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GeForce 8800 Ultra vs GeForce GT 450 (OEM)

Intro

The GeForce 8800 Ultra comes with core speeds of 612 MHz on the GPU, and 1080 MHz on the 768 MB of GDDR3 RAM. It features 128 SPUs as well as 64 Texture Address Units and 24 ROPs.

Compare those specifications to the GeForce GT 450 (OEM), which has a core clock speed of 790 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 192-bit memory bus, and uses a 40 nm design. It features 144 SPUs, 24 TAUs, and 24 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM) 106 Watts
GeForce 8800 Ultra 171 Watts
Difference: 65 Watts (61%)

Memory Bandwidth

In theory, the GeForce 8800 Ultra should be 8% faster than the GeForce GT 450 (OEM) in general, because of its higher bandwidth. (explain)

GeForce 8800 Ultra 103680 MB/sec
GeForce GT 450 (OEM) 96000 MB/sec
Difference: 7680 (8%)

Texel Rate

The GeForce 8800 Ultra should be much (approximately 107%) faster with regards to anisotropic filtering than the GeForce GT 450 (OEM). (explain)

GeForce 8800 Ultra 39168 Mtexels/sec
GeForce GT 450 (OEM) 18960 Mtexels/sec
Difference: 20208 (107%)

Pixel Rate

The GeForce GT 450 (OEM) is a lot (more or less 29%) better at AA than the GeForce 8800 Ultra, and also capable of handling higher screen resolutions while still performing well. (explain)

GeForce GT 450 (OEM) 18960 Mpixels/sec
GeForce 8800 Ultra 14688 Mpixels/sec
Difference: 4272 (29%)

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

Display Prices

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GeForce 8800 Ultra

Amazon.com

Check prices at:

GeForce GT 450 (OEM)

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 GT 450 (OEM)
Manufacturer nVidia nVidia
Year May 2007 October 2010
Code Name G80 GF106
Memory 768 MB 1536 MB
Core Speed 612 MHz 790 MHz
Memory Speed 2160 MHz 4000 MHz
Power (Max TDP) 171 watts 106 watts
Bandwidth 103680 MB/sec 96000 MB/sec
Texel Rate 39168 Mtexels/sec 18960 Mtexels/sec
Pixel Rate 14688 Mpixels/sec 18960 Mpixels/sec
Unified Shaders 128 144
Texture Mapping Units 64 24
Render Output Units 24 24
Bus Type GDDR3 GDDR5
Bus Width 384-bit 192-bit
Fab Process 90 nm 40 nm
Transistors 681 million 1170 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few 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

Hide Prices

GeForce 8800 Ultra

Amazon.com

Check prices at:

GeForce GT 450 (OEM)

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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