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GeForce GTX 560 Ti vs Radeon HD 4890 1GB

Intro

The GeForce GTX 560 Ti comes with a GPU core clock speed of 822 MHz, and the 1024 MB of GDDR5 memory is set to run at 1002 MHz through a 256-bit bus. It also features 384 SPUs, 64 TAUs, and 32 ROPs.

Compare those specifications to the Radeon HD 4890 1GB, which uses a 55 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 RAM runs at a frequency of 975 MHz on this specific card. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

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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

The GeForce GTX 560 Ti, in theory, should be a small bit faster than the Radeon HD 4890 1GB overall. (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 will be a lot (about 32%) faster with regards to anisotropic 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

If using lots of anti-aliasing is important to you, then the GeForce GTX 560 Ti is a better choice, and very much so. (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 maximum amount of information (measured in MB per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher 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 amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core clock 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to 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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