Memory Problem: DDR333 Is Still Rare On The Market

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This overview shows the various memory modules and a comparison of their maximum bandwidths.

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Header Cell - Column 0	Name	Effective Clock Speed	Data Bus	Bandwidth
SDRAM133	PC133	133 MHz	64 Bit	1.06 GB/s
DDR266	PC2100	133 MHz	64 Bit	2.1 GB/s
DDR266-Dual	PC2100	133 MHz	64 Bit	4.2 GB/s
DDR333	PC2700	166 MHz	64 Bit	2.7 GB/s
DDR333-Dual	PC2700	166 MHz	64 Bit	5.4 GB/s
DDR400	PC3300	200 MHz	64 Bit	3.3 GB/s
RDRAM 400	PC800	400 MHz	16 Bit	1.6 GB/s
RDRAM 400-Dual	PC800	400 MHz	16 Bit	3.2 GB/s
RDRAM 533	PC1066	533 MHz	16 Bit	2.1 GB/s
RDRAM 533-Dual	PC1066	533 MHz	16 Bit	4.2 GB/s

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Chipset	SiS 645DX	SiS 645	Intel 850E	Intel 850
Introduction	March 2002	November 2001	June 2002	January 2001
Processor Plattform	Socket 478	Socket 478	Socket 478	Socket 423/478
Supported CPU	Intel Pentium 4	Intel Pentium 4	Intel Pentium 4	Intel Pentium 4
Multiprocessor Support	no	no	yes	yes
Chipset Northbridge	SiS 645DX	SiS 645	Intel KC82850E	Intel KC82850
Chipset Southbridge	SiS 961	SiS 961	Intel 82801 BA	Intel 82801 BA
Front Side Bus Clock	100/133 MHz	100 MHz	100/133 MHz	100/133 MHz
Memory Clock	100/133/166 MHz	100/133/166 MHz	400 MHz/533 MHz	400 MHz
Asynchronous Memory Clock	yes	yes	yes	yes
FSB-Overclocking	up to 166 MHz	up to 133 MHz	up to 166 MHz	up to 133 MHz
max. # DIMM-Slots	3	3	4	4
max. Memory	3072 MB	3072 MB	2048 MB	2048 MB
SDRAM Support	yes	yes	no	no
DDR SDRAM Support	yes	yes	no	no
VC SDRAM Support	no	no	no	no
RIMM Support (Rambus)	no	no	yes	yes
Dual RIMM Support (Rambus)	no	no	yes	yes
Ultra-DMA/33/66/100	yes/yes/yes	yes/yes/yes	yes/yes/yes	yes/yes/yes
Ultra-DMA/133	no	no	no	no
Max. # USB	4	4	4	4
USB 2.0	no	no	yes	no
Max.# PCI Slots	6	6	6	6
Integrated Graphics	yes	yes	no	no
AGP 1x / 2x / 4x	yes / yes / yes	yes / yes / yes	yes / yes / yes	yes / yes / yes
ACPI Features	yes	yes	yes	yes

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Chipset	Intel 845D	Intel 845	VIA P4X266	VIA P4X266A
Introduction	December 2001	July 2001	August 2001	December 2001
Processor Plattform	Socket 478	Socket 423/478	Socket 423/478	Socket 478
Supported CPU	Intel Pentium 4	Intel Pentium 4	Intel Pentium 4	Intel Pentium 4
Multiprocessor Support	no	no	no	no
Chipset Northbridge	Intel 82845	Intel 82845	VIA VT8753	VIA P4X266A
Chipset Southbridge	Intel 82801 BA	Intel 82801 BA	VIA VT8233	VIA VT8233A
Front Side Bus Clock	66/100/133 MHz	66/100/133 MHz	100 MHz	100 MHz
Memory Clock	100/133 MHz	100/133 MHz	100/133 MHz	100/133 MHz
Asynchronous Memory Clock	yes	yes	yes	yes
FSB-Overclocking	up to 166 MHz	up to 180 MHz	up to 180 MHz	up to 180 MHz
max. # DIMM-Slots	3	4	4	4
max. Memory	2048 MB	2048 MB	4096 MB	3072 MB
SDRAM Support	no	yes	yes	yes
DDR SDRAM Support	yes	no	yes	yes
VC SDRAM Support	no	no	yes	yes
RIMM Support (Rambus)	no	no	no	no
Dual RIMM Support (Rambus)	no	no	no	no
Ultra-DMA/33/66/100	yes/yes/yes	yes/yes/yes	yes/yes/yes	yes/yes/yes
Ultra-DMA/133	no	no	no	yes
Max. # USB	4	6	6	6
USB 2.0	no	yes	no	yes
Max.# PCI Slots	6	6	5	5
Integrated Graphics	no	no	no	no
AGP 1x / 2x / 4x	yes / yes / yes	yes / yes / yes	yes / yes / yes	yes / yes / yes
ACPI Features	yes	yes	yes	yes

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