GeForce GTX 295 vs Radeon HD 6770 1GB

Intro

Compare all of that to the Radeon HD 6770 1GB, which uses a 40 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 RAM runs at a frequency of 1050 MHz on this particular model. It features 800 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
GeForce GTX 295		289 Watts
	Difference: 181 Watts (168%)

Memory Bandwidth

Performance-wise, the GeForce GTX 295 should theoretically be much better than the Radeon HD 6770 1GB in general. (explain)

GeForce GTX 295		223776 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 156576 (233%)

Texel Rate

The GeForce GTX 295 is a lot (more or less 156%) better at anisotropic filtering than the Radeon HD 6770 1GB. (explain)

GeForce GTX 295		92160 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 56160 (156%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 295 is a better choice, by far. (explain)

GeForce GTX 295		32256 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 17856 (124%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total texture units by the core speed of the chip. The better this number, 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 maximum amount of pixels the video 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 amount of Render Output Units 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 also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.