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GeForce 9800 GX2 vs GeForce GT 450 (OEM)

Intro

The GeForce 9800 GX2 makes use of a 65 nm design. nVidia has clocked the core frequency at 600 MHz. The GDDR3 RAM runs at a speed of 1000 MHz on this model. It features 128 SPUs as well as 64 Texture Address Units and 16 Rasterization Operator Units.

Compare that to the GeForce GT 450 (OEM), which features core clock speeds of 790 MHz on the GPU, and 1000 MHz on the 1536 MB of GDDR5 memory. It features 144 SPUs along with 24 Texture Address Units and 24 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM) 106 Watts
GeForce 9800 GX2 197 Watts
Difference: 91 Watts (86%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GX2 should theoretically be much superior to the GeForce GT 450 (OEM) overall. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce GT 450 (OEM) 96000 MB/sec
Difference: 32000 (33%)

Texel Rate

The GeForce 9800 GX2 is much (approximately 305%) more effective at AF than the GeForce GT 450 (OEM). (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce GT 450 (OEM) 18960 Mtexels/sec
Difference: 57840 (305%)

Pixel Rate

The GeForce 9800 GX2 will be a little bit (about 1%) faster with regards to full screen anti-aliasing than the GeForce GT 450 (OEM), and able to handle higher screen resolutions without slowing down too much. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce GT 450 (OEM) 18960 Mpixels/sec
Difference: 240 (1%)

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 GT 450 (OEM)

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 GT 450 (OEM)
Manufacturer nVidia nVidia
Year Mar 2008 October 2010
Code Name G92 GF106
Memory 512 MB (x2) 1536 MB
Core Speed 600 MHz (x2) 790 MHz
Memory Speed 2000 MHz (x2) 4000 MHz
Power (Max TDP) 197 watts 106 watts
Bandwidth 128000 MB/sec 96000 MB/sec
Texel Rate 76800 Mtexels/sec 18960 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 18960 Mpixels/sec
Unified Shaders 128 (x2) 144
Texture Mapping Units 64 (x2) 24
Render Output Units 16 (x2) 24
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 192-bit
Fab Process 65 nm 40 nm
Transistors 754 million 1170 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 are applied in one second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, 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 maximum amount of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. 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 many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 9800 GX2

Amazon.com

Check prices at:

GeForce GT 450 (OEM)

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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