Yoshimitsu Posted August 21, 2009 Share Posted August 21, 2009 I have TWIN2X2048-6400C5 which are running at 333MHz instead of 400MHz. During loading of BIOS (is this called POST?) the memory is reported to run at pc5300. Cpu-z reports the following(concerning the memory): Chipset ------------------------------------------------------------------------- Northbridge Intel i975X rev. C0 Southbridge Intel 82801GB (ICH7/R) rev. A1 Graphic Interface PCI-Express PCI-E Link Width x16 PCI-E Max Link Width x16 Memory Type DDR2 Memory Size 2048 MBytes Channels Dual Memory Frequency 333.9 MHz (4:5) CAS# latency (CL) 5.0 RAS# to CAS# delay (tRCD) 5 RAS# Precharge (tRP) 5 Cycle Time (tRAS) 15 Bank Cycle Time (tRC) 21 MCHBAR I/O Base address 0x0FED14000 MCHBAR I/O Size 4096 Memory SPD ------------------------------------------------------------------------- DIMM # 1 SMBus address 0x50 Memory type DDR2 Module format Regular UDIMM Manufacturer (ID) Corsair (7F7F9E0000000000) Size 1024 MBytes Max bandwidth PC2-6400 (400 MHz) Part number CM2X1024-6400 Manufacturing date Week 23/Year 06n 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 4.0-4-4-13-15 @ 270 MHz JEDEC #2 5.0-5-5-18-22 @ 400 MHz DIMM # 2 SMBus address 0x52 Memory type DDR2 Module format Regular UDIMM Manufacturer (ID) Corsair (7F7F9E0000000000) Size 1024 MBytes Max bandwidth PC2-6400 (400 MHz) Part number CM2X1024-6400 Manufacturing date Week 23/Year 06n 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 4.0-4-4-13-15 @ 270 MHz JEDEC #2 5.0-5-5-18-22 @ 400 MHz How can I make the RAM operate in 400Mhz? Best regards, Stefan. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted August 21, 2009 Corsair Employees Share Posted August 21, 2009 What slots do you have the modules in and did you get the latest BIOS version and then load setup defaults before you set the settings? Link to comment Share on other sites More sharing options...
Yoshimitsu Posted August 24, 2009 Author Share Posted August 24, 2009 Solved it! Found some hidden settings under the "Advance->JumperFree Configuration" page and it appeared when the "AI over clocking"-setting was set to "manual". (If I really took the time studying the motherboard manual...! :roll: ) (I thought I had to change something in the Advance->Chipset- page alter some values for "Configure DRAM Timing by SPD".) The memories are now running as expected. But just to answer your questions RAM Guy: The memories are mounted in slot #1 an #3. I have the lates BIOS, 2801 for the motherboard. After flashing the BIOS, default setting were used for one reboot, then I started changing the values. Thank, RAM Guy, for showing interest. /Stefan Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted August 26, 2009 Corsair Employees Share Posted August 26, 2009 Great and thank you for letting me know! Link to comment Share on other sites More sharing options...
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