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GeForce 825M vs Radeon R5 M255

Intro

The GeForce 825M comes with a GPU core clock speed of 850 MHz, and the 2048 MB of DDR3 memory runs at 900 MHz through a 64-bit bus. It also features 384 SPUs, 16 TAUs, and 8 Raster Operation Units.

Compare those specifications to the Radeon R5 M255, which features core clock speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 320 SPUs as well as 20 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R5 M255 should be a bit faster than the GeForce 825M in general. (explain)

Radeon R5 M255 16000 MB/sec
GeForce 825M 14400 MB/sec
Difference: 1600 (11%)

Texel Rate

The Radeon R5 M255 should be a lot (approximately 38%) faster with regards to anisotropic filtering than the GeForce 825M. (explain)

Radeon R5 M255 18800 Mtexels/sec
GeForce 825M 13600 Mtexels/sec
Difference: 5200 (38%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R5 M255 is a better choice, but only just. (explain)

Radeon R5 M255 7520 Mpixels/sec
GeForce 825M 6800 Mpixels/sec
Difference: 720 (11%)

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 825M

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 825M Radeon R5 M255
Manufacturer nVidia AMD
Year January 27 2014 June 2014
Code Name GK208 Jet Pro
Memory 2048 MB 2048 MB
Core Speed 850 MHz 940 MHz
Memory Speed 1800 MHz 2000 MHz
Power (Max TDP) 33 watts (Unknown) watts
Bandwidth 14400 MB/sec 16000 MB/sec
Texel Rate 13600 Mtexels/sec 18800 Mtexels/sec
Pixel Rate 6800 Mpixels/sec 7520 Mpixels/sec
Unified Shaders 384 320
Texture Mapping Units 16 20
Render Output Units 8 8
Bus Type DDR3 DDR3
Bus Width 64-bit 64-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x8 PCIe 3.0 x8
DirectX Version DirectX 12 DirectX 11.2
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the 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 amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce 825M

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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