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GeForce GTX 560 Ti vs Radeon HD 4890 1GB

Intro

The GeForce GTX 560 Ti comes with a GPU clock speed of 822 MHz, and the 1024 MB of GDDR5 memory runs at 1002 MHz through a 256-bit bus. It also features 384 SPUs, 64 TAUs, and 32 Raster Operation Units.

Compare those specifications to the Radeon HD 4890 1GB, which comes with GPU core speed of 1000 MHz, and 1024 MB of GDDR5 RAM set to run at 975 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 40 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 560 Ti 170 Watts
Radeon HD 4890 1GB 190 Watts
Difference: 20 Watts (12%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 560 Ti will be 3% faster than the Radeon HD 4890 1GB in general, due to its higher bandwidth. (explain)

GeForce GTX 560 Ti 128256 MB/sec
Radeon HD 4890 1GB 124800 MB/sec
Difference: 3456 (3%)

Texel Rate

The GeForce GTX 560 Ti should be quite a bit (approximately 32%) better at texture filtering than the Radeon HD 4890 1GB. (explain)

GeForce GTX 560 Ti 52608 Mtexels/sec
Radeon HD 4890 1GB 40000 Mtexels/sec
Difference: 12608 (32%)

Pixel Rate

The GeForce GTX 560 Ti will be a lot (about 64%) more effective at AA than the Radeon HD 4890 1GB, and capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 560 Ti 26304 Mpixels/sec
Radeon HD 4890 1GB 16000 Mpixels/sec
Difference: 10304 (64%)

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 Ti

Amazon.com

Check prices at:

Radeon HD 4890 1GB

Amazon.com

Check prices at:

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 Ti Radeon HD 4890 1GB
Manufacturer nVidia AMD
Year January 2011 Apr 2, 2009
Code Name GF114 RV790 XT
Memory 1024 MB 1024 MB
Core Speed 822 MHz 1000 MHz
Memory Speed 4008 MHz 3900 MHz
Power (Max TDP) 170 watts 190 watts
Bandwidth 128256 MB/sec 124800 MB/sec
Texel Rate 52608 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 26304 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 384 800(160x5)
Texture Mapping Units 64 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 1950 million 959 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of data (measured in MB per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 560 Ti

Amazon.com

Check prices at:

Radeon HD 4890 1GB

Amazon.com

Check prices at:

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.

Comments

One Response to “GeForce GTX 560 Ti vs Radeon HD 4890 1GB”
Noirbard says:

So would you say that 2 XFX HD 4890's in Crossfire would out preform a GTX 560 ti?

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