Radeon HD 4830 512MB vs Radeon R7 M265

Intro

Compare those specs to the Radeon R7 M265, which comes with a clock frequency of 725 MHz and a DDR3 memory speed of 1000 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It features 384 SPUs, 24 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 4830 512MB should theoretically be quite a bit better than the Radeon R7 M265 overall. (explain)

Radeon HD 4830 512MB		57600 MB/sec
Radeon R7 M265		32000 MB/sec
	Difference: 25600 (80%)

Texel Rate

The Radeon HD 4830 512MB is a little bit (about 6%) faster with regards to anisotropic filtering than the Radeon R7 M265. (explain)

Radeon HD 4830 512MB		18400 Mtexels/sec
Radeon R7 M265		17400 Mtexels/sec
	Difference: 1000 (6%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 4830 512MB is a better choice, by a large margin. (explain)

Radeon HD 4830 512MB		9200 Mpixels/sec
Radeon R7 M265		5800 Mpixels/sec
	Difference: 3400 (59%)

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 information (counted in MB per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it must 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 AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.