GeForce GTX 650 vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which makes use of a 40 nm design. AMD has clocked the core frequency at 850 MHz. The GDDR5 RAM works at a speed of 1200 MHz on this specific model. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator 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 bit faster than the Radeon HD 5770 overall. (explain)

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

Texel Rate

The Radeon HD 5770 is a small bit (approximately 0%) faster with regards to AF 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 should be a lot (about 24%) better at AA than the Radeon HD 5770, and should be capable of handling higher screen resolutions while still performing well. (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 megabytes per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 applied in one second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate 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 rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.