GeForce GTX 650 vs Radeon HD 5770

Intro

Compare all that to the Radeon HD 5770, which comes with a clock frequency of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It is made up of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Radeon HD 5770		108 Watts
	Difference: 44 Watts (69%)

Memory Bandwidth

Theoretically, the GeForce GTX 650 should perform a little bit faster than the Radeon HD 5770 in general. (explain)

GeForce GTX 650		80000 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 3200 (4%)

Texel Rate

The Radeon HD 5770 should be a little bit (more or less 0%) more effective at anisotropic filtering than the GeForce GTX 650. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 144 (0%)

Pixel Rate

The GeForce GTX 650 will be much (approximately 24%) better at AA than the Radeon HD 5770, and also will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 3328 (24%)

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: Bandwidth is the largest amount of data (counted in MB per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the 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 are processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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