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GeForce 9800 GX2 vs Radeon HD 5770

Intro

The GeForce 9800 GX2 has a GPU clock speed of 600 MHz, and the 512 MB of GDDR3 memory is set to run at 1000 MHz through a 256-bit bus. It also is made up of 128 Stream Processors, 64 TAUs, and 16 ROPs.

Compare those specifications to the Radeon HD 5770, which uses a 40 nm design. AMD has clocked the core speed at 850 MHz. The GDDR5 memory is set to run at a frequency of 1200 MHz on this specific card. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770 108 Watts
GeForce 9800 GX2 197 Watts
Difference: 89 Watts (82%)

Memory Bandwidth

In theory, the GeForce 9800 GX2 is 67% quicker than the Radeon HD 5770 overall, due to its higher bandwidth. (explain)

GeForce 9800 GX2 128000 MB/sec
Radeon HD 5770 76800 MB/sec
Difference: 51200 (67%)

Texel Rate

The GeForce 9800 GX2 will be quite a bit (about 126%) more effective at texture filtering than the Radeon HD 5770. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
Radeon HD 5770 34000 Mtexels/sec
Difference: 42800 (126%)

Pixel Rate

The GeForce 9800 GX2 will be quite a bit (approximately 41%) faster with regards to FSAA than the Radeon HD 5770, and also able to handle higher resolutions more effectively. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
Radeon HD 5770 13600 Mpixels/sec
Difference: 5600 (41%)

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 5770

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 5770
Manufacturer nVidia AMD
Year Mar 2008 October 13, 2009
Code Name G92 Juniper XT
Memory 512 MB (x2) 1024 MB
Core Speed 600 MHz (x2) 850 MHz
Memory Speed 2000 MHz (x2) 4800 MHz
Power (Max TDP) 197 watts 108 watts
Bandwidth 128000 MB/sec 76800 MB/sec
Texel Rate 76800 Mtexels/sec 34000 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 13600 Mpixels/sec
Unified Shaders 128 (x2) 800(160x5)
Texture Mapping Units 64 (x2) 40
Render Output Units 16 (x2) 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 65 nm 40 nm
Transistors 754 million 1040 million
Bus PCIe x16 2.0 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total texture units by the core 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics 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 number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the 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 5770

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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