Radeon HD 4830 512MB vs Radeon R5 M330

Intro

Compare those specs to the Radeon R5 M330, which features clock speeds of 1030 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 memory. 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 4830 512MB, in theory, should be much faster than the Radeon R5 M330 overall. (explain)

Radeon HD 4830 512MB		57600 MB/sec
Radeon R5 M330		14400 MB/sec
	Difference: 43200 (300%)

Texel Rate

The Radeon R5 M330 is a small bit (approximately 12%) faster with regards to texture filtering than the Radeon HD 4830 512MB. (explain)

Radeon R5 M330		20600 Mtexels/sec
Radeon HD 4830 512MB		18400 Mtexels/sec
	Difference: 2200 (12%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 4830 512MB is the winner, but it probably won't make a huge difference. (explain)

Radeon HD 4830 512MB		9200 Mpixels/sec
Radeon R5 M330		8240 Mpixels/sec
	Difference: 960 (12%)

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 max amount of data (in units of megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

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