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Radeon R5 M255 vs Radeon R5 M330

Intro

The Radeon R5 M255 uses a 28 nm design. AMD has set the core frequency at 940 MHz. The DDR3 RAM works at a speed of 1000 MHz on this particular card. It features 320 SPUs along with 20 Texture Address Units and 8 Rasterization Operator Units.

Compare all that to the Radeon R5 M330, which has core speeds of 1030 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 memory. It features 320 SPUs as well as 20 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R5 M255 should theoretically perform just a bit faster than the Radeon R5 M330 in general. (explain)

Radeon R5 M255 16000 MB/sec
Radeon R5 M330 14400 MB/sec
Difference: 1600 (11%)

Texel Rate

The Radeon R5 M330 will be a small bit (approximately 10%) faster with regards to anisotropic filtering than the Radeon R5 M255. (explain)

Radeon R5 M330 20600 Mtexels/sec
Radeon R5 M255 18800 Mtexels/sec
Difference: 1800 (10%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R5 M330 is the winner, not by a very large margin though. (explain)

Radeon R5 M330 8240 Mpixels/sec
Radeon R5 M255 7520 Mpixels/sec
Difference: 720 (10%)

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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Radeon R5 M255

Amazon.com

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Radeon R5 M330

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 Radeon R5 M255 Radeon R5 M330
Manufacturer AMD AMD
Year June 2014 2015
Code Name Jet Pro Oland
Memory 2048 MB 2048 MB
Core Speed 940 MHz 1030 MHz
Memory Speed 2000 MHz 1800 MHz
Power (Max TDP) (Unknown) watts (Unknown) watts
Bandwidth 16000 MB/sec 14400 MB/sec
Texel Rate 18800 Mtexels/sec 20600 Mtexels/sec
Pixel Rate 7520 Mpixels/sec 8240 Mpixels/sec
Unified Shaders 320 320
Texture Mapping Units 20 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 x16
DirectX Version DirectX 11.2 DirectX 12
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, the result should 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 AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon R5 M255

Amazon.com

Check prices at:

Radeon R5 M330

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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