Radeon HD 3650 512MB vs Radeon HD 6450 (OEM)

Intro

Compare all of that to the Radeon HD 6450 (OEM), which features a clock frequency of 625 MHz and a GDDR3 memory speed of 800 MHz. It also uses a 64-bit bus, and makes use of a 40 nm design. It is made up of 160 SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
Radeon HD 3650 512MB		78 Watts
	Difference: 47 Watts (152%)

Memory Bandwidth

In theory, the Radeon HD 3650 512MB should be 100% faster than the Radeon HD 6450 (OEM) in general, due to its greater bandwidth. (explain)

Radeon HD 3650 512MB		25600 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 12800 (100%)

Texel Rate

The Radeon HD 3650 512MB should be a little bit (about 16%) more effective at AF than the Radeon HD 6450 (OEM). (explain)

Radeon HD 3650 512MB		5800 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 800 (16%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 3650 512MB is superior to the Radeon HD 6450 (OEM), though only just barely. (explain)

Radeon HD 3650 512MB		2900 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 400 (16%)

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 max amount of information (counted in megabytes per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has 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 AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of 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.