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


Intro

The GeForce 8800 GTS (G80) 320MB features core clock speeds of 513 MHz on the GPU, and 792 MHz on the 320 MB of GDDR3 memory. It features 96 SPUs along with 48 Texture Address Units and 20 ROPs.

Compare those specs to the GeForce 9500 GT DDR2, which uses a 65 nm design. nVidia has set the core frequency at 550 MHz. The DDR2 RAM is set to run at a frequency of 500 MHz on this model. It features 32 SPUs as well as 16 Texture Address Units and 8 Rasterization Operator Units.

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

In theory, the GeForce 8800 GTS (G80) 320MB should be 296% faster than the GeForce 9500 GT DDR2 overall, due to its higher bandwidth. (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 is much (approximately 180%) better at AF 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

If running with a high screen resolution is important to you, then the GeForce 8800 GTS (G80) 320MB is a better choice, and very much so. (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 largest amount of data (in units of megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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