DRAM freq only 333MHz, ram capable of more?

Hi all,

I tried a search but I didn't find anything resembling my question.

I have an Asus Pro61SF laptop with 2x2GB of pc2-6400 ram, which should be capable of 400MHz dram / memory bus speed, however, my system is only running at 333.3MHz. Any ideas why this might be? CPUZ info below:

Name Intel Mobile Core 2 Duo T6500
Codename Penryn
Specification Intel(R) Core(TM)2 Duo CPU T6500 @ 2.10GHz

Northbridge SiS 671/FX/DX/MX rev. 00
Southbridge SiS 968 rev. 01
Graphic Interface PCI-Express
PCI-E Link Width x16
PCI-E Max Link Width x16
Memory Type DDR2
Memory Size 4096 MBytes
Channels Single
Memory Frequency 333.4 MHz (6:10)
CAS# latency (CL) 5.0
RAS# to CAS# delay (tRCD) 5
RAS# Precharge (tRP) 5
Cycle Time (tRAS) 15

Memory SPD
DIMM # 1
SMBus address 0x50
Memory type DDR2
Module format SO-DIMM
Manufacturer (ID) Nanya Technology (7F7F7F0B00000000)
Size 2048 MBytes
Max bandwidth PC2-6400 (400 MHz)
Part number NT2GT64U8HD0BN-AD
Serial number 4D752712
Manufacturing date Week 25/Year 09
Number of banks 2
Data width 64 bits
Correction None
Nominal Voltage 1.80 Volts
EPP no
XMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 4.0-4-4-12-16 @ 266 MHz
JEDEC #2 5.0-5-5-15-20 @ 333 MHz
JEDEC #3 6.0-6-6-18-24 @ 400 MHz
3 answers Last reply
More about dram freq 333mhz capable more
  1. bump
  2. Does your motherboard really support ddr2 400?
  3. It's an asus gaming laptop, and using ddr2, so I assumed it would run ddr2 at 800MHz. How can I test if it is not?
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