Radeon HD 4850 1GB vs Radeon R7 M265

Intro

Compare those specs to the Radeon R7 M265, which uses a 28 nm design. AMD has set the core frequency at 725 MHz. The DDR3 RAM runs at a speed of 1000 MHz on this model. It features 384 SPUs along with 24 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4850 1GB should in theory perform quite a bit faster than the Radeon R7 M265 overall. (explain)

Radeon HD 4850 1GB		63552 MB/sec
Radeon R7 M265		32000 MB/sec
	Difference: 31552 (99%)

Texel Rate

The Radeon HD 4850 1GB will be a lot (more or less 44%) faster with regards to texture filtering than the Radeon R7 M265. (explain)

Radeon HD 4850 1GB		25000 Mtexels/sec
Radeon R7 M265		17400 Mtexels/sec
	Difference: 7600 (44%)

Pixel Rate

The Radeon HD 4850 1GB is much (about 72%) better at FSAA than the Radeon R7 M265, and also should be capable of handling higher resolutions more effectively. (explain)

Radeon HD 4850 1GB		10000 Mpixels/sec
Radeon R7 M265		5800 Mpixels/sec
	Difference: 4200 (72%)

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 maximum amount of data (in units of MB per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video 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 the video card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.