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GeForce 8800 GTS (G80) 320MB vs GeForce 9500 GT DDR2


Intro

The GeForce 8800 GTS (G80) 320MB uses a 90 nm design. nVidia has set the core speed at 513 MHz. The GDDR3 RAM is set to run at a frequency of 792 MHz on this specific card. It features 96 SPUs as well as 48 TAUs and 20 Rasterization Operator Units.

Compare that to the GeForce 9500 GT DDR2, which uses a 65 nm design. nVidia has clocked the core frequency at 550 MHz. The DDR2 memory runs at a frequency of 500 MHz on this card. It features 32 SPUs along with 16 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9500 GT DDR2 50 Watts
GeForce 8800 GTS (G80) 320MB 143 Watts
Difference: 93 Watts (186%)

Memory Bandwidth

The GeForce 8800 GTS (G80) 320MB should in theory perform a lot faster than the GeForce 9500 GT DDR2 in general. (explain)

GeForce 8800 GTS (G80) 320MB 63360 MB/sec
GeForce 9500 GT DDR2 16000 MB/sec
Difference: 47360 (296%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB will be a lot (approximately 180%) more effective at anisotropic filtering than the GeForce 9500 GT DDR2. (explain)

GeForce 8800 GTS (G80) 320MB 24624 Mtexels/sec
GeForce 9500 GT DDR2 8800 Mtexels/sec
Difference: 15824 (180%)

Pixel Rate

The GeForce 8800 GTS (G80) 320MB should be much (approximately 133%) better at full screen anti-aliasing than the GeForce 9500 GT DDR2, and should be able to handle higher screen resolutions more effectively. (explain)

GeForce 8800 GTS (G80) 320MB 10260 Mpixels/sec
GeForce 9500 GT DDR2 4400 Mpixels/sec
Difference: 5860 (133%)

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

GeForce 8800 GTS (G80) 320MB

GeForce 9500 GT DDR2

Specifications

Display Specifications

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Model GeForce 8800 GTS (G80) 320MB GeForce 9500 GT DDR2
Manufacturer nVidia nVidia
Year Feb 2007 July 2008
Code Name G80 G96a
Memory 320 MB 256 MB
Core Speed 513 MHz 550 MHz
Memory Speed 1584 MHz 1000 MHz
Power (Max TDP) 143 watts 50 watts
Bandwidth 63360 MB/sec 16000 MB/sec
Texel Rate 24624 Mtexels/sec 8800 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 4400 Mpixels/sec
Unified Shaders 96 32
Texture Mapping Units 48 16
Render Output Units 20 8
Bus Type GDDR3 DDR2
Bus Width 320-bit 128-bit
Fab Process 90 nm 65 nm
Transistors 681 million 314 million
Bus PCIe x16 PCIe x16 2.0, PCI
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 are processed per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, 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 the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

GeForce 8800 GTS (G80) 320MB

GeForce 9500 GT DDR2

Comments

One Response to “GeForce 8800 GTS (G80) 320MB vs GeForce 9500 GT DDR2”
Chris&Rusty says:

I am going to put the 2 in the same rig for a week each and see who is who at seti@home CUDA tasks. I had previously run a 9800 GT. It should be noted I have the PNY 9500 GT, the 8800 GTS is a version made by EVGA as a "eGeForce" not sure but suspect it has nothing to do with the cards abilities.

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