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GeForce 9800 GX2 vs Radeon HD 4730

Intro

The GeForce 9800 GX2 makes use of a 65 nm design. nVidia has clocked the core speed at 600 MHz. The GDDR3 memory is set to run at a speed of 1000 MHz on this particular card. It features 128 SPUs along with 64 TAUs and 16 Rasterization Operator Units.

Compare those specs to the Radeon HD 4730, which has a clock frequency of 700 MHz and a GDDR5 memory speed of 900 MHz. It also features a 128-bit bus, and uses a 55 nm design. It features 640(128x5) SPUs, 32 Texture Address Units, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4730 140 Watts
GeForce 9800 GX2 197 Watts
Difference: 57 Watts (41%)

Memory Bandwidth

Theoretically, the GeForce 9800 GX2 should be much faster than the Radeon HD 4730 overall. (explain)

GeForce 9800 GX2 128000 MB/sec
Radeon HD 4730 57600 MB/sec
Difference: 70400 (122%)

Texel Rate

The GeForce 9800 GX2 will be much (more or less 243%) faster with regards to anisotropic filtering than the Radeon HD 4730. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
Radeon HD 4730 22400 Mtexels/sec
Difference: 54400 (243%)

Pixel Rate

The GeForce 9800 GX2 should be much (more or less 243%) faster with regards to AA than the Radeon HD 4730, and will be capable of handling higher resolutions better. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
Radeon HD 4730 5600 Mpixels/sec
Difference: 13600 (243%)

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 4730

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 4730
Manufacturer nVidia AMD
Year Mar 2008 Jun 8, 2009
Code Name G92 RV770/CE
Memory 512 MB (x2) 512 MB
Core Speed 600 MHz (x2) 700 MHz
Memory Speed 2000 MHz (x2) 3600 MHz
Power (Max TDP) 197 watts 140 watts
Bandwidth 128000 MB/sec 57600 MB/sec
Texel Rate 76800 Mtexels/sec 22400 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 5600 Mpixels/sec
Unified Shaders 128 (x2) 640(128x5)
Texture Mapping Units 64 (x2) 32
Render Output Units 16 (x2) 8
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 65 nm 55 nm
Transistors 754 million 956 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 largest amount of information (measured in MB per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The number 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 output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 9800 GX2

Amazon.com

Check prices at:

Radeon HD 4730

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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