Radeon HD 3850 1GB vs Radeon HD 6670 (OEM) 1GB

Intro

The Radeon HD 3850 1GB makes use of a 55 nm design. ATi has clocked the core speed at 668 MHz. The GDDR3 memory works at a frequency of 828 MHz on this specific model. It features 320(64x5) SPUs as well as 16 Texture Address Units and 16 Rasterization Operator Units.

Compare those specs to the Radeon HD 6670 (OEM) 1GB, which comes with GPU clock speed of 800 MHz, and 1024 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also is made up of 480 SPUs, 24 TAUs, and 8 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.

Radeon HD 3850 1GB Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Radeon HD 6670 (OEM) 1GB Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	Radeon HD 3850 1GB	Radeon HD 6670 (OEM) 1GB
Manufacturer	ATi	ATi
Year	Nov 19, 2007	February 2011
Code Name	RV670 PRO	Turks
Fab Process	55 nm	40 nm
Bus	PCIe 2.0 x16/AGP 8x	PCIe 2.1 x16
Memory	1024 MB	1024 MB
Core Speed	668 MHz	800 MHz
Shader Speed	N/A MHz	(N/A) MHz
Memory Speed	828 MHz	1000 MHz
Unified Shaders	320(64x5)	480
Texture Mapping Units	16	24
Render Output Units	16	8
Bus Type	GDDR3	GDDR5
Bus Width	256-bit	128-bit
DirectX Version	DirectX 10.1	DirectX 11
OpenGL Version	OpenGL 3.0	OpenGL 4.1
Power (Max TDP)	75 watts	63 watts
Shader Model	4.1	5.0
Bandwidth	52992 MB/sec	64000 MB/sec
Texel Rate	10688 Mtexels/sec	19200 Mtexels/sec
Pixel Rate	10688 Mpixels/sec	6400 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of information (measured in MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of texture units by the core clock 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.