GeForce GTX 480 vs Radeon HD 7770

Intro

Compare that to the Radeon HD 7770, which has a core clock speed of 1000 MHz and a GDDR5 memory speed of 1125 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 480		3650 points
Radeon HD 7770		3180 points
	Difference: 470 (15%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
GeForce GTX 480		250 Watts
	Difference: 170 Watts (213%)

Memory Bandwidth

Performance-wise, the GeForce GTX 480 should theoretically be much superior to the Radeon HD 7770 in general. (explain)

GeForce GTX 480		177408 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 105408 (146%)

Texel Rate

The GeForce GTX 480 will be a small bit (about 5%) faster with regards to AF than the Radeon HD 7770. (explain)

GeForce GTX 480		42000 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 2000 (5%)

Pixel Rate

The GeForce GTX 480 will be much (approximately 110%) more effective at full screen anti-aliasing than the Radeon HD 7770, and also should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 480		33600 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 17600 (110%)

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 maximum amount of information (measured in megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 in one second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling 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 the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.