GeForce 9800 GX2 vs Radeon HD 4670 512MB

Intro

Compare all of that to the Radeon HD 4670 512MB, which features GPU clock speed of 750 MHz, and 512 MB of GDDR4/GDDR3/DDR3/DDR2 RAM set to run at 1000 MHz through a 128-bit bus. It also is made up of 320(64x5) SPUs, 32 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
GeForce 9800 GX2		197 Watts
	Difference: 127 Watts (181%)

Memory Bandwidth

The GeForce 9800 GX2 should theoretically be quite a bit faster than the Radeon HD 4670 512MB in general. (explain)

GeForce 9800 GX2		128000 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 96000 (300%)

Texel Rate

The GeForce 9800 GX2 will be a lot (approximately 220%) faster with regards to anisotropic filtering than the Radeon HD 4670 512MB. (explain)

GeForce 9800 GX2		76800 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 52800 (220%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce 9800 GX2 is superior to the Radeon HD 4670 512MB, by a large margin. (explain)

GeForce 9800 GX2		19200 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 13200 (220%)

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: Memory bandwidth is the max amount of information (measured in MB per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high 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 number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.