GeForce GTX 560 vs Radeon HD 7770

Intro

Compare that to the Radeon HD 7770, which has a GPU core clock speed of 1000 MHz, and 1024 MB of GDDR5 RAM set to run at 1125 MHz through a 128-bit bus. It also is made up of 640 Stream Processors, 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

Radeon HD 7770		3180 points
GeForce GTX 560		3030 points
	Difference: 150 (5%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
GeForce GTX 560		150 Watts
	Difference: 70 Watts (88%)

Memory Bandwidth

The GeForce GTX 560 should in theory be quite a bit faster than the Radeon HD 7770 in general. (explain)

GeForce GTX 560		128128 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 56128 (78%)

Texel Rate

The GeForce GTX 560 will be a little bit (more or less 13%) better at texture filtering than the Radeon HD 7770. (explain)

GeForce GTX 560		45360 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 5360 (13%)

Pixel Rate

The GeForce GTX 560 should be much (about 62%) faster with regards to full screen anti-aliasing than the Radeon HD 7770, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 560		25920 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 9920 (62%)

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: Bandwidth is the max amount of information (measured in MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record 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 the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.