Radeon HD 6750 vs Radeon R9 380 4G

Intro

Compare those specifications to the Radeon R9 380 4G, which comes with a clock frequency of 970 MHz and a GDDR5 memory frequency of 1425 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It is comprised of 1792 SPUs, 112 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
Radeon R9 380 4G		190 Watts
	Difference: 104 Watts (121%)

Memory Bandwidth

The Radeon R9 380 4G should in theory perform quite a bit faster than the Radeon HD 6750 overall. (explain)

Radeon R9 380 4G		182400 MB/sec
Radeon HD 6750		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. (explain)

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

Pixel Rate

The Radeon R9 380 4G is quite a bit (more or less 168%) faster with regards to FSAA than the Radeon HD 6750, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
Radeon HD 6750		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: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units of the card by the core 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 processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.