what is the difference between asus p4t533 i850e and p4t533-c

[babah]

Asus P4T533-C Motherboard for intel Processors, Retail Specifications: Processor Socket 478 for FC-PGA2 Pentium® 4 1.4GHz to 2.2GHz+
Chipset: Intel 850E ICH2
FSB 533/400 MHz
Memory 4 x RAMBUS Sockets Max.2GB, RDRAMS PC1066/PC800 Compliant RIMM
Expansion Slots: 1 x AGP 4X 5 x PCI 2 USB
IDE Ports 2 x UltraDMA 100/66/33
Audio ac97 codec S/PDIF-in
Onboard LAN Intel® 82562ET PHY
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Asus P4T533 i850E Motherboard for P4 Processors Retail
Specifications:
Supported CPU:Socket 478 for Intel® Pentium® 4
Chipset:Intel® 82850E MCH Intel® 82801 BA ICH2
FSB:533 / 400 MHz
RAM:2 x 232-pin 32-bit RIMM Sockets support max. 2GB PC800 RIMM3200 (800MHz) / RIMM4200 (1066MHz) ECC / non-ECC RAMBUS memory.
IDE:2 x UltraDMA 100 / 66 / 33
Slots:1 x AGP Pro (1.5V only) 6 x PCI
Ports:2xCOM,2xPS2,2xUSB, and Audio Ports
Onboard Audio, C-Media



So this is mean if i use asus p4t533 i850e i can use either pc1066 memory or rimm4200 memory...correct me if i wrong??

Thanks guys