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GeForce 9800 GTX vs GeForce GTX 650

Intro

The GeForce 9800 GTX features a clock frequency of 675 MHz and a GDDR3 memory speed of 1100 MHz. It also features a 256-bit bus, and makes use of a 65 nm design. It is made up of 128 SPUs, 64 TAUs, and 16 Raster Operation Units.

Compare all that to the GeForce GTX 650, which features a clock speed of 1058 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 384 SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
GeForce 9800 GTX 140 Watts
Difference: 76 Watts (119%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 650 will be 14% quicker than the GeForce 9800 GTX overall, because of its higher bandwidth. (explain)

GeForce GTX 650 80000 MB/sec
GeForce 9800 GTX 70400 MB/sec
Difference: 9600 (14%)

Texel Rate

The GeForce 9800 GTX will be much (approximately 28%) better at AF than the GeForce GTX 650. (explain)

GeForce 9800 GTX 43200 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 9344 (28%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 650 is the winner, and very much so. (explain)

GeForce GTX 650 16928 Mpixels/sec
GeForce 9800 GTX 10800 Mpixels/sec
Difference: 6128 (57%)

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.

Price Comparison

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GeForce 9800 GTX

Amazon.com

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GeForce GTX 650

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 9800 GTX GeForce GTX 650
Manufacturer nVidia nVidia
Year April 2008 September 2012
Code Name G92 GK107
Memory 512 MB 1024 MB
Core Speed 675 MHz 1058 MHz
Memory Speed 2200 MHz 5000 MHz
Power (Max TDP) 140 watts 64 watts
Bandwidth 70400 MB/sec 80000 MB/sec
Texel Rate 43200 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 10800 Mpixels/sec 16928 Mpixels/sec
Unified Shaders 128 384
Texture Mapping Units 64 32
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 65 nm 28 nm
Transistors 754 million 1300 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better 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 could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core 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 output rate is also dependant on quite a few other factors, most notably 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 9800 GTX

Amazon.com

Check prices at:

GeForce GTX 650

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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