consumption
The power consumption of the GeForce 845M should be in a range of about 30 - 35 Watts. Therefore, the card is best suited for 14-inch laptops or larger. The 800M series also supports Optimus to automatically switch between an integrated graphics card and the Nvidia GPU.
| NVIDIA GeForce 840M | NVIDIA GeForce 845M | |||||||||||||||||||||||||||||||
| GeForce 800M Series |
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| Codename | N15S-GT | |||||||||||||||||||||||||||||||
| Architecture | Maxwell | Maxwell | ||||||||||||||||||||||||||||||
| Pipelines | 384 - unified | 384 - unified | ||||||||||||||||||||||||||||||
| Core Speed | 1029 MHz | 1071 - 1150 (Boost) MHz | ||||||||||||||||||||||||||||||
| Memory Speed | 2000 MHz | 2000 - 5000 MHz | ||||||||||||||||||||||||||||||
| Memory Bus Width | 64 Bit | 64/128 Bit | ||||||||||||||||||||||||||||||
| Memory Type | DDR3 | DDR3, GDDR5 | ||||||||||||||||||||||||||||||
| Max. Amount of Memory | 4 GB | 2048 MB | ||||||||||||||||||||||||||||||
| Shared Memory | no | no | ||||||||||||||||||||||||||||||
| API | DirectX 12 (FL 11_0), Shader 5.0, OpenGL 4.5 | DirectX 12 (FL 11_0), Shader 5.0, OpenGL 4.4 | ||||||||||||||||||||||||||||||
| technology | 28 nm | 28 nm | ||||||||||||||||||||||||||||||
| Features | GPU Boost 2.0, Optimus, PhysX, CUDA, GeForce Experience, GameWorks | GPU Boost 2.0, Optimus, PhysX, CUDA, GeForce Experience | ||||||||||||||||||||||||||||||
| Notebook Size | medium sized | medium sized | ||||||||||||||||||||||||||||||
| Date of Announcement | 12.03.2014 | 12.03.2014 | ||||||||||||||||||||||||||||||
| Link to Manufacturer Page | www.nvidia.de |
Benchmarks
3DM Vant. Perf. total + NVIDIA GeForce 840M
specvp11 snx-01 + NVIDIA GeForce 840M
specvp12 sw-03 + NVIDIA GeForce 840M
Cinebench R15 OpenGL 64 Bit + NVIDIA GeForce 840M
GFXBench T-Rex HD Offscreen C24Z16 + NVIDIA GeForce 840M
Average Benchmarks NVIDIA GeForce 840M → 100% n=11
Average Benchmarks NVIDIA GeForce 845M → 117% n=11
- Average benchmark values for this graphics card* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation
Game Benchmarks
The following benchmarks stem from our benchmarks of review laptops. The performance depends on the used graphics memory, clock rate, processor, system settings, drivers, and operating systems. So the results don't have to be representative for all laptops with this GPU. For detailed information on the benchmark results, click on the fps number.
FIFA 16
2015
World of Warships
2015
Metal Gear Solid V
2015
Mad Max
2015
The Witcher 3
2015
Dirt Rally
2015
Battlefield Hardline
2015
Evolve
2015
The Crew
2014
Far Cry 4
2014
F1 2014
2014
The Evil Within
2014
Ryse: Son of Rome
2014
Alien: Isolation
2014
Fifa 15
2014
Sims 4
2014
Risen 3: Titan Lords
2014
GRID: Autosport
2014
Watch Dogs
2014
Titanfall
2014
Thief
2014
X-Plane 10.25
2013
Call of Duty: Ghosts
2013
Battlefield 4
2013
F1 2013
2013
Fifa 14
2013
Total War: Rome II
2013
Saints Row IV
2013
Dota 2
2013
Company of Heroes 2
2013
GRID 2
2013
Metro: Last Light
2013
BioShock Infinite
2013
SimCity
2013
Tomb Raider
2013
Crysis 3
2013
Dead Space 3
2013
Far Cry 3
2012
Assassin´s Creed III
2012
Hitman: Absolution
2012
Dishonored
2012
Borderlands 2
2012
Guild Wars 2
2012
Counter-Strike: GO
2012
Sleeping Dogs
2012
Max Payne 3
2012
Diablo III
2012
Risen 2: Dark Waters
2012
Mass Effect 3
2012
Anno 2070
2011
Battlefield 3
2011
Batman: Arkham City
2011
Total War: Shogun 2
2011
Civilization 5
2010
Mafia 2
2010
StarCraft 2
2010
Metro 2033
2010
World of Warcraft
2005Average Gaming NVIDIA GeForce 840M → 100%
Average Gaming 30-70 fps → 100%
Average Gaming NVIDIA GeForce 845M → 101%
Average Gaming 30-70 fps → 101%
For more games that might be playable and a list of all games and graphics cards visit our Gaming List
