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GeForce 9800 GX2 vs Radeon R9 295X2

Intro

The GeForce 9800 GX2 comes with a core clock frequency of 600 MHz and a GDDR3 memory frequency of 1000 MHz. It also uses a 256-bit memory bus, and makes use of a 65 nm design. It features 128 SPUs, 64 TAUs, and 16 Raster Operation Units.

Compare all that to the Radeon R9 295X2, which features GPU clock speed of 1018 MHz, and 4096 MB of GDDR5 RAM running at 1250 MHz through a 512-bit bus. It also features 2816 SPUs, 176 TAUs, and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GX2 197 Watts
Radeon R9 295X2 500 Watts
Difference: 303 Watts (154%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 295X2 will be 400% faster than the GeForce 9800 GX2 overall, due to its greater bandwidth. (explain)

Radeon R9 295X2 640000 MB/sec
GeForce 9800 GX2 128000 MB/sec
Difference: 512000 (400%)

Texel Rate

The Radeon R9 295X2 is quite a bit (about 367%) more effective at texture filtering than the GeForce 9800 GX2. (explain)

Radeon R9 295X2 358336 Mtexels/sec
GeForce 9800 GX2 76800 Mtexels/sec
Difference: 281536 (367%)

Pixel Rate

The Radeon R9 295X2 will be quite a bit (more or less 579%) better at full screen anti-aliasing than the GeForce 9800 GX2, and should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 295X2 130304 Mpixels/sec
GeForce 9800 GX2 19200 Mpixels/sec
Difference: 111104 (579%)

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 295X2

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 295X2
Manufacturer nVidia AMD
Year Mar 2008 April 2014
Code Name G92 Vesuvius
Memory 512 MB (x2) 4096 MB (x2)
Core Speed 600 MHz (x2) 1018 MHz (x2)
Memory Speed 2000 MHz (x2) 5000 MHz (x2)
Power (Max TDP) 197 watts 500 watts
Bandwidth 128000 MB/sec 640000 MB/sec
Texel Rate 76800 Mtexels/sec 358336 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 130304 Mpixels/sec
Unified Shaders 128 (x2) 2816 (x2)
Texture Mapping Units 64 (x2) 176 (x2)
Render Output Units 16 (x2) 64 (x2)
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 512-bit (x2)
Fab Process 65 nm 28 nm
Transistors 754 million 6200 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: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 applied per second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, 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 most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce 9800 GX2

Amazon.com

Check prices at:

Radeon R9 295X2

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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