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GeForce 9800 GX2 vs Radeon HD 3470 256MB

Intro

The GeForce 9800 GX2 uses a 65 nm design. nVidia has set the core frequency at 600 MHz. The GDDR3 RAM works at a speed of 1000 MHz on this specific card. It features 128 SPUs along with 64 TAUs and 16 Rasterization Operator Units.

Compare all that to the Radeon HD 3470 256MB, which comes with clock speeds of 800 MHz on the GPU, and 950 MHz on the 256 MB of DDR2 memory. It features 40(8x5) SPUs along with 4 TAUs and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce 9800 GX2 is 321% faster than the Radeon HD 3470 256MB in general, because of its higher data rate. (explain)

GeForce 9800 GX2 128000 MB/sec
Radeon HD 3470 256MB 30400 MB/sec
Difference: 97600 (321%)

Texel Rate

The GeForce 9800 GX2 should be much (approximately 2300%) more effective at AF than the Radeon HD 3470 256MB. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
Radeon HD 3470 256MB 3200 Mtexels/sec
Difference: 73600 (2300%)

Pixel Rate

The GeForce 9800 GX2 is a lot (approximately 500%) more effective at FSAA than the Radeon HD 3470 256MB, and also will be able to handle higher resolutions more effectively. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
Radeon HD 3470 256MB 3200 Mpixels/sec
Difference: 16000 (500%)

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

Check prices at:

Radeon HD 3470 256MB

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 HD 3470 256MB
Manufacturer nVidia AMD
Year Mar 2008 2008
Code Name G92 RV620 PRO
Memory 512 MB (x2) 256 MB
Core Speed 600 MHz (x2) 800 MHz
Memory Speed 2000 MHz (x2) 1900 MHz
Power (Max TDP) 197 watts (Unknown) watts
Bandwidth 128000 MB/sec 30400 MB/sec
Texel Rate 76800 Mtexels/sec 3200 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 3200 Mpixels/sec
Unified Shaders 128 (x2) 40(8x5)
Texture Mapping Units 64 (x2) 4
Render Output Units 16 (x2) 4
Bus Type GDDR3 DDR2
Bus Width 256-bit (x2) 128-bit
Fab Process 65 nm 55 nm
Transistors 754 million (Unknown) million
Bus PCIe x16 2.0 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, 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 maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce 9800 GX2

Amazon.com

Check prices at:

Radeon HD 3470 256MB

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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