GeForce GT 450 (OEM) vs Radeon HD 3850 256MB

Intro

Compare those specs to the Radeon HD 3850 256MB, which comes with core clock speeds of 668 MHz on the GPU, and 828 MHz on the 256 MB of GDDR3 memory. It features 320(64x5) SPUs along with 16 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3850 256MB		75 Watts
GeForce GT 450 (OEM)		106 Watts
	Difference: 31 Watts (41%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 450 (OEM) is 81% quicker than the Radeon HD 3850 256MB in general, due to its higher bandwidth. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
Radeon HD 3850 256MB		52992 MB/sec
	Difference: 43008 (81%)

Texel Rate

The GeForce GT 450 (OEM) will be much (approximately 77%) faster with regards to texture filtering than the Radeon HD 3850 256MB. (explain)

GeForce GT 450 (OEM)		18960 Mtexels/sec
Radeon HD 3850 256MB		10688 Mtexels/sec
	Difference: 8272 (77%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GT 450 (OEM) is the winner, by far. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
Radeon HD 3850 256MB		10688 Mpixels/sec
	Difference: 8272 (77%)

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 data (in units of megabytes per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen 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 texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number 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 calculated by multiplying the amount of Render Output Units 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 output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.