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GeForce GT 340 vs Radeon HD 3870 X2 1GB

Intro

The GeForce GT 340 comes with core speeds of 550 MHz on the GPU, and 850 MHz on the 512 MB of GDDR5 memory. It features 96 SPUs along with 32 Texture Address Units and 8 Rasterization Operator Units.

Compare that to the Radeon HD 3870 X2 1GB, which features a clock frequency of 825 MHz and a GDDR4 memory speed of 1126 MHz. It also uses a 256-bit memory bus, and uses a 55 nm design. It is comprised of 320(64x5) SPUs, 16 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 3870 X2 1GB should perform much faster than the GeForce GT 340 overall. (explain)

Radeon HD 3870 X2 1GB 144128 MB/sec
GeForce GT 340 54400 MB/sec
Difference: 89728 (165%)

Texel Rate

The Radeon HD 3870 X2 1GB will be a lot (about 50%) faster with regards to AF than the GeForce GT 340. (explain)

Radeon HD 3870 X2 1GB 26400 Mtexels/sec
GeForce GT 340 17600 Mtexels/sec
Difference: 8800 (50%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 3870 X2 1GB is superior to the GeForce GT 340, by a large margin. (explain)

Radeon HD 3870 X2 1GB 26400 Mpixels/sec
GeForce GT 340 4400 Mpixels/sec
Difference: 22000 (500%)

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 GT 340

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 GT 340 Radeon HD 3870 X2 1GB
Manufacturer nVidia AMD
Year February 2010 Jan 28, 2008
Code Name GT215 R680
Memory 512 MB 1024 MB (x2)
Core Speed 550 MHz 825 MHz (x2)
Memory Speed 3400 MHz 2252 MHz (x2)
Power (Max TDP) 69 watts (Unknown) watts
Bandwidth 54400 MB/sec 144128 MB/sec
Texel Rate 17600 Mtexels/sec 26400 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 26400 Mpixels/sec
Unified Shaders 96 320(64x5) (x2)
Texture Mapping Units 32 16 (x2)
Render Output Units 8 16 (x2)
Bus Type GDDR5 GDDR4
Bus Width 128-bit 256-bit (x2)
Fab Process 40 nm 55 nm
Transistors 727 million (Unknown) million
Bus PCIe x16 PCIe 2.0 x16/(internal PCIe 1.1 x16)
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.3 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

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

Display Prices

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GeForce GT 340

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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