GeForce GTX 275 vs Radeon HD 6770

Intro

Compare that to the Radeon HD 6770, which comes with GPU clock speed of 900 MHz, and 512 MB of GDDR5 RAM set to run at 1050 MHz through a 128-bit bus. It also features 800 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
GeForce GTX 275		219 Watts
	Difference: 111 Watts (103%)

Memory Bandwidth

Performance-wise, the GeForce GTX 275 should theoretically be a lot better than the Radeon HD 6770 overall. (explain)

GeForce GTX 275		127008 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 59808 (89%)

Texel Rate

The GeForce GTX 275 will be quite a bit (about 41%) faster with regards to AF than the Radeon HD 6770. (explain)

GeForce GTX 275		50640 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 14640 (41%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 275 is superior to the Radeon HD 6770, by far. (explain)

GeForce GTX 275		17724 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 3324 (23%)

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.