mattbuck Posted March 24, 2009 Share Posted March 24, 2009 Ok i have just added another 2 gig of Corsair DDR2 800mhz to my system take it up to 4 gigs in total on vista 64. Before i was running my cpu (e6750) at 3.4ghz and the mem at 850mhz. I did not touch spd settings, just used my asus p5w dh bios for basic overclocking. However upon install of the extra ram i kept getting crashes. After some research i realised that i had to lower the ram speed. Currently i have it set to 650mhz, i have not touched the spd settings. I am ideally wanting it to run at 667mhz, and i would like to adjust the spd settings, but anytime i make a change i get crashes. My CPU is now at 3.45 ghz with the ram at 650mhz, i cannot really push my cpu any further without going higher on the volts, i am currently at 1.425 load temp is 28-32, full load cany vary depending on room temp. But with prime05 it goes up to 50-52, when summer arrives that will shoot up a bit so i am at or near the max i can push the cpu. I am not vastly experienced at overclocking, but ideally i want 3.4-3.5ghz on the cpu, and 667mhz on the memory with good timings. Full specs in profile as requested. Help please. :) Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted March 24, 2009 Corsair Employees Share Posted March 24, 2009 If you are unstable running 4 modules, you may need to increase the voltage to the memory controller 1-4 steps above the stock setting. Link to comment Share on other sites More sharing options...
mattbuck Posted March 24, 2009 Author Share Posted March 24, 2009 So would it be safe to run the memory at 800mhz if i up the memory volts? Is that what you mean? Not sure how i up the volts on the memory controller. Link to comment Share on other sites More sharing options...
DerekT Posted March 24, 2009 Share Posted March 24, 2009 It's a dice throw and is dependent on the memory controller, not the memory. Some make the grade in long term stability. Some make the grade in shorter term stability and bring damage to the memory controller in longer term. Some do not make the grade at all. Rather than take a chance on short term stability and longer term damage, I recommend a drop to 667Mhz. But it's your memory and your choice. Keep in mind that the damage to the memory controller is at the motherboard level and will require an RMA (if still in warranty) of the motherboard if you end up with damage to the memory controller. This can show up in an inability to run at 800 anymore. An inability to run in Dual Channel mode anymore and/or an inability to run certain slots. My advice for long term stability? Increase the voltage of the MCH on your board to 1.55v and lower your DRAM speed to 667Mhz. So would it be safe to run the memory at 800mhz if i up the memory volts? Is that what you mean? Not sure how i up the volts on the memory controller. Link to comment Share on other sites More sharing options...
mattbuck Posted March 25, 2009 Author Share Posted March 25, 2009 Thank you i will try this. Could you suggest timings for me please? I am useless at that stuff. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted March 25, 2009 Corsair Employees Share Posted March 25, 2009 What is the exact part number of the modules? You will want to use the tested setting but if your over clocking I would try the SPD settings for the timings. Most likely Cas 5-5-5-18. Link to comment Share on other sites More sharing options...
DerekT Posted March 25, 2009 Share Posted March 25, 2009 Your overclock will change things a bit. Download Memtest Version 2.11 from--->Here.and extract the ISO image. Burn the ISO image to an CD-ROM disk. Download CPU-z from Here .Please Enter your BIOS and set to these values, save and shut down.Try these settings:Configure System Frequency/Voltage AI Overclocking = Manual CPU Frequency = 425 DRAM Frequency = 667MHz (or the closest value) Performance Mode = Auto PCI Express Frequency = 100 PCI Clock Synchronization Mode = 33.33 Memory Voltage = 2.1v CPU Core Voltage = Auto FSB Termination Voltage = Auto MCH Chipset Voltage = 1.65v ICH Chipset Voltage = Auto Advanced Chipset Settings Configure DRAM by SPD = Disabled DRAM CAS# Latency = 5 DRAM RAS# Prechardge = 5 DRAM RAs# to CAS# Delay = 5 DRAM RAS# Activate to Precharge: 15 DRAM Write recovery Time = 6Leave all else on AUTO settings. Boot to the CD and allow a few passes. If stable, enter Windows and please post screenshots of CPU-z's CPU, Memory and SPD tabs. Link to comment Share on other sites More sharing options...
mattbuck Posted March 25, 2009 Author Share Posted March 25, 2009 Wow, thanks for the replies. Getting late now but ill try this first thing tomorrow and post back with results. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted March 27, 2009 Corsair Employees Share Posted March 27, 2009 Yes please do let us know! Link to comment Share on other sites More sharing options...
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