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GeForce GT 340 vs Radeon HD 4850 1GB

Intro

The GeForce GT 340 makes use of a 40 nm design. nVidia has set the core speed at 550 MHz. The GDDR5 memory runs at a frequency of 850 MHz on this model. It features 96 SPUs along with 32 TAUs and 8 ROPs.

Compare that to the Radeon HD 4850 1GB, which uses a 55 nm design. AMD has clocked the core frequency at 625 MHz. The GDDR4 RAM is set to run at a frequency of 993 MHz on this card. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 69 Watts
Radeon HD 4850 1GB 110 Watts
Difference: 41 Watts (59%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4850 1GB should theoretically be a small bit superior to the GeForce GT 340 overall. (explain)

Radeon HD 4850 1GB 63552 MB/sec
GeForce GT 340 54400 MB/sec
Difference: 9152 (17%)

Texel Rate

The Radeon HD 4850 1GB will be quite a bit (about 42%) more effective at texture filtering than the GeForce GT 340. (explain)

Radeon HD 4850 1GB 25000 Mtexels/sec
GeForce GT 340 17600 Mtexels/sec
Difference: 7400 (42%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 4850 1GB is superior to the GeForce GT 340, by far. (explain)

Radeon HD 4850 1GB 10000 Mpixels/sec
GeForce GT 340 4400 Mpixels/sec
Difference: 5600 (127%)

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 4850 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 4850 1GB
Manufacturer nVidia AMD
Year February 2010 Jun 25, 2008
Code Name GT215 RV770 PRO
Memory 512 MB 1024 MB
Core Speed 550 MHz 625 MHz
Memory Speed 3400 MHz 1986 MHz
Power (Max TDP) 69 watts 110 watts
Bandwidth 54400 MB/sec 63552 MB/sec
Texel Rate 17600 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 96 800(160x5)
Texture Mapping Units 32 40
Render Output Units 8 16
Bus Type GDDR5 GDDR4
Bus Width 128-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 727 million 956 million
Bus PCIe x16 PCIe 2.0 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 (counted in megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. 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 amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce GT 340

Amazon.com

Check prices at:

Radeon HD 4850 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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