GeForce GTX 480 vs Radeon HD 4770

Intro

Compare those specs to the Radeon HD 4770, which has a clock speed of 750 MHz and a GDDR5 memory frequency of 800 MHz. It also features a 128-bit bus, and uses a 40 nm design. It is made up of 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770		80 Watts
GeForce GTX 480		250 Watts
	Difference: 170 Watts (213%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 480 is 247% quicker than the Radeon HD 4770 overall, because of its higher data rate. (explain)

GeForce GTX 480		177408 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 126208 (247%)

Texel Rate

The GeForce GTX 480 should be much (about 75%) more effective at anisotropic filtering than the Radeon HD 4770. (explain)

GeForce GTX 480		42000 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 18000 (75%)

Pixel Rate

The GeForce GTX 480 should be much (more or less 180%) better at full screen anti-aliasing than the Radeon HD 4770, and also should be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 480		33600 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 21600 (180%)

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 (counted in megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better 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 texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.