GeForce 8800 Ultra vs GeForce GT 450 (OEM)

Intro

The GeForce 8800 Ultra uses a 90 nm design. nVidia has clocked the core speed at 612 MHz. The GDDR3 memory works at a speed of 1080 MHz on this particular card. It features 128 SPUs along with 64 Texture Address Units and 24 Rasterization Operator Units.

Compare that to the GeForce GT 450 (OEM), which features GPU clock speed of 790 MHz, and 1536 MB of GDDR5 memory running at 1000 MHz through a 192-bit bus. It also is comprised of 144 Stream Processors, 24 TAUs, and 24 ROPs.

Price Comparison

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

GeForce 8800 Ultra Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

GeForce GT 450 (OEM) Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	GeForce 8800 Ultra	GeForce GT 450 (OEM)
Manufacturer	nVidia	nVidia
Year	May 2007	October 2010
Code Name	G80	GF106
Fab Process	90 nm	40 nm
Bus	PCIe x16	PCIe x16
Memory	768 MB	1536 MB
Core Speed	612 MHz	790 MHz
Shader Speed	1500 MHz	1580 MHz
Memory Speed	1080 MHz	1000 MHz
Unified Shaders	128	144
Texture Mapping Units	64	24
Render Output Units	24	24
Bus Type	GDDR3	GDDR5
Bus Width	384-bit	192-bit
DirectX Version	DirectX 10	DirectX 11
OpenGL Version	OpenGL 3.0	OpenGL 4.1
Power (Max TDP)	171 watts	106 watts
Shader Model	4.0	5.0
Bandwidth	103680 MB/sec	96000 MB/sec
Texel Rate	39168 Mtexels/sec	18960 Mtexels/sec
Pixel Rate	14688 Mpixels/sec	18960 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be 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 video 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 maximum amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.