Radeon HD 6950 2GB vs Radeon R7 250

Intro

Compare all of that to the Radeon R7 250, which comes with a core clock speed of 1000 MHz and a GDDR5 memory speed of 1150 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It is comprised of 384 SPUs, 24 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250		65 Watts
Radeon HD 6950 2GB		200 Watts
	Difference: 135 Watts (208%)

Memory Bandwidth

The Radeon HD 6950 2GB should in theory be quite a bit faster than the Radeon R7 250 overall. (explain)

Radeon HD 6950 2GB		160000 MB/sec
Radeon R7 250		73600 MB/sec
	Difference: 86400 (117%)

Texel Rate

The Radeon HD 6950 2GB is much (about 193%) faster with regards to anisotropic filtering than the Radeon R7 250. (explain)

Radeon HD 6950 2GB		70400 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 46400 (193%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6950 2GB is superior to the Radeon R7 250, by a large margin. (explain)

Radeon HD 6950 2GB		25600 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 17600 (220%)

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 data (in units of megabytes per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in one 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 called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.