GeForce GT 450 (OEM) vs Radeon HD 5830

Intro

Compare that to the Radeon HD 5830, which comes with core clock speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 1120(224x5) SPUs as well as 56 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
Radeon HD 5830		175 Watts
	Difference: 69 Watts (65%)

Memory Bandwidth

As far as performance goes, the Radeon HD 5830 should in theory be quite a bit better than the GeForce GT 450 (OEM) overall. (explain)

Radeon HD 5830		128000 MB/sec
GeForce GT 450 (OEM)		96000 MB/sec
	Difference: 32000 (33%)

Texel Rate

The Radeon HD 5830 will be quite a bit (more or less 136%) more effective at anisotropic filtering than the GeForce GT 450 (OEM). (explain)

Radeon HD 5830		44800 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 25840 (136%)

Pixel Rate

The GeForce GT 450 (OEM) should be quite a bit (about 48%) faster with regards to full screen anti-aliasing than the Radeon HD 5830, and also will be capable of handling higher resolutions better. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
Radeon HD 5830		12800 Mpixels/sec
	Difference: 6160 (48%)

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 calculated by multiplying the interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 are processed in one second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, 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 that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.