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GeForce GT 340 vs Radeon HD 4830 1GB

Intro

The GeForce GT 340 makes use of a 40 nm design. nVidia has clocked the core frequency at 550 MHz. The GDDR5 RAM 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 those specifications to the Radeon HD 4830 1GB, which uses a 55 nm design. AMD has clocked the core speed at 575 MHz. The GDDR4 RAM works at a speed of 900 MHz on this model. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 69 Watts
Radeon HD 4830 1GB 95 Watts
Difference: 26 Watts (38%)

Memory Bandwidth

The Radeon HD 4830 1GB should in theory perform a bit faster than the GeForce GT 340 overall. (explain)

Radeon HD 4830 1GB 57600 MB/sec
GeForce GT 340 54400 MB/sec
Difference: 3200 (6%)

Texel Rate

The Radeon HD 4830 1GB will be a bit (more or less 5%) faster with regards to texture filtering than the GeForce GT 340. (explain)

Radeon HD 4830 1GB 18400 Mtexels/sec
GeForce GT 340 17600 Mtexels/sec
Difference: 800 (5%)

Pixel Rate

The Radeon HD 4830 1GB will be much (approximately 109%) faster with regards to AA than the GeForce GT 340, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 4830 1GB 9200 Mpixels/sec
GeForce GT 340 4400 Mpixels/sec
Difference: 4800 (109%)

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 4830 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 4830 1GB
Manufacturer nVidia AMD
Year February 2010 Oct 21, 2008
Code Name GT215 RV770 LE
Memory 512 MB 1024 MB
Core Speed 550 MHz 575 MHz
Memory Speed 3400 MHz 1800 MHz
Power (Max TDP) 69 watts 95 watts
Bandwidth 54400 MB/sec 57600 MB/sec
Texel Rate 17600 Mtexels/sec 18400 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 96 640(128x5)
Texture Mapping Units 32 32
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: Memory bandwidth is the max amount of information (in units of MB per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could 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 Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce GT 340

Amazon.com

Check prices at:

Radeon HD 4830 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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