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GeForce 9800 GX2 vs Radeon HD 4670 1GB

Intro

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

Compare those specs to the Radeon HD 4670 1GB, which makes use of a 55 nm design. AMD has set the core frequency at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 RAM runs at a speed of 1100 MHz on this particular model. It features 320(64x5) SPUs along with 32 Texture Address Units and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 1GB 70 Watts
GeForce 9800 GX2 197 Watts
Difference: 127 Watts (181%)

Memory Bandwidth

Theoretically, the GeForce 9800 GX2 should be a lot faster than the Radeon HD 4670 1GB in general. (explain)

GeForce 9800 GX2 128000 MB/sec
Radeon HD 4670 1GB 35200 MB/sec
Difference: 92800 (264%)

Texel Rate

The GeForce 9800 GX2 should be much (about 220%) faster with regards to anisotropic filtering than the Radeon HD 4670 1GB. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
Radeon HD 4670 1GB 24000 Mtexels/sec
Difference: 52800 (220%)

Pixel Rate

The GeForce 9800 GX2 is a lot (more or less 220%) better at AA than the Radeon HD 4670 1GB, and also will be able to handle higher screen resolutions more effectively. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
Radeon HD 4670 1GB 6000 Mpixels/sec
Difference: 13200 (220%)

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 4670 1GB

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 4670 1GB
Manufacturer nVidia AMD
Year Mar 2008 Sep 10, 2008
Code Name G92 RV730 XT
Memory 512 MB (x2) 1024 MB
Core Speed 600 MHz (x2) 750 MHz
Memory Speed 2000 MHz (x2) 2200 MHz
Power (Max TDP) 197 watts 70 watts
Bandwidth 128000 MB/sec 35200 MB/sec
Texel Rate 76800 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 6000 Mpixels/sec
Unified Shaders 128 (x2) 320(64x5)
Texture Mapping Units 64 (x2) 32
Render Output Units 16 (x2) 8
Bus Type GDDR3 GDDR4/GDDR3/DDR3/DDR2
Bus Width 256-bit (x2) 128-bit
Fab Process 65 nm 55 nm
Transistors 754 million 514 million
Bus PCIe x16 2.0 PCIe 2.0 x16, AGP 8x
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the 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 amount of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). 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 ability to reach the max fill rate.

Display Prices

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GeForce 9800 GX2

Amazon.com

Check prices at:

Radeon HD 4670 1GB

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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