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GeForce 9800 GTX vs Radeon HD 3470 256MB

Intro

The GeForce 9800 GTX uses a 65 nm design. nVidia has clocked the core frequency at 675 MHz. The GDDR3 RAM is set to run at a frequency of 1100 MHz on this card. It features 128 SPUs along with 64 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon HD 3470 256MB, which makes use of a 55 nm design. AMD has clocked the core speed at 800 MHz. The DDR2 memory runs at a frequency of 950 MHz on this particular card. It features 40(8x5) SPUs as well as 4 Texture Address Units and 4 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce 9800 GTX should theoretically be much faster than the Radeon HD 3470 256MB overall. (explain)

GeForce 9800 GTX 70400 MB/sec
Radeon HD 3470 256MB 30400 MB/sec
Difference: 40000 (132%)

Texel Rate

The GeForce 9800 GTX will be a lot (approximately 1250%) more effective at anisotropic filtering than the Radeon HD 3470 256MB. (explain)

GeForce 9800 GTX 43200 Mtexels/sec
Radeon HD 3470 256MB 3200 Mtexels/sec
Difference: 40000 (1250%)

Pixel Rate

The GeForce 9800 GTX should be quite a bit (more or less 238%) better at FSAA than the Radeon HD 3470 256MB, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce 9800 GTX 10800 Mpixels/sec
Radeon HD 3470 256MB 3200 Mpixels/sec
Difference: 7600 (238%)

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 9800 GTX

Amazon.com

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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 GTX Radeon HD 3470 256MB
Manufacturer nVidia AMD
Year April 2008 2008
Code Name G92 RV620 PRO
Memory 512 MB 256 MB
Core Speed 675 MHz 800 MHz
Memory Speed 2200 MHz 1900 MHz
Power (Max TDP) 140 watts (Unknown) watts
Bandwidth 70400 MB/sec 30400 MB/sec
Texel Rate 43200 Mtexels/sec 3200 Mtexels/sec
Pixel Rate 10800 Mpixels/sec 3200 Mpixels/sec
Unified Shaders 128 40(8x5)
Texture Mapping Units 64 4
Render Output Units 16 4
Bus Type GDDR3 DDR2
Bus Width 256-bit 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: Bandwidth is the maximum amount of data (counted in MB per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total number of texture units of the card by the core 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of 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 output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce 9800 GTX

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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