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Radeon HD 4550 256MB vs Radeon R5 M255

Intro

The Radeon HD 4550 256MB features clock speeds of 600 MHz on the GPU, and 800 MHz on the 256 MB of DDR3 RAM. It features 80(16x5) SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

Compare that to the Radeon R5 M255, which comes with a core clock speed of 940 MHz and a DDR3 memory speed of 1000 MHz. It also uses a 64-bit memory bus, and makes use of a 28 nm design. It is comprised of 320 SPUs, 20 Texture Address Units, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R5 M255 should in theory be quite a bit better than the Radeon HD 4550 256MB in general. (explain)

Radeon R5 M255 16000 MB/sec
Radeon HD 4550 256MB 12800 MB/sec
Difference: 3200 (25%)

Texel Rate

The Radeon R5 M255 will be much (approximately 292%) more effective at anisotropic filtering than the Radeon HD 4550 256MB. (explain)

Radeon R5 M255 18800 Mtexels/sec
Radeon HD 4550 256MB 4800 Mtexels/sec
Difference: 14000 (292%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R5 M255 is superior to the Radeon HD 4550 256MB, by far. (explain)

Radeon R5 M255 7520 Mpixels/sec
Radeon HD 4550 256MB 2400 Mpixels/sec
Difference: 5120 (213%)

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 HD 4550 256MB

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 Radeon HD 4550 256MB Radeon R5 M255
Manufacturer AMD AMD
Year Sep 30, 2008 June 2014
Code Name RV710 Jet Pro
Memory 256 MB 2048 MB
Core Speed 600 MHz 940 MHz
Memory Speed 1600 MHz 2000 MHz
Power (Max TDP) 25 watts (Unknown) watts
Bandwidth 12800 MB/sec 16000 MB/sec
Texel Rate 4800 Mtexels/sec 18800 Mtexels/sec
Pixel Rate 2400 Mpixels/sec 7520 Mpixels/sec
Unified Shaders 80(16x5) 320
Texture Mapping Units 8 20
Render Output Units 4 8
Bus Type DDR3 DDR3
Bus Width 64-bit 64-bit
Fab Process 55 nm 28 nm
Transistors 242 million (Unknown) million
Bus PCIe 2.0 x16 PCIe 3.0 x8
DirectX Version DirectX 10.1 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 processed per second. This figure is worked out by multiplying the total amount of 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka 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 of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Radeon HD 4550 256MB

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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