GeForce 9800 GTX+ vs Radeon HD 6770 1GB

Intro

Compare those specifications to the Radeon HD 6770 1GB, which comes with core clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
GeForce 9800 GTX+		145 Watts
	Difference: 37 Watts (34%)

Memory Bandwidth

Theoretically speaking, the GeForce 9800 GTX+ should be 5% faster than the Radeon HD 6770 1GB overall, due to its greater bandwidth. (explain)

GeForce 9800 GTX+		70400 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 3200 (5%)

Texel Rate

The GeForce 9800 GTX+ will be quite a bit (approximately 31%) faster with regards to AF than the Radeon HD 6770 1GB. (explain)

GeForce 9800 GTX+		47232 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 11232 (31%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6770 1GB is a better choice, by a large margin. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce 9800 GTX+		11808 Mpixels/sec
	Difference: 2592 (22%)

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 maximum amount of information (in units of megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 amount of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of texture units 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 applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.