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GeForce 8800 GTX vs GeForce GTX 650

Intro

The GeForce 8800 GTX has a clock speed of 575 MHz and a GDDR3 memory speed of 900 MHz. It also uses a 384-bit memory bus, and uses a 90 nm design. It is made up of 128 SPUs, 64 Texture Address Units, and 24 ROPs.

Compare those specs to the GeForce GTX 650, which uses a 28 nm design. nVidia has clocked the core speed at 1058 MHz. The GDDR5 memory is set to run at a frequency of 1250 MHz on this particular model. It features 384 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
GeForce 8800 GTX 155 Watts
Difference: 91 Watts (142%)

Memory Bandwidth

The GeForce 8800 GTX should theoretically be a little bit faster than the GeForce GTX 650 in general. (explain)

GeForce 8800 GTX 86400 MB/sec
GeForce GTX 650 80000 MB/sec
Difference: 6400 (8%)

Texel Rate

The GeForce 8800 GTX is a small bit (approximately 9%) better at AF than the GeForce GTX 650. (explain)

GeForce 8800 GTX 36800 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 2944 (9%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 650 is superior to the GeForce 8800 GTX, by far. (explain)

GeForce GTX 650 16928 Mpixels/sec
GeForce 8800 GTX 13800 Mpixels/sec
Difference: 3128 (23%)

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 8800 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.

Specifications

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Model GeForce 8800 GTX GeForce GTX 650
Manufacturer nVidia nVidia
Year Nov 2006 September 2012
Code Name G80 GK107
Memory 768 MB 1024 MB
Core Speed 575 MHz 1058 MHz
Memory Speed 1800 MHz 5000 MHz
Power (Max TDP) 155 watts 64 watts
Bandwidth 86400 MB/sec 80000 MB/sec
Texel Rate 36800 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 13800 Mpixels/sec 16928 Mpixels/sec
Unified Shaders 128 384
Texture Mapping Units 64 32
Render Output Units 24 16
Bus Type GDDR3 GDDR5
Bus Width 384-bit 128-bit
Fab Process 90 nm 28 nm
Transistors 681 million 1300 million
Bus PCIe x16 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 maximum amount of information (measured in megabytes per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is calculated 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in a 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 filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 8800 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.

Comments

One Response to “GeForce 8800 GTX vs GeForce GTX 650”
Cory says:

Wish I would've found this site sooner than later... Already bought a 650 to replace my 8800. Back to the store!

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