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GeForce GTX 560 vs Radeon HD 7770

Intro

The GeForce GTX 560 makes use of a 40 nm design. nVidia has set the core speed at 810 MHz. The GDDR5 RAM works at a speed of 1001 MHz on this particular card. It features 336 SPUs along with 56 TAUs and 32 ROPs.

Compare all of that to the Radeon HD 7770, which features GPU core speed of 1000 MHz, and 1024 MB of GDDR5 RAM running at 1125 MHz through a 128-bit bus. It also is comprised of 640 Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

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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

As far as performance goes, the GeForce GTX 560 should in theory be quite a bit superior to the Radeon HD 7770 overall. (explain)

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

Texel Rate

The GeForce GTX 560 should be a little bit (about 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 is quite a bit (about 62%) better at AA than the Radeon HD 7770, and should be capable of handling higher 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

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GeForce GTX 560

Amazon.com

Radeon HD 7770

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GTX 560 Radeon HD 7770
Manufacturer nVidia AMD
Year May 2011 February 2012
Code Name GF114 Cape Verde XT
Memory 1024 MB 1024 MB
Core Speed 810 MHz 1000 MHz
Memory Speed 4004 MHz 4500 MHz
Power (Max TDP) 150 watts 80 watts
Bandwidth 128128 MB/sec 72000 MB/sec
Texel Rate 45360 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 25920 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 336 640
Texture Mapping Units 56 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 1950 million 1500 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR 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 number of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Comments

One Response to “GeForce GTX 560 vs Radeon HD 7770”
New budget pc. Rs 32k. Suggestions and advices needed plz. - Page 2 says:

[...] New budget pc. Rs 32k. Suggestions and advices needed plz. 560 and 7770 comparision: GeForce GTX 560 vs Radeon HD 7770 I would guess, the 6870 is a better competitor for the 560. [...]

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