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GeForce 820M vs Radeon HD 7950

Intro

The GeForce 820M has core speeds of 719 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 96 SPUs as well as 16 TAUs and 4 ROPs.

Compare those specifications to the Radeon HD 7950, which comes with a GPU core clock speed of 800 MHz, and 1536 MB of GDDR5 RAM set to run at 1250 MHz through a 384-bit bus. It also is comprised of 1792 Stream Processors, 112 TAUs, and 32 Raster Operation Units.

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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 7950 7731 points
GeForce 820M 850 points
Difference: 6881 (810%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M 15 Watts
Radeon HD 7950 200 Watts
Difference: 185 Watts (1233%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7950 is 1400% quicker than the GeForce 820M in general, because of its greater bandwidth. (explain)

Radeon HD 7950 240000 MB/sec
GeForce 820M 16000 MB/sec
Difference: 224000 (1400%)

Texel Rate

The Radeon HD 7950 is a lot (more or less 679%) faster with regards to anisotropic filtering than the GeForce 820M. (explain)

Radeon HD 7950 89600 Mtexels/sec
GeForce 820M 11504 Mtexels/sec
Difference: 78096 (679%)

Pixel Rate

The Radeon HD 7950 is a lot (more or less 790%) faster with regards to FSAA than the GeForce 820M, and also should be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 7950 25600 Mpixels/sec
GeForce 820M 2876 Mpixels/sec
Difference: 22724 (790%)

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 820M

Amazon.com

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Radeon HD 7950

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 820M Radeon HD 7950
Manufacturer nVidia AMD
Year February 2014 January 2012
Code Name GF117 Tahiti Pro
Memory 2048 MB 1536 MB
Core Speed 719 MHz 800 MHz
Memory Speed 2000 MHz 5000 MHz
Power (Max TDP) 15 watts 200 watts
Bandwidth 16000 MB/sec 240000 MB/sec
Texel Rate 11504 Mtexels/sec 89600 Mtexels/sec
Pixel Rate 2876 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 96 1792
Texture Mapping Units 16 112
Render Output Units 4 32
Bus Type DDR3 GDDR5
Bus Width 64-bit 384-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million 4313 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 11.1
OpenGL Version OpenGL 4.5 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the max amount of data (counted in MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce 820M

Amazon.com

Check prices at:

Radeon HD 7950

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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