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

Intro

Compare all of that to the Radeon R9 290, which makes use of a 28 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 RAM runs at a speed of 1250 MHz on this particular model. It features 2560 SPUs along with 160 TAUs 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

Theoretically speaking, the Radeon R9 290 should perform quite a bit faster than the Radeon HD 6450 (OEM) 1GB in general. (explain)

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

Texel Rate

The Radeon R9 290 is quite a bit (about 2033%) better at 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 should be quite a bit (about 1607%) better at FSAA than the Radeon HD 6450 (OEM) 1GB, and also able to handle higher screen resolutions better. (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 max amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.