Radeon HD 4830 512MB vs Radeon R7 M260

Intro

Compare that to the Radeon R7 M260, which has core clock speeds of 715 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 384 SPUs along with 24 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 4830 512MB should be a lot faster than the Radeon R7 M260 overall. (explain)

Radeon HD 4830 512MB		57600 MB/sec
Radeon R7 M260		16000 MB/sec
	Difference: 41600 (260%)

Texel Rate

The Radeon HD 4830 512MB should be just a bit (approximately 7%) more effective at AF than the Radeon R7 M260. (explain)

Radeon HD 4830 512MB		18400 Mtexels/sec
Radeon R7 M260		17160 Mtexels/sec
	Difference: 1240 (7%)

Pixel Rate

If running with a high screen resolution 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 M260		5720 Mpixels/sec
	Difference: 3480 (61%)

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 largest amount of information (counted in megabytes per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.