Radeon HD 6750 1GB vs Radeon R7 250

Intro

Compare all that to the Radeon R7 250, which comes with core clock speeds of 1000 MHz on the GPU, and 1150 MHz on the 1024 MB of GDDR5 RAM. 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 6750 1GB		86 Watts
	Difference: 21 Watts (32%)

Memory Bandwidth

Theoretically, the Radeon R7 250 should be just a bit faster than the Radeon HD 6750 1GB overall. (explain)

Radeon R7 250		73600 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 9600 (15%)

Texel Rate

The Radeon HD 6750 1GB will be a bit (about 9%) faster with regards to AF than the Radeon R7 250. (explain)

Radeon HD 6750 1GB		26100 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 2100 (9%)

Pixel Rate

The Radeon HD 6750 1GB will be much (approximately 45%) faster with regards to FSAA than the Radeon R7 250, and able to handle higher resolutions while still performing well. (explain)

Radeon HD 6750 1GB		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: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the video 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 most pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.