Radeon HD 4830 512MB vs Radeon R7 M265

Intro

Compare that to the Radeon R7 M265, which comes with a clock frequency of 725 MHz and a DDR3 memory speed of 1000 MHz. It also features a 128-bit bus, and uses 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

In theory, the Radeon HD 4830 512MB is 80% faster than the Radeon R7 M265 overall, because of its greater data rate. (explain)

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

Texel Rate

The Radeon HD 4830 512MB should be a bit (approximately 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 superior to the Radeon R7 M265, 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: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 can be applied in one second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, 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 record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.