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GeForce 8800 Ultra vs GeForce GTX 295

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 as well as 64 TAUs and 24 Rasterization Operator Units.

Compare those specifications to the GeForce GTX 295, which makes use of a 55 nm design. nVidia has set the core frequency at 576 MHz. The GDDR3 memory is set to run at a speed of 999 MHz on this specific card. It features 240 SPUs along with 80 Texture Address Units and 28 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 Ultra 171 Watts
GeForce GTX 295 289 Watts
Difference: 118 Watts (69%)

Memory Bandwidth

Performance-wise, the GeForce GTX 295 should theoretically be a lot better than the GeForce 8800 Ultra overall. (explain)

GeForce GTX 295 223776 MB/sec
GeForce 8800 Ultra 103680 MB/sec
Difference: 120096 (116%)

Texel Rate

The GeForce GTX 295 is a lot (approximately 135%) more effective at texture filtering than the GeForce 8800 Ultra. (explain)

GeForce GTX 295 92160 Mtexels/sec
GeForce 8800 Ultra 39168 Mtexels/sec
Difference: 52992 (135%)

Pixel Rate

The GeForce GTX 295 should be a lot (approximately 120%) more effective at anti-aliasing than the GeForce 8800 Ultra, and also capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 295 32256 Mpixels/sec
GeForce 8800 Ultra 14688 Mpixels/sec
Difference: 17568 (120%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce 8800 Ultra

Amazon.com

Check prices at:

GeForce GTX 295

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 Ultra GeForce GTX 295
Manufacturer nVidia nVidia
Year May 2007 January 8, 2009
Code Name G80 G200b
Memory 768 MB 896 MB (x2)
Core Speed 612 MHz 576 MHz (x2)
Memory Speed 2160 MHz 1998 MHz (x2)
Power (Max TDP) 171 watts 289 watts
Bandwidth 103680 MB/sec 223776 MB/sec
Texel Rate 39168 Mtexels/sec 92160 Mtexels/sec
Pixel Rate 14688 Mpixels/sec 32256 Mpixels/sec
Unified Shaders 128 240 (x2)
Texture Mapping Units 64 80 (x2)
Render Output Units 24 28 (x2)
Bus Type GDDR3 GDDR3
Bus Width 384-bit 448-bit (x2)
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: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the 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 amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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

Display Prices

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GeForce 8800 Ultra

Amazon.com

Check prices at:

GeForce GTX 295

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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