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GeForce GT 340 vs Radeon HD 7850

Intro

The GeForce GT 340 uses a 40 nm design. nVidia has set the core speed at 550 MHz. The GDDR5 RAM is set to run at a speed of 850 MHz on this model. It features 96 SPUs as well as 32 Texture Address Units and 8 ROPs.

Compare those specifications to the Radeon HD 7850, which uses a 28 nm design. AMD has clocked the core frequency at 860 MHz. The GDDR5 memory runs at a speed of 1200 MHz on this card. It features 1024 SPUs as well as 64 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 69 Watts
Radeon HD 7850 130 Watts
Difference: 61 Watts (88%)

Memory Bandwidth

In theory, the Radeon HD 7850 should be 182% faster than the GeForce GT 340 overall, due to its greater bandwidth. (explain)

Radeon HD 7850 153600 MB/sec
GeForce GT 340 54400 MB/sec
Difference: 99200 (182%)

Texel Rate

The Radeon HD 7850 should be much (approximately 213%) faster with regards to anisotropic filtering than the GeForce GT 340. (explain)

Radeon HD 7850 55040 Mtexels/sec
GeForce GT 340 17600 Mtexels/sec
Difference: 37440 (213%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7850 is superior to the GeForce GT 340, by far. (explain)

Radeon HD 7850 27520 Mpixels/sec
GeForce GT 340 4400 Mpixels/sec
Difference: 23120 (525%)

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

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Radeon HD 7850

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 GT 340 Radeon HD 7850
Manufacturer nVidia AMD
Year February 2010 March 2012
Code Name GT215 Pitcairn Pro
Memory 512 MB 2048 MB
Core Speed 550 MHz 860 MHz
Memory Speed 3400 MHz 4800 MHz
Power (Max TDP) 69 watts 130 watts
Bandwidth 54400 MB/sec 153600 MB/sec
Texel Rate 17600 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 96 1024
Texture Mapping Units 32 64
Render Output Units 8 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 727 million 2800 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.1
OpenGL Version OpenGL 3.3 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 again. If 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 high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GT 340

Amazon.com

Check prices at:

Radeon HD 7850

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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