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GeForce 9800 GX2 vs Radeon R9 270

Intro

The GeForce 9800 GX2 uses a 65 nm design. nVidia has set the core speed at 600 MHz. The GDDR3 memory is set to run at a speed of 1000 MHz on this specific card. It features 128 SPUs as well as 64 TAUs and 16 Rasterization Operator Units.

Compare those specifications to the Radeon R9 270, which makes use of a 28 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 RAM is set to run at a frequency of 1400 MHz on this particular card. It features 1280 SPUs as well as 80 TAUs and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270 150 Watts
GeForce 9800 GX2 197 Watts
Difference: 47 Watts (31%)

Memory Bandwidth

In theory, the Radeon R9 270 should be quite a bit faster than the GeForce 9800 GX2 in general. (explain)

Radeon R9 270 179200 MB/sec
GeForce 9800 GX2 128000 MB/sec
Difference: 51200 (40%)

Texel Rate

The GeForce 9800 GX2 is a bit (about 7%) faster with regards to texture filtering than the Radeon R9 270. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
Radeon R9 270 72000 Mtexels/sec
Difference: 4800 (7%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 270 is the winner, and very much so. (explain)

Radeon R9 270 28800 Mpixels/sec
GeForce 9800 GX2 19200 Mpixels/sec
Difference: 9600 (50%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce 9800 GX2

Amazon.com

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Radeon R9 270

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 9800 GX2 Radeon R9 270
Manufacturer nVidia AMD
Year Mar 2008 November 2013
Code Name G92 Curacao Pro
Memory 512 MB (x2) 2048 MB
Core Speed 600 MHz (x2) 900 MHz
Memory Speed 2000 MHz (x2) 5600 MHz
Power (Max TDP) 197 watts 150 watts
Bandwidth 128000 MB/sec 179200 MB/sec
Texel Rate 76800 Mtexels/sec 72000 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 128 (x2) 1280
Texture Mapping Units 64 (x2) 80
Render Output Units 16 (x2) 32
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 256-bit
Fab Process 65 nm 28 nm
Transistors 754 million 2800 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of MB per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the 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 in one second. This figure is calculated by multiplying the total number 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core 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 of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 9800 GX2

Amazon.com

Check prices at:

Radeon R9 270

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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