Radeon HD 6950 2GB vs Radeon R7 250X

Intro

Compare all that to the Radeon R7 250X, which features a core clock speed of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X		95 Watts
Radeon HD 6950 2GB		200 Watts
	Difference: 105 Watts (111%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6950 2GB should theoretically be a lot superior to the Radeon R7 250X overall. (explain)

Radeon HD 6950 2GB		160000 MB/sec
Radeon R7 250X		72000 MB/sec
	Difference: 88000 (122%)

Texel Rate

The Radeon HD 6950 2GB will be quite a bit (about 76%) faster with regards to anisotropic filtering than the Radeon R7 250X. (explain)

Radeon HD 6950 2GB		70400 Mtexels/sec
Radeon R7 250X		40000 Mtexels/sec
	Difference: 30400 (76%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6950 2GB is a better choice, by a large margin. (explain)

Radeon HD 6950 2GB		25600 Mpixels/sec
Radeon R7 250X		16000 Mpixels/sec
	Difference: 9600 (60%)

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 (in units of megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.