MY MOTHERBOARD DOESN'T SUPPORT MY RAM YET IT DOES,HOW IS THIS POSSIBLE?

Question

Well i was checking out my motherboard specs so i could buy a new ram stick(my pc was runing slow) and i noticed that my mother board could handle ram up to 4g 533 MHz • 667 MHz;and than when i went to see what ram i had it says its DDR2 512Mg 266 MHz how is this possible? all specs down below.
Thx and cheers!

Biostar P4M900-M4 Motherboard
Product MPN
MPN P4M900-M4
Key Features
Form Factor Micro ATX
Compatibility PC
Chipset VIA P4M900
Compatible Processors Intel Celeron, Intel Pentium 4, Intel Celeron D, Intel Pentium D
Front Side Bus Speed 800 MHz
Video Interface PCI Express x16
Storage Controller Type(s) Serial ATA x 2, DMA/ATA-100 (Ultra) x 2
Technical Features
Integrated Input/Output Ports USB 2.0 x 6 • Serial Port x 1 • RJ45 Lan Port x 1 • PS/2 Mouse x 1 • PS/2 Keyboard x 1 • Floppy Port x 1
Expansion Slots PCI Express x16 x 1 • PCI Express x1 x 1 • PCI x 2
RAID Support SATA RAID 0 • SATA RAID 1
South Bridge Chip VIA VT8237A
Processor
Socket Type Socket 478
Max supported CPUs qty 1
Memory
Memory Type DDR2 SDRAM
Number of Memory Slots 2 x 240 Pin DIMMs
Supported RAM speeds 533 MHz • 667 MHz
Max Supported RAM 4 GB
Audio / Video
Audio Output Sound Card • 5.1 Channels • Line Out
Integrated Audio Realtek ALC861
Audio Input Microphone Jack • 1 x Line In
Video Out Ports 15 Pin D-Sub VGA port x 1
On Board Graphic Processor VIA Chrome9
Communication
Networking Type Ethernet, Fast Ethernet
Other Features
Other Features Hyper Thread Technology Ready • 64bit Ready • Virtualization Technology
Fans 2 x 3-pin fan headers
Chassis Type Desktop

RAM:
Memory slots
Total memory slots 2
Used memory slots 2
Free memory slots 0
Memory
Type DDR2
Size 1024 MBytes
Channels # Single
DRAM Frequency 266.7 MHz
CAS# Latency (CL) 4 clocks
RAS# to CAS# Delay (tRCD) 4 clocks
RAS# Precharge (tRP) 4 clocks
Cycle Time (tRAS) 11 clocks
Command Rate (CR) 2T
SPD
Number Of SPD Modules 2
Slot #1
Type DDR2
Size 512 MBytes
Manufacturer Samsung
Max Bandwidth PC2-4300 (266 MHz)
Part Number M3 78T6553CZ3-CD5
Serial Number F616268D
Week/year 53 / 06
SPD Ext. EPP
JEDEC #3
Frequency 266.7 MHz
CAS# Latency 5.0
RAS# To CAS# 4
RAS# Precharge 4
tRAS 11
tRC 15
Voltage 1.800 V
JEDEC #2
Frequency 266.7 MHz
CAS# Latency 4.0
RAS# To CAS# 4
RAS# Precharge 4
tRAS 11
tRC 15
Voltage 1.800 V
JEDEC #1
Frequency 200.0 MHz
CAS# Latency 3.0
RAS# To CAS# 3
RAS# Precharge 3
tRAS 8
tRC 11
Voltage 1.800 V
Slot #2
Type DDR2
Size 512 MBytes
Manufacturer Samsung
Max Bandwidth PC2-4300 (266 MHz)
Part Number M3 78T6553CZ3-CD5
Serial Number F616268C
Week/year 53 / 06
SPD Ext. EPP
JEDEC #3
Frequency 266.7 MHz
CAS# Latency 5.0
RAS# To CAS# 4
RAS# Precharge 4
tRAS 11
tRC 15
Voltage 1.800 V
JEDEC #2
Frequency 266.7 MHz
CAS# Latency 4.0
RAS# To CAS# 4
RAS# Precharge 4
tRAS 11
tRC 15
Voltage 1.800 V
JEDEC #1
Frequency 200.0 MHz
CAS# Latency 3.0
RAS# To CAS# 3
RAS# Precharge 3
tRAS 8
tRC 11
Voltage 1.800 V

Answer 1

You got the info from cpu-z? if that is the case note that it mentions the actual Ram speed. The 533Mhz and 667 etc are double that speed because of the dual channel technology you can use to achieve those speed. so 266,7 x2 makes roughly 533 and 333x2 goes for 667. To take advantage of this you should by another same stick and put it in the corresponding slot of the other pair of memory slots than the one you have already installed. E.g. if your current stick is in slot one of the first pair then you should put it in slot one of the second pair. Nevertheless, my advice would be to buy and use 2x1 GB 667Mhz and remove altogether the 512MB 533.

Answer 2

Get in touch with the Manufacturer of Your Computer.

They may Help.

I have my computer repaired by following their advice.



IC XC NIKA

Answer 3

the ram you have is less spec than the mobo will take.

Answer 4

exactly UP to, meaning anything lower will work.