GeForce 8400 GS 512MB vs Radeon HD 6450 (OEM) 1GB

Intro

Compare those specifications to the Radeon HD 6450 (OEM) 1GB, which features a clock speed of 750 MHz and a GDDR5 memory frequency of 900 MHz. It also features a 64-bit memory bus, and uses a 40 nm design. It features 160 SPUs, 8 TAUs, and 4 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
GeForce 8400 GS 512MB		40 Watts
	Difference: 9 Watts (29%)

Memory Bandwidth

Theoretically, the Radeon HD 6450 (OEM) 1GB should perform a lot faster than the GeForce 8400 GS 512MB overall. (explain)

Radeon HD 6450 (OEM) 1GB		28800 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 22400 (350%)

Texel Rate

The Radeon HD 6450 (OEM) 1GB should be a small bit (approximately 15%) more effective at texture filtering than the GeForce 8400 GS 512MB. (explain)

Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 800 (15%)

Pixel Rate

The Radeon HD 6450 (OEM) 1GB should be a small bit (approximately 15%) faster with regards to anti-aliasing than the GeForce 8400 GS 512MB, and will be capable of handling higher resolutions more effectively. (explain)

Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 400 (15%)

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 data (counted in megabytes per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics 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 that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.