GeForce 9800 GX2 vs Radeon HD 6670 (OEM) 1GB

Intro

Compare those specifications to the Radeon HD 6670 (OEM) 1GB, which features a core clock speed of 800 MHz and a GDDR5 memory frequency of 1000 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It features 480 SPUs, 24 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB		63 Watts
GeForce 9800 GX2		197 Watts
	Difference: 134 Watts (213%)

Memory Bandwidth

In theory, the GeForce 9800 GX2 should be much faster than the Radeon HD 6670 (OEM) 1GB overall. (explain)

GeForce 9800 GX2		128000 MB/sec
Radeon HD 6670 (OEM) 1GB		64000 MB/sec
	Difference: 64000 (100%)

Texel Rate

The GeForce 9800 GX2 will be much (more or less 300%) better at anisotropic filtering than the Radeon HD 6670 (OEM) 1GB. (explain)

GeForce 9800 GX2		76800 Mtexels/sec
Radeon HD 6670 (OEM) 1GB		19200 Mtexels/sec
	Difference: 57600 (300%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce 9800 GX2 is superior to the Radeon HD 6670 (OEM) 1GB, by a large margin. (explain)

GeForce 9800 GX2		19200 Mpixels/sec
Radeon HD 6670 (OEM) 1GB		6400 Mpixels/sec
	Difference: 12800 (200%)

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

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the video card will be at 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 record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core 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 is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.