Radeon HD 4670 1GB vs Radeon HD 5450

Intro

The Radeon HD 4670 1GB comes with clock speeds of 750 MHz on the GPU, and 1100 MHz on the 1024 MB of GDDR4/GDDR3/DDR3/DDR2 memory. It features 320(64x5) SPUs along with 32 Texture Address Units and 8 ROPs.

Compare those specs to the Radeon HD 5450, which features a clock frequency of 650 MHz and a DDR3 memory speed of 800 MHz. It also makes use of a 64-bit memory bus, and makes use of a 40 nm design. It is comprised of 80(16x5) SPUs, 8 Texture Address Units, and 4 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.

Radeon HD 4670 1GB Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Radeon HD 5450 Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	Radeon HD 4670 1GB	Radeon HD 5450
Manufacturer	ATi	ATi
Year	Sep 10, 2008	February 4, 2010
Code Name	RV730 XT	Cedar PRO
Fab Process	55 nm	40 nm
Bus	PCIe 2.0 x16, AGP 8x	PCIe 2.1 x16
Memory	1024 MB	512 MB
Core Speed	750 MHz	650 MHz
Shader Speed	N/A MHz	(N/A) MHz
Memory Speed	1100 MHz (2200 MHz effective)	800 MHz (1600 MHz effective)
Unified Shaders	320(64x5)	80(16x5)
Texture Mapping Units	32	8
Render Output Units	8	4
Bus Type	GDDR4/GDDR3/DDR3/DDR2	DDR3
Bus Width	128-bit	64-bit
DirectX Version	DirectX 10.1	DirectX 11
OpenGL Version	OpenGL 3.0	OpenGL 3.2
Power (Max TDP)	70 watts	19 watts
Shader Model	4.1	5.0
Bandwidth	35200 MB/sec	12800 MB/sec
Texel Rate	24000 Mtexels/sec	5200 Mtexels/sec
Pixel Rate	6000 Mpixels/sec	2600 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the 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 amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units of the card 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). 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 max fill rate.