Submit Benchmarks!

Submit SSD Benchmark
Submit GPU Benchmark

Compare any two graphics cards:
VS

GeForce GTX 660 vs Radeon HD 3870 X2 1GB

Intro

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

Compare all of that to the Radeon HD 3870 X2 1GB, which features a core clock frequency of 825 MHz and a GDDR4 memory frequency of 1126 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It is made up of 320(64x5) SPUs, 16 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 660, in theory, should be just a bit faster than the Radeon HD 3870 X2 1GB in general. (explain)

GeForce GTX 660 144192 MB/sec
Radeon HD 3870 X2 1GB 144128 MB/sec
Difference: 64 (0%)

Texel Rate

The GeForce GTX 660 is a lot (approximately 197%) better at anisotropic filtering than the Radeon HD 3870 X2 1GB. (explain)

GeForce GTX 660 78400 Mtexels/sec
Radeon HD 3870 X2 1GB 26400 Mtexels/sec
Difference: 52000 (197%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 3870 X2 1GB is superior to the GeForce GTX 660, though not by far. (explain)

Radeon HD 3870 X2 1GB 26400 Mpixels/sec
GeForce GTX 660 23520 Mpixels/sec
Difference: 2880 (12%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Display Prices

Hide Prices

GeForce GTX 660

Amazon.com

Check prices at:

Radeon HD 3870 X2 1GB

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.

Specifications

Display Specifications

Hide Specifications

Model GeForce GTX 660 Radeon HD 3870 X2 1GB
Manufacturer nVidia AMD
Year September 2012 Jan 28, 2008
Code Name GK106 R680
Memory 2048 MB 1024 MB (x2)
Core Speed 980 MHz 825 MHz (x2)
Memory Speed 6008 MHz 2252 MHz (x2)
Power (Max TDP) 140 watts (Unknown) watts
Bandwidth 144192 MB/sec 144128 MB/sec
Texel Rate 78400 Mtexels/sec 26400 Mtexels/sec
Pixel Rate 23520 Mpixels/sec 26400 Mpixels/sec
Unified Shaders 960 320(64x5) (x2)
Texture Mapping Units 80 16 (x2)
Render Output Units 24 16 (x2)
Bus Type GDDR5 GDDR4
Bus Width 192-bit 256-bit (x2)
Fab Process 28 nm 55 nm
Transistors 2540 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 2.0 x16/(internal PCIe 1.1 x16)
DirectX Version DirectX 11.0 DirectX 10.1
OpenGL Version OpenGL 4.3 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of data (in units of megabytes per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is calculated by multiplying the total texture units by the core 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 applied per second.

Pixel Rate: Pixel rate is the maximum amount 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 number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 660

Amazon.com

Check prices at:

Radeon HD 3870 X2 1GB

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

Be the first to leave a comment!

Your email address will not be published. Required fields are marked *


*

WordPress Anti-Spam by WP-SpamShield