Radeon HD 5830 vs Radeon HD 6450 (OEM)

Intro

Compare that to the Radeon HD 6450 (OEM), which has core speeds of 625 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 RAM. It features 160 SPUs along with 8 TAUs and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
Radeon HD 5830		175 Watts
	Difference: 144 Watts (465%)

Memory Bandwidth

In theory, the Radeon HD 5830 should be 900% quicker than the Radeon HD 6450 (OEM) in general, because of its higher data rate. (explain)

Radeon HD 5830		128000 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 115200 (900%)

Texel Rate

The Radeon HD 5830 should be quite a bit (about 796%) better at anisotropic filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 39800 (796%)

Pixel Rate

The Radeon HD 5830 should be quite a bit (approximately 412%) faster with regards to AA than the Radeon HD 6450 (OEM), and also able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 5830		12800 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 10300 (412%)

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 MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 can be processed 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 better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.