Radeon HD 6750 vs Radeon R9 285

Intro

Compare those specifications to the Radeon R9 285, which features GPU clock speed of 918 MHz, and 2048 MB of GDDR5 RAM set to run at 1375 MHz through a 256-bit bus. It also is comprised of 1792 Stream Processors, 112 TAUs, 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 285		190 Watts
	Difference: 104 Watts (121%)

Memory Bandwidth

As far as performance goes, the Radeon R9 285 should theoretically be quite a bit superior to the Radeon HD 6750 overall. (explain)

Radeon R9 285		176000 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 112000 (175%)

Texel Rate

The Radeon R9 285 will be a lot (about 294%) better at anisotropic filtering than the Radeon HD 6750. (explain)

Radeon R9 285		102816 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 76716 (294%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 285 is a better choice, by a large margin. (explain)

Radeon R9 285		29376 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 17776 (153%)

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 largest amount of data (in units of MB per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 number of texture map elements (texels) that are applied per second. This figure 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few 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.