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

Intro

Compare those specs to the Radeon R9 290, which features a GPU core clock speed of 800 MHz, and 4096 MB of GDDR5 memory running at 1250 MHz through a 512-bit bus. It also features 2560 SPUs, 160 Texture Address Units, and 64 ROPs.

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% quicker than the Radeon HD 6450 (OEM) 1GB in general, because of its higher 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 much (about 2033%) faster with regards to AF 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 is a lot (approximately 1607%) faster with regards to anti-aliasing than the Radeon HD 6450 (OEM) 1GB, and should be able to handle higher screen resolutions without slowing down too much. (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 largest amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of texture units of the card 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 a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.