GeForce 9800 GT 1GB vs Geforce GTX 690

Intro

Compare all of that to the Geforce GTX 690, which has a clock frequency of 915 MHz and a GDDR5 memory frequency of 1502 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It is made up of 1536 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 1GB		105 Watts
Geforce GTX 690		300 Watts
	Difference: 195 Watts (186%)

Memory Bandwidth

The Geforce GTX 690 should theoretically perform much faster than the GeForce 9800 GT 1GB in general. (explain)

Geforce GTX 690		384512 MB/sec
GeForce 9800 GT 1GB		57600 MB/sec
	Difference: 326912 (568%)

Texel Rate

The Geforce GTX 690 will be much (about 597%) faster with regards to AF than the GeForce 9800 GT 1GB. (explain)

Geforce GTX 690		234240 Mtexels/sec
GeForce 9800 GT 1GB		33600 Mtexels/sec
	Difference: 200640 (597%)

Pixel Rate

The Geforce GTX 690 should be much (approximately 510%) better at FSAA than the GeForce 9800 GT 1GB, and should be able to handle higher resolutions without losing too much performance. (explain)

Geforce GTX 690		58560 Mpixels/sec
GeForce 9800 GT 1GB		9600 Mpixels/sec
	Difference: 48960 (510%)

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 maximum amount of data (in units of megabytes per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high 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 amount of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.