Radeon HD 6750 1GB vs Radeon R9 380 4G

Intro

Compare all of that to the Radeon R9 380 4G, which comes with a GPU core clock speed of 970 MHz, and 4096 MB of GDDR5 RAM running at 1425 MHz through a 256-bit bus. It also is comprised 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 380 4G		190 Watts
	Difference: 104 Watts (121%)

Memory Bandwidth

The Radeon R9 380 4G should theoretically be quite a bit faster than the Radeon HD 6750 1GB overall. (explain)

Radeon R9 380 4G		182400 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 118400 (185%)

Texel Rate

The Radeon R9 380 4G is much (approximately 316%) faster with regards to anisotropic filtering than the Radeon HD 6750 1GB. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 82540 (316%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 380 4G is the winner, by far. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 19440 (168%)

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 (measured in megabytes per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 per second. This is worked out by multiplying the total number of texture units of the card by the core clock 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 per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output 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 max fill rate.