DDR2 800 (pc2 6400) clocking lower then 400mhz

My System

* Case - Rosewill R214P-BLK Black SGCC Steel ATX Mid Tower Computer Case (1 exhaust fan, 1 front fan)
* MotherBoard - Gigabyte M57SLI-S4
* CPU - AMD Athlon 64 X2 5000+ Brisbane (Over clocked to 3.0ghz Multiplier 15x, Voltage 1.35)
* CPU Cooler/Heatsink - Rosewill RCX-Z940-SL 92mm 2 Ball CPU Cooler
* Ram - 2 mushkin 1GB 240-Pin DDR2 SDRAM DDR2 800 Dual Channel, 2 OCZ 2 GB 240 - pin DDR2 SLI-Ready Special edition on bank 2 (total of 6 Gigs)
* Video Card - GeForce 9600GT 512MB 128-bit GDDR3 PCI Express x16
* Operating System - Windows Vista x64
* DvD Rom - ASUS 20X DVD±R DVD Burner with LightScribe Black SATA
* Hard Drive - Seagate Barracuda 320 GB SATA
* Power Supply - APEVIA ATX-AS680W-BL 680W

Q: I currently have two sticks of 512mb pc3200 memory in DIMM 1 and 3 to reach the performance of dual channel DDR. Can I also add two sticks of 256mb PC3200 in dimm's 2 and 4 to reach 1.5GB of ram and still maintain dual channel performance?
A: As long as you have matched memory pairs on each channel, you should be able to run dual channel.

The only potential problem: Because you are using 4 memory modules, which require more power, your system may clock the speed of the modules down to maintain stability.

The quote above was in the memory faqs sticky post and i put 2 1GB sticks in memory bank 1 and 2 2GB sticks in memory bank 2. It detects the amount of ram i have correctly but its not detecting the mhz correctly its suppose to be running at 376MHZ but instead its running at 334 MHZ. How do i give it more power so that it could maintain its stablility with it running the proper Clock?
5 answers Last reply
More about ddr2 6400 clocking lower 400mhz
  1. in bios you can do hopefully some things like upping the voltage, chaning the ram ratio or loosening the timings, the combination of all or one of these should help you out. 334 mhz sounds like it's set at different ratio than 1:2, which would give you 400mhz. sounds like you have it at 1:1.66. mobo could be downclocking the ram because of lack of voltage, or bad timing settings.
  2. So it set your RAM down to DDR2 667 speeds. Ok, thats a fairly easy fix, with the exception that you are using mixed pairs of RAM that probably run with different timings.

    I think your RAM divider is set to 9. That is, CPU speed/divider = RAM speed. So 3000mhz/9 = 333mhz. If you can set your divider to 8 in your BIOS, you would get 3000/8 = 375mhz.
  3. Right now my FSB speed is set to 200 and ratio is at 15
    i don't know how to change my divider =P. Can anyone help me with that?
  4. It should be somewhere in your RAM options in the BIOS.
  5. 200mhz is the bus speed, 15x is the cpu multiplier. memory ratios should be under the ram or overclocking. i'm not too familiar with this model of mobo
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