Radeon HD 4850 1GB vs Radeon R5 M230

Intro

Compare those specs to the Radeon R5 M230, which features a clock frequency of 780 MHz and a DDR3 memory frequency of 1000 MHz. It also features a 64-bit memory bus, and makes use of a 28 nm design. It 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

Performance-wise, the Radeon HD 4850 1GB should theoretically be a lot superior to the Radeon R5 M230 overall. (explain)

Radeon HD 4850 1GB		63552 MB/sec
Radeon R5 M230		16000 MB/sec
	Difference: 47552 (297%)

Texel Rate

The Radeon HD 4850 1GB will be much (approximately 60%) better at texture filtering than the Radeon R5 M230. (explain)

Radeon HD 4850 1GB		25000 Mtexels/sec
Radeon R5 M230		15600 Mtexels/sec
	Difference: 9400 (60%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 4850 1GB is a better choice, by a large margin. (explain)

Radeon HD 4850 1GB		10000 Mpixels/sec
Radeon R5 M230		3120 Mpixels/sec
	Difference: 6880 (221%)

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 max amount of data (in units of MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total amount of texture units of the card 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.