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GeForce GTX 560 vs Radeon HD 7770

Intro

The GeForce GTX 560 comes with core clock speeds of 810 MHz on the GPU, and 1001 MHz on the 1024 MB of GDDR5 RAM. It features 336 SPUs along with 56 TAUs and 32 Rasterization Operator Units.

Compare 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 features 640 Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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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

The GeForce GTX 560, in theory, should be a lot 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 small bit (more or less 13%) more effective at anisotropic 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 will be much (approximately 62%) more effective at FSAA than the Radeon HD 7770, and capable of handling higher screen resolutions while still performing well. (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

GeForce GTX 560

Radeon HD 7770

Specifications

Display 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 max amount of information (in units of MB per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number 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 worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

GeForce GTX 560

Radeon HD 7770

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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