GeForce 8300 GS (OEM) vs Radeon HD 4890 1GB

Intro

Compare all of that to the Radeon HD 4890 1GB, which features core speeds of 1000 MHz on the GPU, and 975 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8300 GS (OEM)		40 Watts
Radeon HD 4890 1GB		190 Watts
	Difference: 150 Watts (375%)

Memory Bandwidth

The Radeon HD 4890 1GB, in theory, should perform a lot faster than the GeForce 8300 GS (OEM) in general. (explain)

Radeon HD 4890 1GB		124800 MB/sec
GeForce 8300 GS (OEM)		6400 MB/sec
	Difference: 118400 (1850%)

Texel Rate

The Radeon HD 4890 1GB should be a lot (approximately 2122%) more effective at AF than the GeForce 8300 GS (OEM). (explain)

Radeon HD 4890 1GB		40000 Mtexels/sec
GeForce 8300 GS (OEM)		1800 Mtexels/sec
	Difference: 38200 (2122%)

Pixel Rate

The Radeon HD 4890 1GB should be much (approximately 1678%) faster with regards to FSAA than the GeForce 8300 GS (OEM), and also will be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 4890 1GB		16000 Mpixels/sec
GeForce 8300 GS (OEM)		900 Mpixels/sec
	Difference: 15100 (1678%)

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 data (counted in MB per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.