Radeon HD 7950 3GB vs Radeon R7 250

Intro

Compare all that to the Radeon R7 250, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 memory works at a frequency of 1150 MHz on this particular model. It features 384 SPUs as well as 24 TAUs 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 7950 3GB		200 Watts
	Difference: 135 Watts (208%)

Memory Bandwidth

In theory, the Radeon HD 7950 3GB will be 226% faster than the Radeon R7 250 overall, because of its greater data rate. (explain)

Radeon HD 7950 3GB		240000 MB/sec
Radeon R7 250		73600 MB/sec
	Difference: 166400 (226%)

Texel Rate

The Radeon HD 7950 3GB should be much (approximately 273%) faster with regards to texture filtering than the Radeon R7 250. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 65600 (273%)

Pixel Rate

The Radeon HD 7950 3GB should be a lot (more or less 220%) faster with regards to full screen anti-aliasing than the Radeon R7 250, and also will be capable of handling higher screen resolutions better. (explain)

Radeon HD 7950 3GB		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: Bandwidth is the maximum amount of data (counted in MB per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.