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GeForce 9800 GT 512MB vs GeForce GT 340

Intro

The GeForce 9800 GT 512MB features a core clock speed of 600 MHz and a GDDR3 memory speed of 900 MHz. It also makes use of a 256-bit memory bus, and uses a 65/55 nm design. It is comprised of 112 SPUs, 56 TAUs, and 16 Raster Operation Units.

Compare that to the GeForce GT 340, which makes use of a 40 nm design. nVidia has set the core speed at 550 MHz. The GDDR5 RAM runs at a speed of 850 MHz on this card. It features 96 SPUs along with 32 TAUs and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 69 Watts
GeForce 9800 GT 512MB 105 Watts
Difference: 36 Watts (52%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GT 512MB should in theory be a small bit better than the GeForce GT 340 overall. (explain)

GeForce 9800 GT 512MB 57600 MB/sec
GeForce GT 340 54400 MB/sec
Difference: 3200 (6%)

Texel Rate

The GeForce 9800 GT 512MB should be much (about 91%) faster with regards to texture filtering than the GeForce GT 340. (explain)

GeForce 9800 GT 512MB 33600 Mtexels/sec
GeForce GT 340 17600 Mtexels/sec
Difference: 16000 (91%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce 9800 GT 512MB is a better choice, by far. (explain)

GeForce 9800 GT 512MB 9600 Mpixels/sec
GeForce GT 340 4400 Mpixels/sec
Difference: 5200 (118%)

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 9800 GT 512MB

Amazon.com

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GeForce GT 340

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 9800 GT 512MB GeForce GT 340
Manufacturer nVidia nVidia
Year July 2008 February 2010
Code Name G92a/b GT215
Memory 512 MB 512 MB
Core Speed 600 MHz 550 MHz
Memory Speed 1800 MHz 3400 MHz
Power (Max TDP) 105 watts 69 watts
Bandwidth 57600 MB/sec 54400 MB/sec
Texel Rate 33600 Mtexels/sec 17600 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 4400 Mpixels/sec
Unified Shaders 112 96
Texture Mapping Units 56 32
Render Output Units 16 8
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 65/55 nm 40 nm
Transistors 754 million 727 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.3

Memory Bandwidth: 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 bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially 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 9800 GT 512MB

Amazon.com

Check prices at:

GeForce GT 340

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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