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GeForce 830M vs Radeon R5 M255

Intro

The GeForce 830M makes use of a 28 nm design. nVidia has clocked the core speed at 1029 MHz. The DDR3 RAM is set to run at a frequency of 900 MHz on this particular card. It features 256 SPUs along with 16 TAUs and 8 ROPs.

Compare those specs to the Radeon R5 M255, which makes use of a 28 nm design. AMD has clocked the core speed at 940 MHz. The DDR3 RAM works at a frequency of 1000 MHz on this specific model. It features 320 SPUs along with 20 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R5 M255 should be a small 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 (approximately 14%) better at AF than the GeForce 830M. (explain)

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

Pixel Rate

The GeForce 830M will be just a bit (about 9%) better at AA than the Radeon R5 M255, and also will be capable of handling higher resolutions without losing too much performance. (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: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the card's bus 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 faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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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.

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