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GeForce 8800 GTX vs Radeon HD 6670 (OEM)

Intro

The GeForce 8800 GTX makes use of a 90 nm design. nVidia has clocked the core frequency at 575 MHz. The GDDR3 memory works at a frequency of 900 MHz on this specific card. It features 128 SPUs along with 64 Texture Address Units and 24 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6670 (OEM), which comes with a clock frequency of 800 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It is comprised of 480 SPUs, 24 TAUs, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 63 Watts
GeForce 8800 GTX 155 Watts
Difference: 92 Watts (146%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 GTX should perform much faster than the Radeon HD 6670 (OEM) overall. (explain)

GeForce 8800 GTX 86400 MB/sec
Radeon HD 6670 (OEM) 64000 MB/sec
Difference: 22400 (35%)

Texel Rate

The GeForce 8800 GTX will be much (approximately 92%) faster with regards to AF than the Radeon HD 6670 (OEM). (explain)

GeForce 8800 GTX 36800 Mtexels/sec
Radeon HD 6670 (OEM) 19200 Mtexels/sec
Difference: 17600 (92%)

Pixel Rate

The GeForce 8800 GTX should be much (about 116%) more effective at full screen anti-aliasing than the Radeon HD 6670 (OEM), and should be capable of handling higher screen resolutions better. (explain)

GeForce 8800 GTX 13800 Mpixels/sec
Radeon HD 6670 (OEM) 6400 Mpixels/sec
Difference: 7400 (116%)

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 8800 GTX

Amazon.com

Check prices at:

Radeon HD 6670 (OEM)

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 8800 GTX Radeon HD 6670 (OEM)
Manufacturer nVidia AMD
Year Nov 2006 February 2011
Code Name G80 Turks
Memory 768 MB 512 MB
Core Speed 575 MHz 800 MHz
Memory Speed 1800 MHz 4000 MHz
Power (Max TDP) 155 watts 63 watts
Bandwidth 86400 MB/sec 64000 MB/sec
Texel Rate 36800 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 13800 Mpixels/sec 6400 Mpixels/sec
Unified Shaders 128 480
Texture Mapping Units 64 24
Render Output Units 24 8
Bus Type GDDR3 GDDR5
Bus Width 384-bit 128-bit
Fab Process 90 nm 40 nm
Transistors 681 million 715 million
Bus PCIe x16 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in MB per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the video 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 amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce 8800 GTX

Amazon.com

Check prices at:

Radeon HD 6670 (OEM)

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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