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GeForce GT 340 vs Radeon HD 3850 X2

Intro

The GeForce GT 340 has a GPU core speed of 550 MHz, and the 512 MB of GDDR5 memory is set to run at 850 MHz through a 128-bit bus. It also is comprised of 96 SPUs, 32 Texture Address Units, and 8 ROPs.

Compare that to the Radeon HD 3850 X2, which uses a 55 nm design. AMD has set the core speed at 668 MHz. The GDDR3 RAM runs at a speed of 828 MHz on this card. It features 320(64x5) SPUs along with 16 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 3850 X2 should in theory be much faster than the GeForce GT 340 in general. (explain)

Radeon HD 3850 X2 105984 MB/sec
GeForce GT 340 54400 MB/sec
Difference: 51584 (95%)

Texel Rate

The Radeon HD 3850 X2 is much (more or less 21%) better at AF than the GeForce GT 340. (explain)

Radeon HD 3850 X2 21376 Mtexels/sec
GeForce GT 340 17600 Mtexels/sec
Difference: 3776 (21%)

Pixel Rate

The Radeon HD 3850 X2 is much (approximately 386%) faster with regards to anti-aliasing than the GeForce GT 340, and also will be able to handle higher resolutions better. (explain)

Radeon HD 3850 X2 21376 Mpixels/sec
GeForce GT 340 4400 Mpixels/sec
Difference: 16976 (386%)

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 3850 X2

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 3850 X2
Manufacturer nVidia AMD
Year February 2010 Apr 4, 2008
Code Name GT215 RV670 PRO
Memory 512 MB 512 MB (x2)
Core Speed 550 MHz 668 MHz (x2)
Memory Speed 3400 MHz 1656 MHz (x2)
Power (Max TDP) 69 watts (Unknown) watts
Bandwidth 54400 MB/sec 105984 MB/sec
Texel Rate 17600 Mtexels/sec 21376 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 21376 Mpixels/sec
Unified Shaders 96 320(64x5) (x2)
Texture Mapping Units 32 16 (x2)
Render Output Units 8 16 (x2)
Bus Type GDDR5 GDDR3
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: Bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. 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 number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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

Display Prices

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GeForce GT 340

Amazon.com

Check prices at:

Radeon HD 3850 X2

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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