Radeon HD 4890 1GB vs Radeon R5 M230

Intro

Compare all of that to the Radeon R5 M230, which features a clock frequency of 780 MHz and a DDR3 memory speed of 1000 MHz. It also features a 64-bit memory bus, and uses a 28 nm design. It features 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 1GB should theoretically perform much faster than the Radeon R5 M230 in general. (explain)

Radeon HD 4890 1GB		124800 MB/sec
Radeon R5 M230		16000 MB/sec
	Difference: 108800 (680%)

Texel Rate

The Radeon HD 4890 1GB should be quite a bit (about 156%) faster with regards to texture filtering than the Radeon R5 M230. (explain)

Radeon HD 4890 1GB		40000 Mtexels/sec
Radeon R5 M230		15600 Mtexels/sec
	Difference: 24400 (156%)

Pixel Rate

The Radeon HD 4890 1GB should be a lot (about 413%) better at full screen anti-aliasing than the Radeon R5 M230, and able to handle higher resolutions while still performing well. (explain)

Radeon HD 4890 1GB		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 MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better 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 processed in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The higher 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 a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.