GeForce 8800 GTS (G92) vs Radeon HD 6770

Intro

Compare those specs to the Radeon HD 6770, which features a clock speed of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also makes use of a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 800 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
GeForce 8800 GTS (G92)		135 Watts
	Difference: 27 Watts (25%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6770 should theoretically be a bit superior to the GeForce 8800 GTS (G92) overall. (explain)

Radeon HD 6770		67200 MB/sec
GeForce 8800 GTS (G92)		62080 MB/sec
	Difference: 5120 (8%)

Texel Rate

The GeForce 8800 GTS (G92) should be just a bit (approximately 16%) faster with regards to AF than the Radeon HD 6770. (explain)

GeForce 8800 GTS (G92)		41600 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 5600 (16%)

Pixel Rate

The Radeon HD 6770 will be quite a bit (approximately 38%) more effective at AA than the GeForce 8800 GTS (G92), and also should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 6770		14400 Mpixels/sec
GeForce 8800 GTS (G92)		10400 Mpixels/sec
	Difference: 4000 (38%)

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 data (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.