Geforce GTX 770 vs Radeon HD 5770

Intro

Compare that to the Radeon HD 5770, which uses a 40 nm design. AMD has clocked the core frequency at 850 MHz. The GDDR5 RAM is set to run at a speed of 1200 MHz on this particular card. 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)

Radeon HD 5770		108 Watts
Geforce GTX 770		230 Watts
	Difference: 122 Watts (113%)

Memory Bandwidth

Performance-wise, the Geforce GTX 770 should theoretically be much superior to the Radeon HD 5770 in general. (explain)

Geforce GTX 770		224384 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 147584 (192%)

Texel Rate

The Geforce GTX 770 should be a lot (about 294%) more effective at anisotropic filtering than the Radeon HD 5770. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 99888 (294%)

Pixel Rate

The Geforce GTX 770 is quite a bit (approximately 146%) better at FSAA than the Radeon HD 5770, and will be capable of handling higher screen resolutions without losing too much performance. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 19872 (146%)

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 max amount of data (measured in megabytes per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 number 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 of the card by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.