GeForce 9400 GT 256MB vs Radeon HD 6450 (OEM) 1GB

Intro

Compare all that to the Radeon HD 6450 (OEM) 1GB, which makes use of a 40 nm design. AMD has set the core frequency at 750 MHz. The GDDR5 memory works at a frequency of 900 MHz on this particular model. It features 160 SPUs as well as 8 TAUs and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB		31 Watts
GeForce 9400 GT 256MB		50 Watts
	Difference: 19 Watts (61%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6450 (OEM) 1GB should theoretically be quite a bit better than the GeForce 9400 GT 256MB overall. (explain)

Radeon HD 6450 (OEM) 1GB		28800 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 16000 (125%)

Texel Rate

The Radeon HD 6450 (OEM) 1GB will be much (about 36%) better at AF than the GeForce 9400 GT 256MB. (explain)

Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 1600 (36%)

Pixel Rate

The Radeon HD 6450 (OEM) 1GB will be a lot (about 36%) faster with regards to FSAA than the GeForce 9400 GT 256MB, and also able to handle higher resolutions while still performing well. (explain)

Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 800 (36%)

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 max amount of information (in units of megabytes per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 can be processed in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video 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 graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.