Radeon HD 6750 vs Radeon R7 250

Intro

Compare all of that to the Radeon R7 250, which comes with a GPU core clock speed of 1000 MHz, and 1024 MB of GDDR5 memory running at 1150 MHz through a 128-bit bus. It also is made up of 384 Stream Processors, 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 6750		86 Watts
	Difference: 21 Watts (32%)

Memory Bandwidth

Theoretically, the Radeon R7 250 should be a small bit faster than the Radeon HD 6750 overall. (explain)

Radeon R7 250		73600 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 9600 (15%)

Texel Rate

The Radeon HD 6750 will be a little bit (approximately 9%) more effective at AF than the Radeon R7 250. (explain)

Radeon HD 6750		26100 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 2100 (9%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6750 is a better choice, and very much so. (explain)

Radeon HD 6750		11600 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 3600 (45%)

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 data (in units of MB per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 can be processed per second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the graphics 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 maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. 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 quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.