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GeForce 830M vs Radeon R5 M255

Intro

The GeForce 830M uses a 28 nm design. nVidia has set the core speed at 1029 MHz. The DDR3 memory runs at a frequency of 900 MHz on this model. It features 256 SPUs along with 16 Texture Address Units and 8 Rasterization Operator Units.

Compare that to the Radeon R5 M255, which features core speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 320 SPUs as well as 20 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R5 M255 should perform just a bit faster than the GeForce 830M in general. (explain)

Radeon R5 M255 16000 MB/sec
GeForce 830M 14400 MB/sec
Difference: 1600 (11%)

Texel Rate

The Radeon R5 M255 should be a small bit (about 14%) more effective at texture filtering than the GeForce 830M. (explain)

Radeon R5 M255 18800 Mtexels/sec
GeForce 830M 16464 Mtexels/sec
Difference: 2336 (14%)

Pixel Rate

The GeForce 830M should be a small bit (approximately 9%) more effective at AA than the Radeon R5 M255, and also should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce 830M 8232 Mpixels/sec
Radeon R5 M255 7520 Mpixels/sec
Difference: 712 (9%)

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 830M

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 830M Radeon R5 M255
Manufacturer nVidia AMD
Year March 12 2014 June 2014
Code Name GM108 Jet Pro
Memory 2048 MB 2048 MB
Core Speed 1029 MHz 940 MHz
Memory Speed 1800 MHz 2000 MHz
Power (Max TDP) 25 watts (Unknown) watts
Bandwidth 14400 MB/sec 16000 MB/sec
Texel Rate 16464 Mtexels/sec 18800 Mtexels/sec
Pixel Rate 8232 Mpixels/sec 7520 Mpixels/sec
Unified Shaders 256 320
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 x16 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 largest amount of information (counted in MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out 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 handling 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 the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 830M

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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