Radeon HD 7970 vs Radeon R7 250X 2GB

Intro

Compare that to the Radeon R7 250X 2GB, which has core speeds of 1000 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB		95 Watts
Radeon HD 7970		250 Watts
	Difference: 155 Watts (163%)

Memory Bandwidth

In theory, the Radeon HD 7970 should be a lot faster than the Radeon R7 250X 2GB overall. (explain)

Radeon HD 7970		264000 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 192000 (267%)

Texel Rate

The Radeon HD 7970 is a lot (approximately 196%) better at AF than the Radeon R7 250X 2GB. (explain)

Radeon HD 7970		118400 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 78400 (196%)

Pixel Rate

The Radeon HD 7970 should be much (more or less 85%) better at anti-aliasing than the Radeon R7 250X 2GB, and will be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 7970		29600 Mpixels/sec
Radeon R7 250X 2GB		16000 Mpixels/sec
	Difference: 13600 (85%)

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 max amount of information (measured in MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the 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 most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.