GeForce GTX 480 vs Radeon HD 6770

Intro

Compare all that to the Radeon HD 6770, which comes with a core clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is made up of 800 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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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 6770		1520 points
	Difference: 2130 (140%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
GeForce GTX 480		250 Watts
	Difference: 142 Watts (131%)

Memory Bandwidth

In theory, the GeForce GTX 480 should perform quite a bit faster than the Radeon HD 6770 overall. (explain)

GeForce GTX 480		177408 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 110208 (164%)

Texel Rate

The GeForce GTX 480 should be a little bit (about 17%) more effective at texture filtering than the Radeon HD 6770. (explain)

GeForce GTX 480		42000 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 6000 (17%)

Pixel Rate

The GeForce GTX 480 is a lot (more or less 133%) faster with regards to FSAA than the Radeon HD 6770, and will be able to handle higher resolutions better. (explain)

GeForce GTX 480		33600 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 19200 (133%)

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 MB per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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