GeForce GTX 460 SE vs Radeon HD 4770

Intro

Compare that to the Radeon HD 4770, which features a core clock speed of 750 MHz and a GDDR5 memory speed of 800 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It is made up of 640(128x5) SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770		80 Watts
GeForce GTX 460 SE		150 Watts
	Difference: 70 Watts (88%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 460 SE is 113% faster than the Radeon HD 4770 overall, because of its greater data rate. (explain)

GeForce GTX 460 SE		108800 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 57600 (113%)

Texel Rate

The GeForce GTX 460 SE is a lot (more or less 30%) faster with regards to anisotropic filtering than the Radeon HD 4770. (explain)

GeForce GTX 460 SE		31200 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 7200 (30%)

Pixel Rate

The GeForce GTX 460 SE should be much (approximately 73%) more effective at AA than the Radeon HD 4770, and also should be able to handle higher resolutions better. (explain)

GeForce GTX 460 SE		20800 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 8800 (73%)

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 max amount of information (in units of MB per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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