Radeon HD 4890 2GB vs Radeon R5 M330

Intro

Compare all of that to the Radeon R5 M330, which uses a 28 nm design. AMD has clocked the core speed at 1030 MHz. The DDR3 memory runs at a speed of 900 MHz on this model. It features 320 SPUs along with 20 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4890 2GB should theoretically perform a lot faster than the Radeon R5 M330 in general. (explain)

Radeon HD 4890 2GB		124800 MB/sec
Radeon R5 M330		14400 MB/sec
	Difference: 110400 (767%)

Texel Rate

The Radeon HD 4890 2GB will be much (about 94%) better at texture filtering than the Radeon R5 M330. (explain)

Radeon HD 4890 2GB		40000 Mtexels/sec
Radeon R5 M330		20600 Mtexels/sec
	Difference: 19400 (94%)

Pixel Rate

The Radeon HD 4890 2GB should be a lot (more or less 94%) better at anti-aliasing than the Radeon R5 M330, and should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 4890 2GB		16000 Mpixels/sec
Radeon R5 M330		8240 Mpixels/sec
	Difference: 7760 (94%)

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: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

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