GeForce 8800 GT 1GB vs Radeon HD 4850 2GB

Intro

The GeForce 8800 GT 1GB uses a 65 nm design. nVidia has clocked the core speed at 600 MHz. The GDDR3 memory is set to run at a speed of 900 MHz on this card. It features 112 SPUs along with 56 TAUs and 16 ROPs.

Compare those specs to the Radeon HD 4850 2GB, which has a core clock frequency of 625 MHz and a GDDR4 memory speed of 993 MHz. It also features a 256-bit memory bus, and makes use of a 55 nm design. It is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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 GT 1GB Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Radeon HD 4850 2GB Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	GeForce 8800 GT 1GB	Radeon HD 4850 2GB
Manufacturer	nVidia	ATi
Year	Dec 2007	Jun 25, 2008
Code Name	G92	RV770 PRO
Fab Process	65 nm	55 nm
Bus	PCIe x16 2.0	PCIe 2.0 x16
Memory	1024 MB	2048 MB
Core Speed	600 MHz	625 MHz
Shader Speed	1500 MHz	(N/A) MHz
Memory Speed	900 MHz	993 MHz
Unified Shaders	112	800(160x5)
Texture Mapping Units	56	40
Render Output Units	16	16
Bus Type	GDDR3	GDDR4
Bus Width	256-bit	256-bit
DirectX Version	DirectX 10	DirectX 10.1
OpenGL Version	OpenGL 3.0	OpenGL 3.0
Power (Max TDP)	105 watts	110 watts
Shader Model	4.0	4.1
Bandwidth	57600 MB/sec	63552 MB/sec
Texel Rate	33600 Mtexels/sec	25000 Mtexels/sec
Pixel Rate	9600 Mpixels/sec	10000 Mpixels/sec

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per 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 better this number, the better the graphics 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 most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.