New RAM: Memory bus speed exceeds Chipset speed Tags: Chipsets DDR2 Bus Speed Memory Motherboards Last response: March 27, 2010 1:18 PM in Motherboards Share DonX March 26, 2010 6:15:49 PM 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? Specification: Mainboard : Gigabyte EP43-DS3L BIOS : F9e 09/03/2009 Intel Core2 Quad CPU, Q9650 @ 3.00GHz Chipset 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 More about : ram memory bus speed exceeds chipset speed saaiello a b } Memory a b V Motherboard March 26, 2010 6:31:46 PM 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. DonX March 26, 2010 6:48:15 PM 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.) Related resources Can MEMTEST86+ check memory running at faster bus speed ? - Forum Should RAM not be faster than CPU front bus speed ? - Forum Regarding the CPU & RAM bus speed - Forum Overclock my RAM bus speed - Forum why does increasing the fsb speed , increase the memory bus ? - Forum Can't find your answer ? Ask ! Get the answer saaiello a b } Memory a b V Motherboard March 26, 2010 7:45:47 PM well you might want to take them off Auto and set them to what corsair says they should be. DonX March 26, 2010 8:13:34 PM 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: http://bit.ly/9ZhA3h DonX March 27, 2010 1:18:15 PM 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) Can't find your answer ? Ask ! Publish Related resources : ForumFront side bus speed vs Ram speed ? ForumMatching Ram with Bus speed ? ForumBus Speed and RAM ForumReal bus speeds of Via 266 chipset and DDR ForumShould memory match bus speed ?? ForumMaximum System Bus Speed ForumQuad Q9550 running at 2,23GHz ( bus speed 266MHz) - how to fix? Forumcpu speed bus ForumNew m/b - old RAM ( bus speed )? ForumP4 Bus speed ? ForumWhats the correct Opteron Bus speed ? ForumPCI bus speed ? ForumSuper Bus Speed Forum"Reboot and select Proper boot device" Forum[Solved] Memory for EVGA X58 Tri-Sli Classified More resources Read discussions in other Motherboards categories BIOS Boot Chipsets ASRock Asus Chaintech DFI Elitegroup FIC Foxconn Gigabyte Intel MSI-Microstar !