GeForce GTX 650 vs Radeon HD 5770

Intro

Compare that to the Radeon HD 5770, which features 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 Texture Address Units, 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 small 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 is a bit (approximately 0%) better at texture filtering than the GeForce GTX 650. (explain)

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

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 650 is a better choice, and very much so. (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: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The better this number, 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 could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.