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GeForce 9800 GTX vs Radeon HD 6770

Intro

The GeForce 9800 GTX features clock speeds of 675 MHz on the GPU, and 1100 MHz on the 512 MB of GDDR3 memory. It features 128 SPUs along with 64 Texture Address Units and 16 Rasterization Operator Units.

Compare those specs to the Radeon HD 6770, which makes use of a 40 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 memory runs at a speed of 1050 MHz on this card. It features 800 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 108 Watts
GeForce 9800 GTX 140 Watts
Difference: 32 Watts (30%)

Memory Bandwidth

Theoretically, the GeForce 9800 GTX should be a small bit faster than the Radeon HD 6770 in general. (explain)

GeForce 9800 GTX 70400 MB/sec
Radeon HD 6770 67200 MB/sec
Difference: 3200 (5%)

Texel Rate

The GeForce 9800 GTX should be a small bit (approximately 20%) faster with regards to AF than the Radeon HD 6770. (explain)

GeForce 9800 GTX 43200 Mtexels/sec
Radeon HD 6770 36000 Mtexels/sec
Difference: 7200 (20%)

Pixel Rate

The Radeon HD 6770 is a lot (approximately 33%) faster with regards to FSAA than the GeForce 9800 GTX, and also capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 6770 14400 Mpixels/sec
GeForce 9800 GTX 10800 Mpixels/sec
Difference: 3600 (33%)

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

Check prices at:

Radeon HD 6770

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 6770
Manufacturer nVidia AMD
Year April 2008 January 2011
Code Name G92 Juniper XT
Memory 512 MB 512 MB
Core Speed 675 MHz 900 MHz
Memory Speed 2200 MHz 4200 MHz
Power (Max TDP) 140 watts 108 watts
Bandwidth 70400 MB/sec 67200 MB/sec
Texel Rate 43200 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 10800 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 128 800
Texture Mapping Units 64 40
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 65 nm 40 nm
Transistors 754 million 1040 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses 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 per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core 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 rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce 9800 GTX

Amazon.com

Check prices at:

Radeon HD 6770

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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