Radeon HD 6750 1GB vs Radeon R7 250X 2GB

Intro

Compare those specifications to the Radeon R7 250X 2GB, which features GPU clock speed of 1000 MHz, and 2048 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
Radeon R7 250X 2GB		95 Watts
	Difference: 9 Watts (10%)

Memory Bandwidth

As far as performance goes, the Radeon R7 250X 2GB should theoretically be just a bit better than the Radeon HD 6750 1GB in general. (explain)

Radeon R7 250X 2GB		72000 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 8000 (13%)

Texel Rate

The Radeon R7 250X 2GB should be quite a bit (approximately 53%) better at texture filtering than the Radeon HD 6750 1GB. (explain)

Radeon R7 250X 2GB		40000 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 13900 (53%)

Pixel Rate

The Radeon R7 250X 2GB is much (approximately 38%) faster with regards to FSAA than the Radeon HD 6750 1GB, and also able to handle higher resolutions without slowing down too much. (explain)

Radeon R7 250X 2GB		16000 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 4400 (38%)

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 information (counted in megabytes per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.