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GeForce 840M vs Radeon HD 6950

Intro

The GeForce 840M features clock speeds of 1029 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 384 SPUs as well as 24 Texture Address Units and 8 Rasterization Operator Units.

Compare those specs to the Radeon HD 6950, which comes with a clock frequency of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 256-bit memory bus, and uses a 40 nm design. It is made up of 1408 SPUs, 88 Texture Address Units, and 32 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 6950 3240 points
GeForce 840M 1600 points
Difference: 1640 (103%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 840M 30 Watts
Radeon HD 6950 200 Watts
Difference: 170 Watts (567%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6950 should in theory be much superior to the GeForce 840M overall. (explain)

Radeon HD 6950 160000 MB/sec
GeForce 840M 16000 MB/sec
Difference: 144000 (900%)

Texel Rate

The Radeon HD 6950 is a lot (approximately 185%) better at texture filtering than the GeForce 840M. (explain)

Radeon HD 6950 70400 Mtexels/sec
GeForce 840M 24696 Mtexels/sec
Difference: 45704 (185%)

Pixel Rate

The Radeon HD 6950 will be quite a bit (more or less 211%) faster with regards to FSAA than the GeForce 840M, and should be capable of handling higher resolutions better. (explain)

Radeon HD 6950 25600 Mpixels/sec
GeForce 840M 8232 Mpixels/sec
Difference: 17368 (211%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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GeForce 840M

Amazon.com

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Radeon HD 6950

Amazon.com

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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce 840M Radeon HD 6950
Manufacturer nVidia AMD
Year March 12 2014 December 2010
Code Name GM108 Cayman Pro
Memory 2048 MB 1024 MB
Core Speed 1029 MHz 800 MHz
Memory Speed 2000 MHz 5000 MHz
Power (Max TDP) 30 watts 200 watts
Bandwidth 16000 MB/sec 160000 MB/sec
Texel Rate 24696 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 8232 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 384 1408
Texture Mapping Units 24 88
Render Output Units 8 32
Bus Type DDR3 GDDR5
Bus Width 64-bit 256-bit
Fab Process 28 nm 40 nm
Transistors (Unknown) million 2640 million
Bus PCIe 3.0 x16 PCIe x16
DirectX Version DirectX 12 DirectX 11
OpenGL Version OpenGL 4.5 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce 840M

Amazon.com

Check prices at:

Radeon HD 6950

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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