GeForce 9400 GT 256MB vs Radeon HD 6450 (OEM)

Intro

Compare those specifications to the Radeon HD 6450 (OEM), which makes use of a 40 nm design. AMD has set the core frequency at 625 MHz. The GDDR3 memory is set to run at a speed of 800 MHz on this particular model. It features 160 SPUs along with 8 TAUs and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
GeForce 9400 GT 256MB		50 Watts
	Difference: 19 Watts (61%)

Memory Bandwidth

Both cards have exactly the same bandwidth, so theoretically they should have the same performance. (explain)

Texel Rate

The Radeon HD 6450 (OEM) is a small bit (about 14%) better at anisotropic filtering than the GeForce 9400 GT 256MB. (explain)

Radeon HD 6450 (OEM)		5000 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 600 (14%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6450 (OEM) is superior to the GeForce 9400 GT 256MB, though only just barely. (explain)

Radeon HD 6450 (OEM)		2500 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 300 (14%)

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: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.