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GeForce 9500 GT 1GB GDDR3 vs GeForce 9800 GX2

Intro

The GeForce 9500 GT 1GB GDDR3 uses a 55 nm design. nVidia has clocked the core frequency at 550 MHz. The GDDR3 RAM runs at a frequency of 800 MHz on this specific model. It features 32 SPUs as well as 16 Texture Address Units and 8 ROPs.

Compare those specifications to the GeForce 9800 GX2, which comes with a core clock speed of 600 MHz and a GDDR3 memory frequency of 1000 MHz. It also features a 256-bit memory bus, and makes use of a 65 nm design. It is comprised of 128 SPUs, 64 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9500 GT 1GB GDDR3 50 Watts
GeForce 9800 GX2 197 Watts
Difference: 147 Watts (294%)

Memory Bandwidth

The GeForce 9800 GX2, in theory, should be a lot faster than the GeForce 9500 GT 1GB GDDR3 in general. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce 9500 GT 1GB GDDR3 25600 MB/sec
Difference: 102400 (400%)

Texel Rate

The GeForce 9800 GX2 will be much (about 773%) better at texture filtering than the GeForce 9500 GT 1GB GDDR3. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce 9500 GT 1GB GDDR3 8800 Mtexels/sec
Difference: 68000 (773%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce 9800 GX2 is superior to the GeForce 9500 GT 1GB GDDR3, by a large margin. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce 9500 GT 1GB GDDR3 4400 Mpixels/sec
Difference: 14800 (336%)

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 9500 GT 1GB GDDR3

Amazon.com

Check prices at:

GeForce 9800 GX2

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 9500 GT 1GB GDDR3 GeForce 9800 GX2
Manufacturer nVidia nVidia
Year July 2008 Mar 2008
Code Name G96b G92
Memory 1024 MB 512 MB (x2)
Core Speed 550 MHz 600 MHz (x2)
Memory Speed 1600 MHz 2000 MHz (x2)
Power (Max TDP) 50 watts 197 watts
Bandwidth 25600 MB/sec 128000 MB/sec
Texel Rate 8800 Mtexels/sec 76800 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 19200 Mpixels/sec
Unified Shaders 32 128 (x2)
Texture Mapping Units 16 64 (x2)
Render Output Units 8 16 (x2)
Bus Type GDDR3 GDDR3
Bus Width 128-bit 256-bit (x2)
Fab Process 55 nm 65 nm
Transistors 314 million 754 million
Bus PCIe x16 2.0, PCI PCIe x16 2.0
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called 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 - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce 9500 GT 1GB GDDR3

Amazon.com

Check prices at:

GeForce 9800 GX2

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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