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GeForce 920M vs GeForce 9800 GX2

Intro

The GeForce 920M has a clock frequency of 954 MHz and a DDR3 memory frequency of 900 MHz. It also uses a 64-bit memory bus, and uses a 28 nm design. It is made up of 384 SPUs, 32 TAUs, and 8 ROPs.

Compare those specs to the GeForce 9800 GX2, which features clock speeds of 600 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR3 RAM. It features 128 SPUs as well as 64 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce 9800 GX2 will be 789% faster than the GeForce 920M in general, because of its higher bandwidth. (explain)

GeForce 9800 GX2 128000 MB/sec
GeForce 920M 14400 MB/sec
Difference: 113600 (789%)

Texel Rate

The GeForce 9800 GX2 is much (about 152%) more effective at anisotropic filtering than the GeForce 920M. (explain)

GeForce 9800 GX2 76800 Mtexels/sec
GeForce 920M 30528 Mtexels/sec
Difference: 46272 (152%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce 9800 GX2 is superior to the GeForce 920M, by a large margin. (explain)

GeForce 9800 GX2 19200 Mpixels/sec
GeForce 920M 7632 Mpixels/sec
Difference: 11568 (152%)

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 920M

Amazon.com

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GeForce 9800 GX2

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 920M GeForce 9800 GX2
Manufacturer nVidia nVidia
Year March 12 2015 Mar 2008
Code Name GK208 G92
Memory 2048 MB 512 MB (x2)
Core Speed 954 MHz 600 MHz (x2)
Memory Speed 1800 MHz 2000 MHz (x2)
Power (Max TDP) (Unknown) watts 197 watts
Bandwidth 14400 MB/sec 128000 MB/sec
Texel Rate 30528 Mtexels/sec 76800 Mtexels/sec
Pixel Rate 7632 Mpixels/sec 19200 Mpixels/sec
Unified Shaders 384 128 (x2)
Texture Mapping Units 32 64 (x2)
Render Output Units 8 16 (x2)
Bus Type DDR3 GDDR3
Bus Width 64-bit 256-bit (x2)
Fab Process 28 nm 65 nm
Transistors (Unknown) million 754 million
Bus PCIe 3.0 x16 PCIe x16 2.0
DirectX Version DirectX 12 DirectX 10
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka 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 ability to reach the max fill rate.

Display Prices

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GeForce 920M

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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