GeForce 9800 GT 1GB vs Radeon HD 6770 1GB

Intro

Compare those specs to the Radeon HD 6770 1GB, which has a core clock speed of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also features a 128-bit memory bus, and makes use of a 40 nm design. It features 800 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 1GB		105 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 3 Watts (3%)

Memory Bandwidth

The Radeon HD 6770 1GB should in theory be a bit faster than the GeForce 9800 GT 1GB overall. (explain)

Radeon HD 6770 1GB		67200 MB/sec
GeForce 9800 GT 1GB		57600 MB/sec
	Difference: 9600 (17%)

Texel Rate

The Radeon HD 6770 1GB should be just a bit (about 7%) more effective at texture filtering than the GeForce 9800 GT 1GB. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce 9800 GT 1GB		33600 Mtexels/sec
	Difference: 2400 (7%)

Pixel Rate

The Radeon HD 6770 1GB will be much (approximately 50%) better at FSAA than the GeForce 9800 GT 1GB, and should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce 9800 GT 1GB		9600 Mpixels/sec
	Difference: 4800 (50%)

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 largest amount of data (in units of megabytes per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 in one second. This number is calculated 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.