Radeon HD 6450 (OEM) 1GB vs Radeon R9 290

Intro

Compare those specs to the Radeon R9 290, which features a clock speed of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 512-bit bus, and makes use of a 28 nm design. It features 2560 SPUs, 160 TAUs, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB		31 Watts
Radeon R9 290		300 Watts
	Difference: 269 Watts (868%)

Memory Bandwidth

In theory, the Radeon R9 290 should be 1011% faster than the Radeon HD 6450 (OEM) 1GB overall, because of its greater bandwidth. (explain)

Radeon R9 290		320000 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 291200 (1011%)

Texel Rate

The Radeon R9 290 will be quite a bit (more or less 2033%) faster with regards to anisotropic filtering than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon R9 290		128000 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 122000 (2033%)

Pixel Rate

The Radeon R9 290 should be quite a bit (approximately 1607%) more effective at AA than the Radeon HD 6450 (OEM) 1GB, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 290		51200 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 48200 (1607%)

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 data (in units of megabytes per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total texture units of the card by the core 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 most pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also 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, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.