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GeForce GTX 560 vs Radeon HD 7770

Intro

The GeForce GTX 560 comes with clock speeds of 810 MHz on the GPU, and 1001 MHz on the 1024 MB of GDDR5 RAM. It features 336 SPUs as well as 56 TAUs and 32 ROPs.

Compare those specs to the Radeon HD 7770, which has core speeds of 1000 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 RAM. It features 640 SPUs along with 40 Texture Address Units and 16 ROPs.

(No game benchmarks for this combination yet.)

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 in general. (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 small bit (about 13%) more effective at AF 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%) more effective at full screen anti-aliasing than the Radeon HD 7770, and able to handle higher screen resolutions better. (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

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

GeForce GTX 560

Amazon.com

Other US-based stores

Radeon HD 7770

Amazon.com

Other US-based stores

Specifications

Model GeForce GTX 560 Radeon HD 7770
Manufacturer nVidia ATi
Year May 2011 February 2012
Code Name GF114 Cape Verde XT
Fab Process 40 nm 28 nm
Bus PCIe 2.0 x16 PCIe 3.0 x16
Memory 1024 MB 1024 MB
Core Speed 810 MHz 1000 MHz
Shader Speed 1600 MHz (N/A) MHz
Memory Speed 1001 MHz (4004 MHz effective) 1125 MHz (4500 MHz effective)
Unified Shaders 336 640
Texture Mapping Units 56 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2
Power (Max TDP) 150 watts 80 watts
Shader Model 5.0 5.0
Bandwidth 128128 MB/sec 72000 MB/sec
Texel Rate 45360 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 25920 Mpixels/sec 16000 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range 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 texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Comments

One Response to “GeForce GTX 560 vs Radeon HD 7770”
[...] 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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