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GeForce 9800 GTX+ vs Radeon HD 6770

Intro

The GeForce 9800 GTX+ features a clock frequency of 738 MHz and a GDDR3 memory frequency of 1100 MHz. It also uses a 256-bit memory bus, and makes use of a 55 nm design. It is made up of 128 SPUs, 64 Texture Address Units, and 16 ROPs.

Compare those specifications to the Radeon HD 6770, which features a GPU core clock speed of 900 MHz, and 512 MB of GDDR5 memory running at 1050 MHz through a 128-bit bus. It also is comprised of 800 SPUs, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 108 Watts
GeForce 9800 GTX+ 145 Watts
Difference: 37 Watts (34%)

Memory Bandwidth

In theory, the GeForce 9800 GTX+ should be 5% quicker than the Radeon HD 6770 overall, due to its greater bandwidth. (explain)

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

Texel Rate

The GeForce 9800 GTX+ will be quite a bit (about 31%) better at anisotropic filtering than the Radeon HD 6770. (explain)

GeForce 9800 GTX+ 47232 Mtexels/sec
Radeon HD 6770 36000 Mtexels/sec
Difference: 11232 (31%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6770 is a better choice, by a large margin. (explain)

Radeon HD 6770 14400 Mpixels/sec
GeForce 9800 GTX+ 11808 Mpixels/sec
Difference: 2592 (22%)

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 July 2008 January 2011
Code Name G92b Juniper XT
Memory 512 MB 512 MB
Core Speed 738 MHz 900 MHz
Memory Speed 2200 MHz 4200 MHz
Power (Max TDP) 145 watts 108 watts
Bandwidth 70400 MB/sec 67200 MB/sec
Texel Rate 47232 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 11808 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 55 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 max amount of data (measured in MB per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 applied in one second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock 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 rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum 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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