GeForce 9800 GTX+ vs Radeon HD 4850 1GB

Intro

Compare all of that to the Radeon HD 4850 1GB, which features core clock speeds of 625 MHz on the GPU, and 993 MHz on the 1024 MB of GDDR4 RAM. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 1GB		110 Watts
GeForce 9800 GTX+		145 Watts
	Difference: 35 Watts (32%)

Memory Bandwidth

Theoretically, the GeForce 9800 GTX+ should be a little bit faster than the Radeon HD 4850 1GB overall. (explain)

GeForce 9800 GTX+		70400 MB/sec
Radeon HD 4850 1GB		63552 MB/sec
	Difference: 6848 (11%)

Texel Rate

The GeForce 9800 GTX+ is a lot (about 89%) faster with regards to anisotropic filtering than the Radeon HD 4850 1GB. (explain)

GeForce 9800 GTX+		47232 Mtexels/sec
Radeon HD 4850 1GB		25000 Mtexels/sec
	Difference: 22232 (89%)

Pixel Rate

The GeForce 9800 GTX+ will be just a bit (approximately 18%) faster with regards to full screen anti-aliasing than the Radeon HD 4850 1GB, and able to handle higher screen resolutions better. (explain)

GeForce 9800 GTX+		11808 Mpixels/sec
Radeon HD 4850 1GB		10000 Mpixels/sec
	Difference: 1808 (18%)

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 (measured in MB per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.