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GeForce GTX 560 Ti 448 vs Radeon HD 4890 1GB

Intro

The GeForce GTX 560 Ti 448 features a GPU clock speed of 732 MHz, and the 1280 MB of GDDR5 RAM runs at 900 MHz through a 320-bit bus. It also is comprised of 448 SPUs, 56 Texture Address Units, and 40 Raster Operation Units.

Compare all of that to the Radeon HD 4890 1GB, which makes use of a 55 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 memory is set to run at a frequency of 975 MHz on this model. 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)

Radeon HD 4890 1GB 190 Watts
GeForce GTX 560 Ti 448 210 Watts
Difference: 20 Watts (11%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 560 Ti 448 should be a bit faster than the Radeon HD 4890 1GB overall. (explain)

GeForce GTX 560 Ti 448 144000 MB/sec
Radeon HD 4890 1GB 124800 MB/sec
Difference: 19200 (15%)

Texel Rate

The GeForce GTX 560 Ti 448 should be a small bit (approximately 2%) better at texture filtering than the Radeon HD 4890 1GB. (explain)

GeForce GTX 560 Ti 448 40992 Mtexels/sec
Radeon HD 4890 1GB 40000 Mtexels/sec
Difference: 992 (2%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 560 Ti 448 is a better choice, by a large margin. (explain)

GeForce GTX 560 Ti 448 29280 Mpixels/sec
Radeon HD 4890 1GB 16000 Mpixels/sec
Difference: 13280 (83%)

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 448

Amazon.com

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Radeon HD 4890 1GB

Amazon.com

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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 448 Radeon HD 4890 1GB
Manufacturer nVidia AMD
Year December 2011 Apr 2, 2009
Code Name GF110 RV790 XT
Memory 1280 MB 1024 MB
Core Speed 732 MHz 1000 MHz
Memory Speed 3600 MHz 3900 MHz
Power (Max TDP) 210 watts 190 watts
Bandwidth 144000 MB/sec 124800 MB/sec
Texel Rate 40992 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 29280 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 448 800(160x5)
Texture Mapping Units 56 40
Render Output Units 40 16
Bus Type GDDR5 GDDR5
Bus Width 320-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 3000 million 959 million
Bus PCIe 2.0 x16 PCIe 2.0 x16
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.2 OpenGL 3.0

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR 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 texture units by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number 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 outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 560 Ti 448

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.

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