GeForce GTX 465 vs Radeon HD 5770

Intro

Compare all that to the Radeon HD 5770, which has a core clock speed of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also makes use of a 128-bit bus, and makes use of a 40 nm design. It features 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

As far as performance goes, the GeForce GTX 465 should theoretically be quite a bit superior to 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 will be quite a bit (about 27%) more effective at texture filtering than the GeForce GTX 465. (explain)

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

Pixel Rate

The GeForce GTX 465 will be much (about 43%) better at anti-aliasing than the Radeon HD 5770, and also will be capable of handling higher resolutions more effectively. (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 max amount of data (in units of MB per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card 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 colour 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 rate is also dependant 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.