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GeForce 8300 GS (OEM) vs GeForce GT 640 DDR3

Intro

The GeForce 8300 GS (OEM) makes use of a 80 nm design. nVidia has clocked the core speed at 450 MHz. The DDR2 RAM is set to run at a frequency of 400 MHz on this model. It features 8 SPUs along with 4 TAUs and 2 ROPs.

Compare those specs to the GeForce GT 640 DDR3, which has a core clock frequency of 900 MHz and a DDR3 memory frequency of 1782 MHz. It also features a 128-bit bus, and uses 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 8300 GS (OEM) 40 Watts
GeForce GT 640 DDR3 65 Watts
Difference: 25 Watts (63%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 640 DDR3 will be 791% quicker than the GeForce 8300 GS (OEM) in general, due to its higher data rate. (explain)

GeForce GT 640 DDR3 57024 MB/sec
GeForce 8300 GS (OEM) 6400 MB/sec
Difference: 50624 (791%)

Texel Rate

The GeForce GT 640 DDR3 will be much (approximately 1500%) better at anisotropic filtering than the GeForce 8300 GS (OEM). (explain)

GeForce GT 640 DDR3 28800 Mtexels/sec
GeForce 8300 GS (OEM) 1800 Mtexels/sec
Difference: 27000 (1500%)

Pixel Rate

The GeForce GT 640 DDR3 should be a lot (about 1500%) faster with regards to AA than the GeForce 8300 GS (OEM), and will be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GT 640 DDR3 14400 Mpixels/sec
GeForce 8300 GS (OEM) 900 Mpixels/sec
Difference: 13500 (1500%)

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 8300 GS (OEM)

Amazon.com

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GeForce GT 640 DDR3

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 8300 GS (OEM) GeForce GT 640 DDR3
Manufacturer nVidia nVidia
Year July 2007 June 2012
Code Name G86 GK107
Memory 128 MB 2048 MB
Core Speed 450 MHz 900 MHz
Memory Speed 800 MHz 3564 MHz
Power (Max TDP) 40 watts 65 watts
Bandwidth 6400 MB/sec 57024 MB/sec
Texel Rate 1800 Mtexels/sec 28800 Mtexels/sec
Pixel Rate 900 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 8 384
Texture Mapping Units 4 32
Render Output Units 2 16
Bus Type DDR2 DDR3
Bus Width 64-bit 128-bit
Fab Process 80 nm 28 nm
Transistors 210 million 1300 million
Bus PCI Express x16 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 information (counted in MB per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a 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. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce 8300 GS (OEM)

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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