GeForce GTX 660 Ti vs Radeon HD 6870

Intro

Compare all that to the Radeon HD 6870, which has a GPU core clock speed of 900 MHz, and 1024 MB of GDDR5 RAM set to run at 1050 MHz through a 256-bit bus. It also features 1120 Stream Processors, 56 TAUs, 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 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

In theory, the GeForce GTX 660 Ti will be 7% faster than the Radeon HD 6870 overall, because of its higher bandwidth. (explain)

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

Texel Rate

The GeForce GTX 660 Ti is a lot (more or less 103%) more effective at anisotropic 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 should be a lot (about 31%) faster with regards to full screen anti-aliasing than the GeForce GTX 660 Ti, and capable of handling higher resolutions better. (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 maximum amount of data (measured in MB per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 number of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the video 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 card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.