Geforce GTX 670 vs Radeon HD 6870

Intro

Compare those specs to the Radeon HD 6870, which comes with clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 1120 SPUs as well as 56 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 670		7351 points
Radeon HD 6870		2870 points
	Difference: 4481 (156%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6870		151 Watts
Geforce GTX 670		170 Watts
	Difference: 19 Watts (13%)

Memory Bandwidth

The Geforce GTX 670 should in theory be much faster than the Radeon HD 6870 overall. (explain)

Geforce GTX 670		192000 MB/sec
Radeon HD 6870		134400 MB/sec
	Difference: 57600 (43%)

Texel Rate

The Geforce GTX 670 will be a lot (more or less 103%) faster with regards to texture filtering than the Radeon HD 6870. (explain)

Geforce GTX 670		102480 Mtexels/sec
Radeon HD 6870		50400 Mtexels/sec
	Difference: 52080 (103%)

Pixel Rate

The Geforce GTX 670 should be a little bit (more or less 2%) better at AA than the Radeon HD 6870, and also able to handle higher screen resolutions while still performing well. (explain)

Geforce GTX 670		29280 Mpixels/sec
Radeon HD 6870		28800 Mpixels/sec
	Difference: 480 (2%)

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.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. 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 amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at 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 the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.