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GeForce GT 340 1GB vs Radeon HD 3850 256MB

Intro

The GeForce GT 340 1GB features a GPU core clock speed of 550 MHz, and the 1024 MB of GDDR5 RAM runs at 850 MHz through a 128-bit bus. It also is made up of 96 SPUs, 32 Texture Address Units, and 8 ROPs.

Compare all that to the Radeon HD 3850 256MB, which has a clock speed of 668 MHz and a GDDR3 memory frequency of 828 MHz. It also makes use of a 256-bit memory bus, and makes use of a 55 nm design. It features 320(64x5) SPUs, 16 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB 69 Watts
Radeon HD 3850 256MB 75 Watts
Difference: 6 Watts (9%)

Memory Bandwidth

Performance-wise, the GeForce GT 340 1GB should theoretically be a little bit superior to the Radeon HD 3850 256MB in general. (explain)

GeForce GT 340 1GB 54400 MB/sec
Radeon HD 3850 256MB 52992 MB/sec
Difference: 1408 (3%)

Texel Rate

The GeForce GT 340 1GB will be much (approximately 65%) more effective at anisotropic filtering than the Radeon HD 3850 256MB. (explain)

GeForce GT 340 1GB 17600 Mtexels/sec
Radeon HD 3850 256MB 10688 Mtexels/sec
Difference: 6912 (65%)

Pixel Rate

The Radeon HD 3850 256MB will be much (more or less 143%) more effective at AA than the GeForce GT 340 1GB, and will be able to handle higher resolutions while still performing well. (explain)

Radeon HD 3850 256MB 10688 Mpixels/sec
GeForce GT 340 1GB 4400 Mpixels/sec
Difference: 6288 (143%)

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 1GB

Amazon.com

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Radeon HD 3850 256MB

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 1GB Radeon HD 3850 256MB
Manufacturer nVidia AMD
Year February 2010 Nov 19, 2007
Code Name GT215 RV670 PRO
Memory 1024 MB 256 MB
Core Speed 550 MHz 668 MHz
Memory Speed 3400 MHz 1656 MHz
Power (Max TDP) 69 watts 75 watts
Bandwidth 54400 MB/sec 52992 MB/sec
Texel Rate 17600 Mtexels/sec 10688 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 10688 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 max amount of data (in units of MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video 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 maximum amount of pixels the video card could possibly record to its 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 the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce GT 340 1GB

Amazon.com

Check prices at:

Radeon HD 3850 256MB

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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