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GeForce GT 340 vs Radeon HD 3870 512MB

Intro

The GeForce GT 340 uses a 40 nm design. nVidia has set the core frequency at 550 MHz. The GDDR5 RAM works at a speed of 850 MHz on this specific card. It features 96 SPUs as well as 32 TAUs and 8 ROPs.

Compare those specs to the Radeon HD 3870 512MB, which features core clock speeds of 775 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 memory. It features 320(64x5) SPUs as well as 16 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 69 Watts
Radeon HD 3870 512MB 106 Watts
Difference: 37 Watts (54%)

Memory Bandwidth

In theory, the Radeon HD 3870 512MB should perform a bit faster than the GeForce GT 340 in general. (explain)

Radeon HD 3870 512MB 57600 MB/sec
GeForce GT 340 54400 MB/sec
Difference: 3200 (6%)

Texel Rate

The GeForce GT 340 should be much (approximately 42%) faster with regards to texture filtering than the Radeon HD 3870 512MB. (explain)

GeForce GT 340 17600 Mtexels/sec
Radeon HD 3870 512MB 12400 Mtexels/sec
Difference: 5200 (42%)

Pixel Rate

The Radeon HD 3870 512MB will be quite a bit (more or less 182%) faster with regards to anti-aliasing than the GeForce GT 340, and capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 3870 512MB 12400 Mpixels/sec
GeForce GT 340 4400 Mpixels/sec
Difference: 8000 (182%)

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.

Price Comparison

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GeForce GT 340

Amazon.com

Check prices at:

Radeon HD 3870 512MB

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 512MB
Manufacturer nVidia AMD
Year February 2010 Nov 19, 2007
Code Name GT215 RV670 XT
Memory 512 MB 512 MB
Core Speed 550 MHz 775 MHz
Memory Speed 3400 MHz 1800 MHz
Power (Max TDP) 69 watts 106 watts
Bandwidth 54400 MB/sec 57600 MB/sec
Texel Rate 17600 Mtexels/sec 12400 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 12400 Mpixels/sec
Unified Shaders 96 320(64x5)
Texture Mapping Units 32 16
Render Output Units 8 16
Bus Type GDDR5 GDDR3
Bus Width 128-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 727 million (Unknown) million
Bus PCIe x16 PCIe 2.0 x16/AGP 8x
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.3 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it must 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 AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 chip could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the clock 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 rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GT 340

Amazon.com

Check prices at:

Radeon HD 3870 512MB

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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