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GeForce 9800 GX2 vs GeForce GTX 750

Intro

The GeForce 9800 GX2 features clock speeds of 600 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR3 memory. It features 128 SPUs as well as 64 Texture Address Units and 16 ROPs.

Compare those specs to the GeForce GTX 750, which makes use of a 28 nm design. nVidia has set the core frequency at 1020 MHz. The GDDR5 RAM runs at a speed of 1250 MHz on this specific model. It features 512 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750 55 Watts
GeForce 9800 GX2 197 Watts
Difference: 142 Watts (258%)

Memory Bandwidth

In theory, the GeForce 9800 GX2 is 60% quicker than the GeForce GTX 750 overall, because of its higher data rate. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce GTX 750 80000 MB/sec
Difference: 48000 (60%)

Texel Rate

The GeForce 9800 GX2 is a lot (about 135%) more effective at anisotropic filtering than the GeForce GTX 750. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce GTX 750 32640 Mtexels/sec
Difference: 44160 (135%)

Pixel Rate

The GeForce 9800 GX2 is a small bit (about 18%) better at full screen anti-aliasing than the GeForce GTX 750, and also should be able to handle higher resolutions without slowing down too much. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce GTX 750 16320 Mpixels/sec
Difference: 2880 (18%)

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 GTX 750

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 GTX 750
Manufacturer nVidia nVidia
Year Mar 2008 February 2014
Code Name G92 GM107
Memory 512 MB (x2) 1024 MB
Core Speed 600 MHz (x2) 1020 MHz
Memory Speed 2000 MHz (x2) 5000 MHz
Power (Max TDP) 197 watts 55 watts
Bandwidth 128000 MB/sec 80000 MB/sec
Texel Rate 76800 Mtexels/sec 32640 Mtexels/sec
Pixel Rate 19200 Mpixels/sec 16320 Mpixels/sec
Unified Shaders 128 (x2) 512
Texture Mapping Units 64 (x2) 32
Render Output Units 16 (x2) 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 65 nm 28 nm
Transistors 754 million 1870 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.0 OpenGL 4.4

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once 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, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. 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 get to the maximum fill rate.

Display Prices

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GeForce 9800 GX2

Amazon.com

Check prices at:

GeForce GTX 750

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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