GeForce GTX 275 vs Geforce GTX 690

Intro

Compare all that to the Geforce GTX 690, which has a core clock frequency of 915 MHz and a GDDR5 memory speed of 1502 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It features 1536 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 275		219 Watts
Geforce GTX 690		300 Watts
	Difference: 81 Watts (37%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 690 will be 203% quicker than the GeForce GTX 275 in general, due to its higher data rate. (explain)

Geforce GTX 690		384512 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 257504 (203%)

Texel Rate

The Geforce GTX 690 will be a lot (more or less 363%) faster with regards to texture filtering than the GeForce GTX 275. (explain)

Geforce GTX 690		234240 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 183600 (363%)

Pixel Rate

The Geforce GTX 690 should be a lot (approximately 230%) better at FSAA than the GeForce GTX 275, and also should be capable of handling higher screen resolutions more effectively. (explain)

Geforce GTX 690		58560 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 40836 (230%)

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 transferred past the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the card will be at handling 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 graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs 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 rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.