HIS Radeon HD 4650 512MB iSilence4 review - Radeon HD 4650 architecture

by Hilbert Hagedoorn on: 03/04/2009 03:00 PM [ ] 0 comment(s)

Last year AMD announced the Radeon HD 4650 and 4670.

Both products were released in the Q3 2008 timeframe. There is now a multitude of variations across the budget from a low-end to mid-range segment. AMD also introduced a lot of variations in the lower end 4000 series as you'll spot:

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

From top to bottom these products are 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.

The Radeon HD 4600 series will remain below 70 Watts power consumption, in fact you don't even need to connect it to a 6-pin PSU power connector. That reeks of good performance per wattage alright.

	ATI Radeon HD 4850	ATI Radeon HD 4670	ATI Radeon HD 4650	ATI Radeon HD 3870
# of transistors	965 million	514 million	514 million	666 million
Stream Processing Units	800	320	320	320
Clock speed	625 MHz	750 MHz	600 MHz	775+ MHz
Memory Clock	2000 MHz GDDR3 (effective)	2.0 GHz GDDR3 (effective)	1.0 GHz GDDR2 (effective)	2.25 GHz GDDR3 (effective)
Math processing rate (Multiply Add)	1000 GigaFLOPS	480 GigaFLOPS	480 GigaFLOPS	384 GigaFLOPS
Texture Units	40	32	32	16
Render back-ends	16	16	16	16
Memory	512MB GDDR3	512MB GDDR3	512MB GDDR2	512MB GDDR3/4
Memory interface	256-bit	128-bit	128-bit	256-bit
Fabrication process	55nm	55nm	55nm	55nm
Power Consumption (peak)	~110W	~59W	~59W	~105W

Above, a comparison scaled over the newer and older budget to mid-range products.

HIS RAdeon HD 4850 512MB iSilence4

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