Radeon HD 6750 vs Radeon R9 280X

Intro

Compare those specs to the Radeon R9 280X, which has a core clock frequency of 850 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 384-bit bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

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

Radeon R9 280X		288000 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 224000 (350%)

Texel Rate

The Radeon R9 280X is a lot (more or less 317%) more effective at texture filtering than the Radeon HD 6750. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 82700 (317%)

Pixel Rate

The Radeon R9 280X should be a lot (about 134%) more effective at AA than the Radeon HD 6750, and also should be capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 15600 (134%)

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 largest amount of data (in units of MB per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the 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 processed in one second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, 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 amount of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. 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 also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.