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GeForce 820M vs Radeon R5 M255

Intro

The GeForce 820M makes use of a 28 nm design. nVidia has clocked the core speed at 719 MHz. The DDR3 RAM works at a frequency of 1000 MHz on this specific card. It features 96 SPUs as well as 16 TAUs and 4 ROPs.

Compare all that to the Radeon R5 M255, which features clock speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 320 SPUs along with 20 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Both cards have exactly the same memory bandwidth, so in theory they should have identical performance. (explain)

Texel Rate

The Radeon R5 M255 is a lot (about 63%) more effective at texture filtering than the GeForce 820M. (explain)

Radeon R5 M255 18800 Mtexels/sec
GeForce 820M 11504 Mtexels/sec
Difference: 7296 (63%)

Pixel Rate

The Radeon R5 M255 is a lot (more or less 161%) faster with regards to FSAA than the GeForce 820M, and also should be capable of handling higher resolutions more effectively. (explain)

Radeon R5 M255 7520 Mpixels/sec
GeForce 820M 2876 Mpixels/sec
Difference: 4644 (161%)

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

Check prices at:

Radeon R5 M255

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.

Specifications

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Model GeForce 820M Radeon R5 M255
Manufacturer nVidia AMD
Year February 2014 June 2014
Code Name GF117 Jet Pro
Memory 2048 MB 2048 MB
Core Speed 719 MHz 940 MHz
Memory Speed 2000 MHz 2000 MHz
Power (Max TDP) 15 watts (Unknown) watts
Bandwidth 16000 MB/sec 16000 MB/sec
Texel Rate 11504 Mtexels/sec 18800 Mtexels/sec
Pixel Rate 2876 Mpixels/sec 7520 Mpixels/sec
Unified Shaders 96 320
Texture Mapping Units 16 20
Render Output Units 4 8
Bus Type DDR3 DDR3
Bus Width 64-bit 64-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 2.0 x16 PCIe 3.0 x8
DirectX Version DirectX 12 DirectX 11.2
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant 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

Hide Prices

GeForce 820M

Amazon.com

Check prices at:

Radeon R5 M255

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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