GeForce GTX 465 vs Radeon HD 5770

Intro

Compare all of that to the Radeon HD 5770, which comes with a clock speed 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 comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
GeForce GTX 465		200 Watts
	Difference: 92 Watts (85%)

Memory Bandwidth

In theory, the GeForce GTX 465 should perform much faster than the Radeon HD 5770 overall. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 25792 (34%)

Texel Rate

The Radeon HD 5770 is a lot (about 27%) better at AF than the GeForce GTX 465. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 7292 (27%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 465 is the winner, by far. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 5824 (43%)

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 (counted in MB per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount 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 applied in a second.

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