Radeon HD 4730 vs Radeon HD 6750

Intro

Compare all that to the Radeon HD 6750, which has GPU core speed of 725 MHz, and 512 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also features 720 Stream Processors, 36 TAUs, and 16 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
Radeon HD 4730		140 Watts
	Difference: 54 Watts (63%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6750 is 11% quicker than the Radeon HD 4730 overall, because of its higher data rate. (explain)

Radeon HD 6750		64000 MB/sec
Radeon HD 4730		57600 MB/sec
	Difference: 6400 (11%)

Texel Rate

The Radeon HD 6750 is a small bit (more or less 17%) faster with regards to anisotropic filtering than the Radeon HD 4730. (explain)

Radeon HD 6750		26100 Mtexels/sec
Radeon HD 4730		22400 Mtexels/sec
	Difference: 3700 (17%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6750 is superior to the Radeon HD 4730, and very much so. (explain)

Radeon HD 6750		11600 Mpixels/sec
Radeon HD 4730		5600 Mpixels/sec
	Difference: 6000 (107%)

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 information (counted in megabytes per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the video 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 could 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 Render Output Units by the the core 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 lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.