ATI Radeon HD 4670 review - 2 - AMD's Radeon series 4600 chipset

Name: ATI Radeon HD 4670 review
Brand: ATI Radeon

by Hilbert Hagedoorn on: 09/09/2008 02:00 PM [

] 0 comment(s)

AMD today announces the Radeon HD 4670 but is actually releasing a couple of products this month. There will be a multitude in variation across the budget from a low-end to mid-range segment. Though most products are still disclosed, I will give you a little bit of a preview what AMD is working on. So AMD is working on two new product series, the Radeon HD 4500 and Radeon HD 4600 product line. Within these two lines you'll see a lot of products. From top to bottom these products will all be based on a 146 mm2 55nm chip, with the UVD 2.0, DirectX 10.1 and 8 channel sound through HDMI. The entry-level 4500 based product will have 80 Shader (Stream) processors, all 4600 series products will have a far nicer 320 Shader processors.

Some interesting facts; the uber low-end 4500 cards will consume less than 25 Watts of power ! The 4600 series will remain below 70 Watts, in fact you don't even need to connect them to your PSU's 6-pin power connector. That reeks of a good performance per watt.

	ATI Radeon HD 4850	ATI Radeon HD 4870	ATI Radeon HD 4670	ATI Radeon HD 3870
# of transistors	965 million	965 million	514 million	666 million
Stream Processing Units	800	800	320	320
Clock speed	625 MHz	750 MHz	750 MHz	775+ MHz
Memory Clock	2000 MHz GDDR3 (effective)	3600 MHz GDDR5 (effective)	2.0 GHz GDDR3 (effective)	2.25 GHz GDDR3 (effective)
Math processing rate (Multiply Add)	1000 GigaFLOPS	1200 GigaFLOPS	480 GigaFLOPS	497+ GigaFLOPS
Texture Units	40	40	32	16
Render back-ends	16	16	16	16
Memory	512MB GDDR3	512MB GDDR5	512MB GDDR3	512MB GDDR3/4
Memory interface	256-bit	256-bit	128-bit	256-bit
Fabrication process	55nm	55nm	55nm	55nm
Power Consumption (peak)	~110W	~160W	~59W	~105W

So here's a good comparison scaled over the newer and older products. Mind you that AMD will also introduce a lot of variations in the 4600 series as you'll spot:

Radeon HD 4670 (RV730XT) at 79 USD
Radeon HD 4650 (RV730Pro) at 74 USD GDDR3
Radeon HD 4650 (RV730Pro) GDDR2 (69 USD)
Radeon HD 4550 (RV710XT) GDDR3 (45-55 USD)

	ATI Radeon HD 4850	ATI Radeon HD 4870	ATI Radeon HD 4670	ATI Radeon HD 4550
# of transistors	965 million	965 million	514million	242 million
Stream Processing Units	800	800	320	80
Clock speed	625 MHz	750 MHz	750 MHz	600 MHz
Memory Clock	2000 MHz GDDR3 (effective)	3600 MHz GDDR5 (effective)	2.0 GHz GDDR3 (effective)	800 MHz GDDR3 (effective)
Math processing rate (Multiply Add)	1000 GigaFLOPS	1200 GigaFLOPS	480 GigaFLOPS	NDA
Texture Units	40	40	32	8
Render back-ends	16	16	16	NDA
Memory	512MB GDDR3	512MB GDDR5	512MB GDDR3	512MB GDDR3
Memory interface	256-bit	256-bit	128-bit	128-bit
Fabrication process	55nm	55nm	55nm	55nm
Power Consumption (peak)	~110W	~160W	~59W	~25W

That's not it as late September a 1 GB version of the Radeon HD 4670 will be released as well with a 750 core clock frequency and 1800 MHz GDDR3 memory, again 1 GB. For those interested, the 4650 will be based on the same processor as 4670, yet comes with a 600 MHz core frequency and and 1000 MHz memory (effective), which is going to be its bottleneck. And we'll see an uber-low end Radeon HD 4550 as well. Above some info that i can share, yet most of it falls under NDA still.

This entire product range will start seeing availability throughout September 2008. But let's have a look what we are actually testing today.

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