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GeForce GTX 465 vs Radeon HD 3870 X2 1GB

Intro

The GeForce GTX 465 features a clock frequency of 607 MHz and a GDDR5 memory frequency of 802 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It is comprised of 352 SPUs, 44 TAUs, and 32 Raster Operation Units.

Compare that to the Radeon HD 3870 X2 1GB, which comes with GPU core speed of 825 MHz, and 1024 MB of GDDR4 RAM running at 1126 MHz through a 256-bit bus. It also features 320(64x5) Stream Processors, 16 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 3870 X2 1GB should in theory be much better than the GeForce GTX 465 in general. (explain)

Radeon HD 3870 X2 1GB 144128 MB/sec
GeForce GTX 465 102592 MB/sec
Difference: 41536 (40%)

Texel Rate

The GeForce GTX 465 is a little bit (about 1%) faster with regards to anisotropic filtering than the Radeon HD 3870 X2 1GB. (explain)

GeForce GTX 465 26708 Mtexels/sec
Radeon HD 3870 X2 1GB 26400 Mtexels/sec
Difference: 308 (1%)

Pixel Rate

The Radeon HD 3870 X2 1GB is quite a bit (more or less 36%) better at FSAA than the GeForce GTX 465, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 3870 X2 1GB 26400 Mpixels/sec
GeForce GTX 465 19424 Mpixels/sec
Difference: 6976 (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.

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 465

Amazon.com

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Radeon HD 3870 X2 1GB

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 465 Radeon HD 3870 X2 1GB
Manufacturer nVidia AMD
Year May 2010 Jan 28, 2008
Code Name GF100 R680
Memory 1024 MB 1024 MB (x2)
Core Speed 607 MHz 825 MHz (x2)
Memory Speed 3208 MHz 2252 MHz (x2)
Power (Max TDP) 200 watts (Unknown) watts
Bandwidth 102592 MB/sec 144128 MB/sec
Texel Rate 26708 Mtexels/sec 26400 Mtexels/sec
Pixel Rate 19424 Mpixels/sec 26400 Mpixels/sec
Unified Shaders 352 320(64x5) (x2)
Texture Mapping Units 44 16 (x2)
Render Output Units 32 16 (x2)
Bus Type GDDR5 GDDR4
Bus Width 256-bit 256-bit (x2)
Fab Process 40 nm 55 nm
Transistors 3000 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 data (measured in MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

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

Display Prices

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GeForce GTX 465

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.

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