GeForce GTX 660 Ti vs Radeon HD 6870

Intro

Compare that to the Radeon HD 6870, which has a core clock speed of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It is comprised of 1120 SPUs, 56 TAUs, and 32 Raster Operation Units.

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 660 Ti		6013 points
Radeon HD 6870		2870 points
	Difference: 3143 (110%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti		150 Watts
Radeon HD 6870		151 Watts
	Difference: 1 Watts (1%)

Memory Bandwidth

The GeForce GTX 660 Ti, in theory, should perform a small bit faster than the Radeon HD 6870 overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
Radeon HD 6870		134400 MB/sec
	Difference: 9600 (7%)

Texel Rate

The GeForce GTX 660 Ti will be quite a bit (more or less 103%) more effective at texture filtering than the Radeon HD 6870. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon HD 6870		50400 Mtexels/sec
	Difference: 52080 (103%)

Pixel Rate

The Radeon HD 6870 will be quite a bit (more or less 31%) more effective at FSAA than the GeForce GTX 660 Ti, and also should be able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 6870		28800 Mpixels/sec
GeForce GTX 660 Ti		21960 Mpixels/sec
	Difference: 6840 (31%)

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 max amount of data (measured in MB per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.