Geforce GTX 770 vs Radeon HD 5550

Intro

Compare those specifications to the Radeon HD 5550, which comes with a clock frequency of 550 MHz and a DDR2 memory frequency of 400 MHz. It also uses a 128-bit bus, and makes use of a 40 nm design. It is comprised of 320(64x5) SPUs, 16 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Geforce GTX 770 should theoretically be much faster than the Radeon HD 5550 overall. (explain)

Geforce GTX 770		224384 MB/sec
Radeon HD 5550		12800 MB/sec
	Difference: 211584 (1653%)

Texel Rate

The Geforce GTX 770 is a lot (approximately 1421%) more effective at AF than the Radeon HD 5550. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon HD 5550		8800 Mtexels/sec
	Difference: 125088 (1421%)

Pixel Rate

The Geforce GTX 770 is much (about 661%) faster with regards to FSAA than the Radeon HD 5550, and able to handle higher screen resolutions more effectively. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon HD 5550		4400 Mpixels/sec
	Difference: 29072 (661%)

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 (in units of megabytes per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's 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 is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.