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GeForce 8800 Ultra vs GeForce GTX 275

Intro

The GeForce 8800 Ultra features core speeds of 612 MHz on the GPU, and 1080 MHz on the 768 MB of GDDR3 memory. It features 128 SPUs along with 64 TAUs and 24 Rasterization Operator Units.

Compare those specifications to the GeForce GTX 275, which has a core clock frequency of 633 MHz and a GDDR3 memory speed of 1134 MHz. It also features a 448-bit memory bus, and uses a 55 nm design. It is comprised of 240 SPUs, 80 Texture Address Units, and 28 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 Ultra 171 Watts
GeForce GTX 275 219 Watts
Difference: 48 Watts (28%)

Memory Bandwidth

In theory, the GeForce GTX 275 should perform a lot faster than the GeForce 8800 Ultra in general. (explain)

GeForce GTX 275 127008 MB/sec
GeForce 8800 Ultra 103680 MB/sec
Difference: 23328 (23%)

Texel Rate

The GeForce GTX 275 will be a lot (more or less 29%) better at anisotropic filtering than the GeForce 8800 Ultra. (explain)

GeForce GTX 275 50640 Mtexels/sec
GeForce 8800 Ultra 39168 Mtexels/sec
Difference: 11472 (29%)

Pixel Rate

The GeForce GTX 275 should be quite a bit (about 21%) faster with regards to anti-aliasing than the GeForce 8800 Ultra, and capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 275 17724 Mpixels/sec
GeForce 8800 Ultra 14688 Mpixels/sec
Difference: 3036 (21%)

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 Ultra

Amazon.com

Check prices at:

GeForce GTX 275

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

Display Specifications

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Model GeForce 8800 Ultra GeForce GTX 275
Manufacturer nVidia nVidia
Year May 2007 April 9, 2009
Code Name G80 G200b
Memory 768 MB 896 MB
Core Speed 612 MHz 633 MHz
Memory Speed 2160 MHz 2268 MHz
Power (Max TDP) 171 watts 219 watts
Bandwidth 103680 MB/sec 127008 MB/sec
Texel Rate 39168 Mtexels/sec 50640 Mtexels/sec
Pixel Rate 14688 Mpixels/sec 17724 Mpixels/sec
Unified Shaders 128 240
Texture Mapping Units 64 80
Render Output Units 24 28
Bus Type GDDR3 GDDR3
Bus Width 384-bit 448-bit
Fab Process 90 nm 55 nm
Transistors 681 million 1400 million
Bus PCIe x16 PCIe x16 2.0
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.1

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 in one second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video 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 amount of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8800 Ultra

Amazon.com

Check prices at:

GeForce GTX 275

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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