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GeForce 9800 GTX vs GeForce GTX 650


Intro

The GeForce 9800 GTX has a core clock speed of 675 MHz and a GDDR3 memory frequency of 1100 MHz. It also uses a 256-bit memory bus, and uses a 65 nm design. It is comprised of 128 SPUs, 64 Texture Address Units, and 16 Raster Operation Units.

Compare those specifications to the GeForce GTX 650, which has a core clock frequency of 1058 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 384 SPUs, 32 TAUs, and 16 ROPs.

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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

Performance-wise, the GeForce GTX 650 should in theory be a bit better than the GeForce 9800 GTX overall. (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%) more effective at texture filtering than the GeForce GTX 650. (explain)

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

Pixel Rate

The GeForce GTX 650 will be a lot (about 57%) faster with regards to AA than the GeForce 9800 GTX, and will be able to handle higher screen resolutions without losing too much performance. (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

GeForce GTX 650

Amazon.com

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: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce 9800 GTX

Amazon.com

GeForce GTX 650

Amazon.com

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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