Geforce GTX 690 vs Radeon HD 7870 XT

Intro

Compare those specs to the Radeon HD 7870 XT, which features a GPU core clock speed of 925 MHz, and 2048 MB of GDDR5 RAM set to run at 1500 MHz through a 256-bit bus. It also is comprised of 1536 Stream Processors, 96 Texture Address Units, and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Geforce GTX 690		13111 points
Radeon HD 7870 XT		6390 points
	Difference: 6721 (105%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 XT		185 Watts
Geforce GTX 690		300 Watts
	Difference: 115 Watts (62%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 690 should in theory be a lot better than the Radeon HD 7870 XT overall. (explain)

Geforce GTX 690		384512 MB/sec
Radeon HD 7870 XT		192000 MB/sec
	Difference: 192512 (100%)

Texel Rate

The Geforce GTX 690 is much (about 164%) more effective at anisotropic filtering than the Radeon HD 7870 XT. (explain)

Geforce GTX 690		234240 Mtexels/sec
Radeon HD 7870 XT		88800 Mtexels/sec
	Difference: 145440 (164%)

Pixel Rate

The Geforce GTX 690 should be quite a bit (approximately 98%) more effective at FSAA than the Radeon HD 7870 XT, and able to handle higher screen resolutions more effectively. (explain)

Geforce GTX 690		58560 Mpixels/sec
Radeon HD 7870 XT		29600 Mpixels/sec
	Difference: 28960 (98%)

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 (in units of MB per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units by the core speed of the chip. The better this number, the better the video 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 graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.