Geforce GTX 770 vs Radeon HD 5850

Intro

Compare those specifications to the Radeon HD 5850, which has core clock speeds of 725 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 1440(288x5) SPUs as well as 72 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5850		151 Watts
Geforce GTX 770		230 Watts
	Difference: 79 Watts (52%)

Memory Bandwidth

Theoretically, the Geforce GTX 770 should perform much faster than the Radeon HD 5850 in general. (explain)

Geforce GTX 770		224384 MB/sec
Radeon HD 5850		128000 MB/sec
	Difference: 96384 (75%)

Texel Rate

The Geforce GTX 770 will be quite a bit (approximately 156%) more effective at AF than the Radeon HD 5850. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon HD 5850		52200 Mtexels/sec
	Difference: 81688 (156%)

Pixel Rate

The Geforce GTX 770 is a lot (more or less 44%) better at full screen anti-aliasing than the Radeon HD 5850, and should be capable of handling higher screen resolutions more effectively. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon HD 5850		23200 Mpixels/sec
	Difference: 10272 (44%)

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 MB per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.