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GeForce 9600 GSO 512MB vs GeForce GT 640 DDR3

Intro

The GeForce 9600 GSO 512MB comes with a core clock speed of 650 MHz and a GDDR3 memory frequency of 900 MHz. It also makes use of a 256-bit memory bus, and uses a 65/55 nm design. It is comprised of 96 SPUs, 48 TAUs, and 16 ROPs.

Compare those specifications to the GeForce GT 640 DDR3, which features core clock speeds of 900 MHz on the GPU, and 1782 MHz on the 2048 MB of DDR3 memory. It features 384 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3 65 Watts
GeForce 9600 GSO 512MB 90 Watts
Difference: 25 Watts (38%)

Memory Bandwidth

In theory, the GeForce 9600 GSO 512MB will be 1% quicker than the GeForce GT 640 DDR3 in general, because of its greater data rate. (explain)

GeForce 9600 GSO 512MB 57600 MB/sec
GeForce GT 640 DDR3 57024 MB/sec
Difference: 576 (1%)

Texel Rate

The GeForce 9600 GSO 512MB is a bit (about 8%) faster with regards to texture filtering than the GeForce GT 640 DDR3. (explain)

GeForce 9600 GSO 512MB 31200 Mtexels/sec
GeForce GT 640 DDR3 28800 Mtexels/sec
Difference: 2400 (8%)

Pixel Rate

The GeForce GT 640 DDR3 will be much (more or less 38%) better at AA than the GeForce 9600 GSO 512MB, and will be able to handle higher resolutions without losing too much performance. (explain)

GeForce GT 640 DDR3 14400 Mpixels/sec
GeForce 9600 GSO 512MB 10400 Mpixels/sec
Difference: 4000 (38%)

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 9600 GSO 512MB

Amazon.com

Check prices at:

GeForce GT 640 DDR3

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 9600 GSO 512MB GeForce GT 640 DDR3
Manufacturer nVidia nVidia
Year October 2008 June 2012
Code Name G94a/b GK107
Memory 512 MB 2048 MB
Core Speed 650 MHz 900 MHz
Memory Speed 1800 MHz 3564 MHz
Power (Max TDP) 90 watts 65 watts
Bandwidth 57600 MB/sec 57024 MB/sec
Texel Rate 31200 Mtexels/sec 28800 Mtexels/sec
Pixel Rate 10400 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 96 384
Texture Mapping Units 48 32
Render Output Units 16 16
Bus Type GDDR3 DDR3
Bus Width 256-bit 128-bit
Fab Process 65/55 nm 28 nm
Transistors 505 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 4.2

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 texture map elements (texels) that can be processed per second. This is worked out by multiplying the total texture units by the core clock 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 applied in one second.

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

Display Prices

Hide Prices

GeForce 9600 GSO 512MB

Amazon.com

Check prices at:

GeForce GT 640 DDR3

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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