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GeForce GT 340 1GB vs Radeon HD 3870 X2 1GB

Intro

The GeForce GT 340 1GB comes with core clock speeds of 550 MHz on the GPU, and 850 MHz on the 1024 MB of GDDR5 RAM. It features 96 SPUs along with 32 TAUs and 8 Rasterization Operator Units.

Compare all 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 makes use of a 55 nm design. It features 320(64x5) SPUs, 16 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 3870 X2 1GB should be much faster than the GeForce GT 340 1GB overall. (explain)

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

Texel Rate

The Radeon HD 3870 X2 1GB will be a lot (more or less 50%) more effective at AF than the GeForce GT 340 1GB. (explain)

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

Pixel Rate

The Radeon HD 3870 X2 1GB will be much (about 500%) more effective at FSAA than the GeForce GT 340 1GB, and will be able to handle higher screen resolutions better. (explain)

Radeon HD 3870 X2 1GB 26400 Mpixels/sec
GeForce GT 340 1GB 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 1GB

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 1GB Radeon HD 3870 X2 1GB
Manufacturer nVidia AMD
Year February 2010 Jan 28, 2008
Code Name GT215 R680
Memory 1024 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: Bandwidth is the largest amount of information (counted in MB per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock 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 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 max fill rate.

Display Prices

Hide Prices

GeForce GT 340 1GB

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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