GeForce 8800 GT 512MB vs Radeon HD 5770

Intro

Compare all of that to the Radeon HD 5770, which has core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB		105 Watts
Radeon HD 5770		108 Watts
	Difference: 3 Watts (3%)

Memory Bandwidth

As far as performance goes, the Radeon HD 5770 should theoretically be much better than the GeForce 8800 GT 512MB in general. (explain)

Radeon HD 5770		76800 MB/sec
GeForce 8800 GT 512MB		57600 MB/sec
	Difference: 19200 (33%)

Texel Rate

The Radeon HD 5770 will be a little bit (more or less 1%) faster with regards to AF than the GeForce 8800 GT 512MB. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce 8800 GT 512MB		33600 Mtexels/sec
	Difference: 400 (1%)

Pixel Rate

The Radeon HD 5770 should be a lot (approximately 42%) more effective at FSAA than the GeForce 8800 GT 512MB, and will be able to handle higher resolutions while still performing well. (explain)

Radeon HD 5770		13600 Mpixels/sec
GeForce 8800 GT 512MB		9600 Mpixels/sec
	Difference: 4000 (42%)

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 maximum amount of data (measured in MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

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