Radeon HD 3650 vs Radeon HD 3690/3830

Intro

Compare all of that to the Radeon HD 3690/3830, which features GPU clock speed of 668 MHz, and 256 MB of GDDR3 RAM running at 828 MHz through a 128-bit bus. It also features 320(64x5) Stream Processors, 16 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3690/3830		75 Watts
Radeon HD 3650		78 Watts
	Difference: 3 Watts (4%)

Memory Bandwidth

Performance-wise, the Radeon HD 3690/3830 should in theory be a small bit better than the Radeon HD 3650 in general. (explain)

Radeon HD 3690/3830		26496 MB/sec
Radeon HD 3650		25600 MB/sec
	Difference: 896 (4%)

Texel Rate

The Radeon HD 3690/3830 will be much (approximately 84%) better at texture filtering than the Radeon HD 3650. (explain)

Radeon HD 3690/3830		10688 Mtexels/sec
Radeon HD 3650		5800 Mtexels/sec
	Difference: 4888 (84%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 3690/3830 is superior to the Radeon HD 3650, and very much so. (explain)

Radeon HD 3690/3830		10688 Mpixels/sec
Radeon HD 3650		2900 Mpixels/sec
	Difference: 7788 (269%)

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 information (measured in MB per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.