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GeForce 9800 GX2 vs Radeon HD 3470 512MB

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 along with 64 TAUs and 16 Rasterization Operator Units.

Compare that to the Radeon HD 3470 512MB, which has GPU clock speed of 800 MHz, and 512 MB of GDDR3 memory set to run at 950 MHz through a 128-bit bus. It also is comprised of 40(8x5) Stream Processors, 4 TAUs, and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce 9800 GX2, in theory, should perform a lot faster than the Radeon HD 3470 512MB in general. (explain)

GeForce 9800 GX2 128000 MB/sec
Radeon HD 3470 512MB 30400 MB/sec
Difference: 97600 (321%)

Texel Rate

The GeForce 9800 GX2 will be a lot (about 2300%) faster with regards to anisotropic filtering than the Radeon HD 3470 512MB. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
Radeon HD 3470 512MB 3200 Mtexels/sec
Difference: 73600 (2300%)

Pixel Rate

The GeForce 9800 GX2 is a lot (approximately 500%) faster with regards to anti-aliasing than the Radeon HD 3470 512MB, and capable of handling higher resolutions better. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
Radeon HD 3470 512MB 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 512MB

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 512MB
Manufacturer nVidia AMD
Year Mar 2008 2008
Code Name G92 RV620 PRO
Memory 512 MB (x2) 512 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 GDDR3
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 (in units of MB per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 are applied in one second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out 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 drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 9800 GX2

Amazon.com

Check prices at:

Radeon HD 3470 512MB

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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