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GeForce GTX 260 216SP 55 nm vs Radeon HD 4790

Intro

The GeForce GTX 260 216SP 55 nm uses a 55 nm design. nVidia has clocked the core frequency at 576 MHz. The GDDR3 RAM is set to run at a frequency of 999 MHz on this model. It features 216 SPUs along with 72 TAUs and 28 Rasterization Operator Units.

Compare those specs to the Radeon HD 4790, which features a GPU core clock speed of 600 MHz, and 512 MB of GDDR5 RAM running at 800 MHz through a 256-bit bus. It also features 640(128x5) SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce GTX 260 216SP 55 nm should in theory be a little bit superior to the Radeon HD 4790 in general. (explain)

GeForce GTX 260 216SP 55 nm 111888 MB/sec
Radeon HD 4790 102400 MB/sec
Difference: 9488 (9%)

Texel Rate

The GeForce GTX 260 216SP 55 nm will be much (more or less 116%) better at AF than the Radeon HD 4790. (explain)

GeForce GTX 260 216SP 55 nm 41472 Mtexels/sec
Radeon HD 4790 19200 Mtexels/sec
Difference: 22272 (116%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 260 216SP 55 nm is a better choice, by a large margin. (explain)

GeForce GTX 260 216SP 55 nm 16128 Mpixels/sec
Radeon HD 4790 9600 Mpixels/sec
Difference: 6528 (68%)

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 260 216SP 55 nm

Amazon.com

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Radeon HD 4790

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 260 216SP 55 nm Radeon HD 4790
Manufacturer nVidia AMD
Year December 22, 2008 2009
Code Name G200b RV790
Memory 896 MB 512 MB
Core Speed 576 MHz 600 MHz
Memory Speed 1998 MHz 3200 MHz
Power (Max TDP) 171 watts (Unknown) watts
Bandwidth 111888 MB/sec 102400 MB/sec
Texel Rate 41472 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 16128 Mpixels/sec 9600 Mpixels/sec
Unified Shaders 216 640(128x5)
Texture Mapping Units 72 32
Render Output Units 28 16
Bus Type GDDR3 GDDR5
Bus Width 448-bit 256-bit
Fab Process 55 nm 55 nm
Transistors 1400 million 959 million
Bus PCIe x16 2.0 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.1 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If 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 amount of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its 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 the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GTX 260 216SP 55 nm

Amazon.com

Check prices at:

Radeon HD 4790

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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