Radeon HD 4890 2GB vs Radeon R5 M230

Intro

Compare those specifications to the Radeon R5 M230, which features GPU core speed of 780 MHz, and 2048 MB of DDR3 RAM set to run at 1000 MHz through a 64-bit bus. It also is made up of 320 SPUs, 20 Texture Address Units, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4890 2GB should in theory perform a lot faster than the Radeon R5 M230 in general. (explain)

Radeon HD 4890 2GB		124800 MB/sec
Radeon R5 M230		16000 MB/sec
	Difference: 108800 (680%)

Texel Rate

The Radeon HD 4890 2GB is much (about 156%) better at AF than the Radeon R5 M230. (explain)

Radeon HD 4890 2GB		40000 Mtexels/sec
Radeon R5 M230		15600 Mtexels/sec
	Difference: 24400 (156%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 4890 2GB is superior to the Radeon R5 M230, and very much so. (explain)

Radeon HD 4890 2GB		16000 Mpixels/sec
Radeon R5 M230		3120 Mpixels/sec
	Difference: 12880 (413%)

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

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics 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 that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.