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GeForce GTX 560 vs Radeon HD 7770

Intro

The GeForce GTX 560 uses a 40 nm design. nVidia has set the core frequency at 810 MHz. The GDDR5 memory runs at a speed of 1001 MHz on this specific model. It features 336 SPUs along with 56 TAUs and 32 Rasterization Operator Units.

Compare that to the Radeon HD 7770, which features a core clock speed of 1000 MHz and a GDDR5 memory speed of 1125 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It is made up of 640 SPUs, 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

Theoretically speaking, the GeForce GTX 560 should 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 just a bit (more or less 13%) faster with regards to 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 should be much (more or less 62%) faster with regards to FSAA than the Radeon HD 7770, and also capable of handling higher screen resolutions without losing too much performance. (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

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

Model GeForce GTX 560 Radeon HD 7770
Manufacturer nVidia AMD
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 largest amount of data (measured in MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units of the card 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the clock speed of the card. 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 rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability 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. 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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