Radeon HD 4670 512MB vs Radeon R5 M230

Intro

Compare those specifications 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 bus, and uses a 28 nm design. It is made up of 320 SPUs, 20 TAUs, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 4670 512MB should perform quite a bit faster than the Radeon R5 M230 overall. (explain)

Radeon HD 4670 512MB		32000 MB/sec
Radeon R5 M230		16000 MB/sec
	Difference: 16000 (100%)

Texel Rate

The Radeon HD 4670 512MB will be quite a bit (more or less 54%) more effective at anisotropic filtering than the Radeon R5 M230. (explain)

Radeon HD 4670 512MB		24000 Mtexels/sec
Radeon R5 M230		15600 Mtexels/sec
	Difference: 8400 (54%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 4670 512MB is a better choice, and very much so. (explain)

Radeon HD 4670 512MB		6000 Mpixels/sec
Radeon R5 M230		3120 Mpixels/sec
	Difference: 2880 (92%)

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 (measured in megabytes per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.