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GeForce 9800 GX2 vs GeForce GTS 250 1GB

Intro

The GeForce 9800 GX2 has a core clock speed of 600 MHz and a GDDR3 memory frequency of 1000 MHz. It also uses a 256-bit memory bus, and makes use of a 65 nm design. It features 128 SPUs, 64 Texture Address Units, and 16 Raster Operation Units.

Compare those specs to the GeForce GTS 250 1GB, which has core clock speeds of 738 MHz on the GPU, and 1100 MHz on the 1024 MB of GDDR3 memory. It features 128 SPUs as well as 64 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 250 1GB 145 Watts
GeForce 9800 GX2 197 Watts
Difference: 52 Watts (36%)

Memory Bandwidth

In theory, the GeForce 9800 GX2 is 82% faster than the GeForce GTS 250 1GB overall, due to its higher data rate. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce GTS 250 1GB 70400 MB/sec
Difference: 57600 (82%)

Texel Rate

The GeForce 9800 GX2 should be a lot (more or less 63%) more effective at anisotropic filtering than the GeForce GTS 250 1GB. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce GTS 250 1GB 47232 Mtexels/sec
Difference: 29568 (63%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 9800 GX2 is the winner, and very much so. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce GTS 250 1GB 11808 Mpixels/sec
Difference: 7392 (63%)

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 9800 GX2

Amazon.com

Check prices at:

GeForce GTS 250 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 9800 GX2 GeForce GTS 250 1GB
Manufacturer nVidia nVidia
Year Mar 2008 March 3, 2009
Code Name G92 G92a/b
Memory 512 MB (x2) 1024 MB
Core Speed 600 MHz (x2) 738 MHz
Memory Speed 2000 MHz (x2) 2200 MHz
Power (Max TDP) 197 watts 145 watts
Bandwidth 128000 MB/sec 70400 MB/sec
Texel Rate 76800 Mtexels/sec 47232 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 11808 Mpixels/sec
Unified Shaders 128 (x2) 128
Texture Mapping Units 64 (x2) 64
Render Output Units 16 (x2) 16
Bus Type GDDR3 GDDR3
Bus Width 256-bit (x2) 256-bit
Fab Process 65 nm 65/55 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 3.1

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total number of texture units by the core clock 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 applied in a 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. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce 9800 GX2

Amazon.com

Check prices at:

GeForce GTS 250 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.

Comments

One Response to “GeForce 9800 GX2 vs GeForce GTS 250 1GB”
abdul rehman says:

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