Radeon HD 4830 512MB vs Radeon R5 M330

Intro

Compare those specs to the Radeon R5 M330, which comes with a core clock frequency of 1030 MHz and a DDR3 memory frequency of 900 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 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 4830 512MB should theoretically be a lot better 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 (about 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

The Radeon HD 4830 512MB should be a little bit (more or less 12%) faster with regards to full screen anti-aliasing than the Radeon R5 M330, and also able to handle higher screen resolutions more effectively. (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 information (in units of megabytes per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 number of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.