GeForce GTS 150 vs Geforce GTX 690

Intro

Compare all of that to the Geforce GTX 690, which features GPU clock speed of 915 MHz, and 2048 MB of GDDR5 memory running at 1502 MHz through a 256-bit bus. It also is comprised of 1536 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 150		141 Watts
Geforce GTX 690		300 Watts
	Difference: 159 Watts (113%)

Memory Bandwidth

Theoretically, the Geforce GTX 690 should be a lot faster than the GeForce GTS 150 in general. (explain)

Geforce GTX 690		384512 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 352512 (1102%)

Texel Rate

The Geforce GTX 690 should be much (about 395%) more effective at AF than the GeForce GTS 150. (explain)

Geforce GTX 690		234240 Mtexels/sec
GeForce GTS 150		47360 Mtexels/sec
	Difference: 186880 (395%)

Pixel Rate

The Geforce GTX 690 will be quite a bit (approximately 395%) better at AA than the GeForce GTS 150, and will be capable of handling higher resolutions while still performing well. (explain)

Geforce GTX 690		58560 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 46720 (395%)

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 data (measured in megabytes per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total amount of texture units by the core clock 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.