Radeon HD 3690/3830 vs Radeon HD 6750

Intro

Compare those specs to the Radeon HD 6750, which uses a 40 nm design. AMD has set the core speed at 725 MHz. The GDDR5 RAM is set to run at a frequency of 1000 MHz on this specific model. It features 720 SPUs as well as 36 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3690/3830		75 Watts
Radeon HD 6750		86 Watts
	Difference: 11 Watts (15%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6750 should perform a lot faster than the Radeon HD 3690/3830 overall. (explain)

Radeon HD 6750		64000 MB/sec
Radeon HD 3690/3830		26496 MB/sec
	Difference: 37504 (142%)

Texel Rate

The Radeon HD 6750 is quite a bit (approximately 144%) more effective at anisotropic filtering than the Radeon HD 3690/3830. (explain)

Radeon HD 6750		26100 Mtexels/sec
Radeon HD 3690/3830		10688 Mtexels/sec
	Difference: 15412 (144%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6750 is a better choice, though only just barely. (explain)

Radeon HD 6750		11600 Mpixels/sec
Radeon HD 3690/3830		10688 Mpixels/sec
	Difference: 912 (9%)

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 (measured in megabytes per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 applied per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). 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 reach the maximum fill rate.