Radeon HD 6750 1GB vs Radeon R9 280

Intro

Compare those specifications to the Radeon R9 280, which comes with a core clock speed of 933 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 384-bit memory bus, and uses a 28 nm design. It is made up of 1792 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
Radeon R9 280		250 Watts
	Difference: 164 Watts (191%)

Memory Bandwidth

Theoretically, the Radeon R9 280 should perform much faster than the Radeon HD 6750 1GB overall. (explain)

Radeon R9 280		240000 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 176000 (275%)

Texel Rate

The Radeon R9 280 should be much (about 300%) better at AF than the Radeon HD 6750 1GB. (explain)

Radeon R9 280		104496 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 78396 (300%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 280 is the winner, by far. (explain)

Radeon R9 280		29856 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 18256 (157%)

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 data (in units of megabytes per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.