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GeForce GTX 460 vs Radeon HD 3870 X2 1GB

Intro

The GeForce GTX 460 uses a 40 nm design. nVidia has set the core speed at 675 MHz. The GDDR5 RAM is set to run at a speed of 900 MHz on this model. It features 336 SPUs along with 56 TAUs and 24 Rasterization Operator Units.

Compare all that to the Radeon HD 3870 X2 1GB, which comes with clock speeds of 825 MHz on the GPU, and 1126 MHz on the 1024 MB of GDDR4 RAM. It features 320(64x5) SPUs along with 16 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 3870 X2 1GB should in theory be quite a bit superior to the GeForce GTX 460 overall. (explain)

Radeon HD 3870 X2 1GB 144128 MB/sec
GeForce GTX 460 86400 MB/sec
Difference: 57728 (67%)

Texel Rate

The GeForce GTX 460 will be much (more or less 43%) faster with regards to anisotropic filtering than the Radeon HD 3870 X2 1GB. (explain)

GeForce GTX 460 37800 Mtexels/sec
Radeon HD 3870 X2 1GB 26400 Mtexels/sec
Difference: 11400 (43%)

Pixel Rate

The Radeon HD 3870 X2 1GB is a lot (about 63%) better at full screen anti-aliasing than the GeForce GTX 460, and also should be able to handle higher resolutions better. (explain)

Radeon HD 3870 X2 1GB 26400 Mpixels/sec
GeForce GTX 460 16200 Mpixels/sec
Difference: 10200 (63%)

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

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GeForce GTX 460

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

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Model GeForce GTX 460 Radeon HD 3870 X2 1GB
Manufacturer nVidia AMD
Year July 2010 Jan 28, 2008
Code Name GF104 R680
Memory 768 MB 1024 MB (x2)
Core Speed 675 MHz 825 MHz (x2)
Memory Speed 3600 MHz 2252 MHz (x2)
Power (Max TDP) 150 watts (Unknown) watts
Bandwidth 86400 MB/sec 144128 MB/sec
Texel Rate 37800 Mtexels/sec 26400 Mtexels/sec
Pixel Rate 16200 Mpixels/sec 26400 Mpixels/sec
Unified Shaders 336 320(64x5) (x2)
Texture Mapping Units 56 16 (x2)
Render Output Units 24 16 (x2)
Bus Type GDDR5 GDDR4
Bus Width 192-bit 256-bit (x2)
Fab Process 40 nm 55 nm
Transistors 1950 million (Unknown) million
Bus PCIe x16 PCIe 2.0 x16/(internal PCIe 1.1 x16)
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of information (measured in MB per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 460

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

One Response to “GeForce GTX 460 vs Radeon HD 3870 X2 1GB”
gtx 460 vs radeon 3879x2 says:

[...] one i want to get. I was checking the graphs and it seems that the cards are not that different. http://www.hwcompare.com/8123/geforc...d-3870-x2-1gb/ So is the 460 much of an upgrade over the 3870x2? And is it worth me spending $200 bucks plus on [...]

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