New RAM: Memory bus speed exceeds Chipset speed

I'm not quite sure where to post this so I'll try here.

After installing some replacement RAM my computer has begun blue screen crashing regularly, rarely starts up successfully, and according to SiSoftware Sandra:

"Warning 2542 : Memory bus speed exceeds Chipset rated speed. Reduce FSB/memory multiplier."

Could someone assist me with correcting the setting for this please?


Mainboard : Gigabyte EP43-DS3L
BIOS : F9e 09/03/2009
Intel Core2 Quad CPU, Q9650 @ 3.00GHz

Front Side Bus Speed : 4x 333MHz (1.33GHz)
Maximum FSB Speed : 4x 333MHz (1.33GHz)
Memory Bus Speed : 2x 533MHz (1GHz)

Memory Module(s)
Memory Module : Corsair CM2X2048-8500C5D 2GB DIMM DDR2 PC2-8500U DDR2-1066 (5-5-5-18 3-23-6-3)
Memory Module : Corsair CM2X2048-8500C5D 2GB DIMM DDR2 PC2-8500U DDR2-1066 (5-5-5-18 3-23-6-3)

Logical/Chipset Memory Banks
Bank 2 : 1GB DIMM DDR2 5-5-5-15 4-20-9-5 2T
Bank 3 : 1GB DIMM DDR2 5-5-5-15 4-20-9-5 2T
Bank 6 : 1GB DIMM DDR2 5-5-5-15 4-20-9-5 2T
Bank 7 : 1GB DIMM DDR2 5-5-5-15 4-20-9-5 2T
Maximum Installable Memory : 8GB
Memory Bus Speed : 2x 533MHz (1GHz)
Maximum Memory Speed : 2x 400MHz (800MHz)
Multiplier : 16/10x

Video System
Video Adapter : NVIDIA GeForce 9800 GT (112 SM4.0 1.6GHz, 1GB DDR3 2x900MHz, PCIe 2.00 x16)

Computer Memory Controller
Error Correction Capability : None
Maximum Installable Memory : 4GB
Bank0/1 - A0 : Empty
Bank2/3 - A1 : DIMM 2GB/64 @ 800MHz
Bank4/5 - A2 : Empty
Bank6/7 - A3 : DIMM 2GB/64 @ 800MHz

Memory Module (x2)
Manufacturer : Corsair
Model : CM2X2048-8500C5D
Extended Information : mVN
Type : 2GB DIMM DDR2
Technology : 16x(128Mx8)
Speed : PC2-8500U DDR2-1066
Standard Timings : 5-5-5-18 3-23-6-3
Version : 1.02
Memory DC Line : 1.80V
Timing @ 400MHz : 5-5-5-18 3-23-6-3
Timing @ 270MHz : 4-3-3-12 2-15-4-2
Enhanced Performance Profiles : Yes
Profile @ 533MHz: Optimal : 5-5-5-15 X-22-32-X 2T 2.1V
5 answers Last reply
More about memory speed exceeds chipset speed
  1. You should try 2 things

    First I would reset the bios by taking the battery out of the motherboard for a minute or 2.

    Second I would suggest going into the bios and make sure all the Dram settings are set to what the manufacturer says they should be at.
  2. Thank you for your reply.

    There are a few customisations set in the bios that I would be wary about resetting. Everything RAM related appears to be at auto at the moment, and I'm not quite sure what to check..

    (Btw. the memcheck86 showed no errors.)
  3. well you might want to take them off Auto and set them to what corsair says they should be.
  4. I set the DRAM Voltage to 2.1 and its still crashing unfortunately. I'm not sure what else to change from the options available.

    Corsair TWIN2X4096-8500C5D Dominator 4GB 2 X 2GB PC2-8500 1066MHz 240-Pin DDR2 CL5 2.1V Dual Channel Desktop Memory

    I've taken an image of bios options I've got:
  5. I've now got a few 'driver_irql_not_les_or_equal' blue screen errors, one relating to nvlddmkm.sys

    0x000000D1 (0x00000075 0x0000001A 0x00000001 0x94FA0D38)

    and an 'A problem has been detected...'

    0x0000008E (0xC0000005 0x834464A8 0xA0DB399C 0x00000000)

    I tried resetting the bios to default with no effect.

    I have tried setting the Voltage to 2.10V, the (G)MCH Frequency Latch to 333, and the System Memory Multiplier (SPD) to 3.20B as that also relates to 333MHz.

    Still no luck, the computer continues to regularly BSOD :( The machine runs fine with older Crucial Ballistix 2x1GB PC2-5300 DDR2 RAM (BL12864AA663)
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