Join Us On Facebook

Compare any two graphics cards:
VS

GeForce GTX 660 vs Radeon HD 7870

Intro

The GeForce GTX 660 comes with clock speeds of 980 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 memory. It features 960 SPUs along with 80 Texture Address Units and 24 Rasterization Operator Units.

Compare all of that to the Radeon HD 7870, which has a clock frequency of 1000 MHz and a GDDR5 memory frequency of 1200 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It is comprised of 1280 SPUs, 80 Texture Address Units, and 32 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
Radeon HD 7870 175 Watts
Difference: 35 Watts (25%)

Memory Bandwidth

The Radeon HD 7870 should theoretically perform a little bit faster than the GeForce GTX 660 in general. (explain)

Radeon HD 7870 153600 MB/sec
GeForce GTX 660 144192 MB/sec
Difference: 9408 (7%)

Texel Rate

The Radeon HD 7870 is a little bit (approximately 2%) faster with regards to texture filtering than the GeForce GTX 660. (explain)

Radeon HD 7870 80000 Mtexels/sec
GeForce GTX 660 78400 Mtexels/sec
Difference: 1600 (2%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7870 is a better choice, by far. (explain)

Radeon HD 7870 32000 Mpixels/sec
GeForce GTX 660 23520 Mpixels/sec
Difference: 8480 (36%)

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

GeForce GTX 660

Amazon.com

Radeon HD 7870

Amazon.com

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

Model GeForce GTX 660 Radeon HD 7870
Manufacturer nVidia AMD
Year September 2012 March 2012
Code Name GK106 Pitcairn XT
Fab Process 28 nm 28 nm
Bus PCIe 3.0 x16 PCIe 3.0 x16
Memory 2048 MB 2048 MB
Core Speed 980 MHz 1000 MHz
Shader Speed 980 MHz (N/A) MHz
Memory Speed 1502 MHz (6008 MHz effective) 1200 MHz (4800 MHz effective)
Unified Shaders 960 1280
Texture Mapping Units 80 80
Render Output Units 24 32
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.3 OpenGL 4.2
Power (Max TDP) 140 watts 175 watts
Shader Model 5.0 5.0
Bandwidth 144192 MB/sec 153600 MB/sec
Texel Rate 78400 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 23520 Mpixels/sec 32000 Mpixels/sec

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Comments

2 Responses to “GeForce GTX 660 vs Radeon HD 7870”
[...] von AMD. Preislich auch um die 200€. Wenn du einen Vergleich deiner 660 und der 7870 möchtest Vergleich 660 mit 7870 Hierbei muss jedoch beachtet werden, das dieser Vergleich nur auf den reinen Daten basiert. [...]
LEEROY says:
HD 7870 is fair bit faster on paper, but the difference is greater in real world applications. Depending on the price (near enough identical in Australia, as of March 2013), go the HD7870. GTX660 is crippled by its memory bandwidth :c

Your email address will not be published.


You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

Spam Protection by WP-SpamFree