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Guru3D.com » Review » HIS Radeon HD 4650 512MB iSilence4 review » Page 2

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

by Hilbert Hagedoorn on: 03/04/2009 02:00 PM [ ] 0 comment(s)

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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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