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GeForce GT 340 1GB vs Radeon HD 4850 X2 1GB

Intro

The GeForce GT 340 1GB makes use of a 40 nm design. nVidia has set the core speed at 550 MHz. The GDDR5 memory is set to run at a frequency of 850 MHz on this particular model. It features 96 SPUs along with 32 TAUs and 8 Rasterization Operator Units.

Compare all that to the Radeon HD 4850 X2 1GB, which uses a 55 nm design. AMD has set the core speed at 625 MHz. The GDDR3 RAM runs at a speed of 993 MHz on this model. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB 69 Watts
Radeon HD 4850 X2 1GB 250 Watts
Difference: 181 Watts (262%)

Memory Bandwidth

Performance-wise, the Radeon HD 4850 X2 1GB should theoretically be quite a bit better than the GeForce GT 340 1GB overall. (explain)

Radeon HD 4850 X2 1GB 127104 MB/sec
GeForce GT 340 1GB 54400 MB/sec
Difference: 72704 (134%)

Texel Rate

The Radeon HD 4850 X2 1GB should be quite a bit (more or less 184%) more effective at texture filtering than the GeForce GT 340 1GB. (explain)

Radeon HD 4850 X2 1GB 50000 Mtexels/sec
GeForce GT 340 1GB 17600 Mtexels/sec
Difference: 32400 (184%)

Pixel Rate

The Radeon HD 4850 X2 1GB should be much (more or less 355%) better at anti-aliasing than the GeForce GT 340 1GB, and capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 4850 X2 1GB 20000 Mpixels/sec
GeForce GT 340 1GB 4400 Mpixels/sec
Difference: 15600 (355%)

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 4850 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 4850 X2 1GB
Manufacturer nVidia AMD
Year February 2010 Nov 7, 2008
Code Name GT215 R700
Memory 1024 MB 1024 MB (x2)
Core Speed 550 MHz 625 MHz (x2)
Memory Speed 3400 MHz 1986 MHz (x2)
Power (Max TDP) 69 watts 250 watts
Bandwidth 54400 MB/sec 127104 MB/sec
Texel Rate 17600 Mtexels/sec 50000 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 20000 Mpixels/sec
Unified Shaders 96 800(160x5) (x2)
Texture Mapping Units 32 40 (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 956 million
Bus PCIe x16 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.3 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 number of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce GT 340 1GB

Amazon.com

Check prices at:

Radeon HD 4850 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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