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GeForce GTX 660 Ti vs Radeon HD 5870

Intro

The GeForce GTX 660 Ti has a GPU clock speed of 915 MHz, and the 2048 MB of GDDR5 memory is set to run at 1500 MHz through a 192-bit bus. It also is comprised of 1344 Stream Processors, 112 TAUs, and 24 ROPs.

Compare those specs to the Radeon HD 5870, which features a core clock speed of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also makes use of a 256-bit bus, and uses a 40 nm design. It features 1600(320x5) SPUs, 80 Texture Address Units, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti 150 Watts
Radeon HD 5870 188 Watts
Difference: 38 Watts (25%)

Memory Bandwidth

The Radeon HD 5870, in theory, should be a small bit faster than the GeForce GTX 660 Ti overall. (explain)

Radeon HD 5870 153600 MB/sec
GeForce GTX 660 Ti 144000 MB/sec
Difference: 9600 (7%)

Texel Rate

The GeForce GTX 660 Ti should be quite a bit (approximately 51%) better at anisotropic filtering than the Radeon HD 5870. (explain)

GeForce GTX 660 Ti 102480 Mtexels/sec
Radeon HD 5870 68000 Mtexels/sec
Difference: 34480 (51%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 5870 is the winner, by a large margin. (explain)

Radeon HD 5870 27200 Mpixels/sec
GeForce GTX 660 Ti 21960 Mpixels/sec
Difference: 5240 (24%)

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

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GeForce GTX 660 Ti

Amazon.com

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Radeon HD 5870

Amazon.com

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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GTX 660 Ti Radeon HD 5870
Manufacturer nVidia AMD
Year August 2012 September 23, 2009
Code Name GK104 Cypress XT
Memory 2048 MB 1024 MB
Core Speed 915 MHz 850 MHz
Memory Speed 6000 MHz 4800 MHz
Power (Max TDP) 150 watts 188 watts
Bandwidth 144000 MB/sec 153600 MB/sec
Texel Rate 102480 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 21960 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 1344 1600(320x5)
Texture Mapping Units 112 80
Render Output Units 24 32
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
Fab Process 28 nm 40 nm
Transistors 3540 million 2154 million
Bus PCIe 3.0 x16 PCIe 2.1 x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.3 OpenGL 3.2

Memory Bandwidth: Memory 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. It's calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs 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 - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GTX 660 Ti

Amazon.com

Check prices at:

Radeon HD 5870

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Comments

3 Responses to “GeForce GTX 660 Ti vs Radeon HD 5870”
nyiko says:

rodeon wins,,,its a monster and the graphics are good

larsV12 says:

@nyiko .. it does, and like so many of ATi cards of recent years, they're still able to compete against - and often better - the far newer tech' from NVIDIA of a the same / similar price bracket.

pikkart says:

Just swapped my Sapphire 5870 for an Asus GTX 660 Ti to play Ark. Huge difference in terms of framerate.

5870: ran at 1280x1024 with everything on low to get 15-20 fps.

660 Ti: running 1600x1200, with most settings at medium or high, and I get a comfy 30+ fps.

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