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GeForce 9800 GT 512MB vs GeForce 9800 GTX+

Intro

The GeForce 9800 GT 512MB has a clock frequency of 600 MHz and a GDDR3 memory speed of 900 MHz. It also uses a 256-bit memory bus, and uses a 65/55 nm design. It is made up of 112 SPUs, 56 TAUs, and 16 ROPs.

Compare all of that to the GeForce 9800 GTX+, which makes use of a 55 nm design. nVidia has clocked the core speed at 738 MHz. The GDDR3 RAM is set to run at a speed of 1100 MHz on this particular model. It features 128 SPUs along with 64 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 512MB 105 Watts
GeForce 9800 GTX+ 145 Watts
Difference: 40 Watts (38%)

Memory Bandwidth

The GeForce 9800 GTX+, in theory, should perform quite a bit faster than the GeForce 9800 GT 512MB overall. (explain)

GeForce 9800 GTX+ 70400 MB/sec
GeForce 9800 GT 512MB 57600 MB/sec
Difference: 12800 (22%)

Texel Rate

The GeForce 9800 GTX+ is quite a bit (about 41%) faster with regards to anisotropic filtering than the GeForce 9800 GT 512MB. (explain)

GeForce 9800 GTX+ 47232 Mtexels/sec
GeForce 9800 GT 512MB 33600 Mtexels/sec
Difference: 13632 (41%)

Pixel Rate

The GeForce 9800 GTX+ is quite a bit (about 23%) faster with regards to AA than the GeForce 9800 GT 512MB, and also able to handle higher resolutions without slowing down too much. (explain)

GeForce 9800 GTX+ 11808 Mpixels/sec
GeForce 9800 GT 512MB 9600 Mpixels/sec
Difference: 2208 (23%)

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 9800 GTX+

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 9800 GTX+
Manufacturer nVidia nVidia
Year July 2008 July 2008
Code Name G92a/b G92b
Memory 512 MB 512 MB
Core Speed 600 MHz 738 MHz
Memory Speed 1800 MHz 2200 MHz
Power (Max TDP) 105 watts 145 watts
Bandwidth 57600 MB/sec 70400 MB/sec
Texel Rate 33600 Mtexels/sec 47232 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 11808 Mpixels/sec
Unified Shaders 112 128
Texture Mapping Units 56 64
Render Output Units 16 16
Bus Type GDDR3 GDDR3
Bus Width 256-bit 256-bit
Fab Process 65/55 nm 55 nm
Transistors 754 million 754 million
Bus PCIe x16 2.0 PCIe x16 2.0
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 can be applied in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce 9800 GT 512MB

Amazon.com

Check prices at:

GeForce 9800 GTX+

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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