GeForce 8800 GS vs Radeon HD 7770

Intro

Compare those specs to the Radeon HD 7770, which features core clock speeds of 1000 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 memory. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
GeForce 8800 GS		105 Watts
	Difference: 25 Watts (31%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7770 should be 88% quicker than the GeForce 8800 GS overall, because of its higher data rate. (explain)

Radeon HD 7770		72000 MB/sec
GeForce 8800 GS		38400 MB/sec
	Difference: 33600 (88%)

Texel Rate

The Radeon HD 7770 will be a lot (approximately 52%) faster with regards to texture filtering than the GeForce 8800 GS. (explain)

Radeon HD 7770		40000 Mtexels/sec
GeForce 8800 GS		26400 Mtexels/sec
	Difference: 13600 (52%)

Pixel Rate

The Radeon HD 7770 will be a lot (more or less 142%) better at full screen anti-aliasing than the GeForce 8800 GS, and should be capable of handling higher screen resolutions better. (explain)

Radeon HD 7770		16000 Mpixels/sec
GeForce 8800 GS		6600 Mpixels/sec
	Difference: 9400 (142%)

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 information (measured in MB per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 processed in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.