bustagialla Posted February 19, 2010 Share Posted February 19, 2010 Hi, I have bought 2x2048-8500C5D Corsair Dominator (2 ram modules of 2Gb each) on a Gigabyte GA-MA790FX-DQ6 motherboard with latest firmware installed (version F7E) and an AMD Phenom X4 945 CPU. I tried to activate the AUTO XPRESS EPP MODE (with EPP Voltage Control by EPP) but the system crashes quite every hour. The ram modules work perfectly at 800mhz (in auto setting) without any crash or BSOD. So, I've tried to set manully the RAM values as indicated below, without success: Memory Clock x5.33 1066Mhz DTCs Mode Unganged DDR2 Voltage Control +0.25 (2.10v) CAS# latency 5T RAS to CAS R/W Delay 5T Row Precharge Time 5T (7) Minimum RAS Active Time 15T 1T/2T Command Timing 2T TwTr Command Delay 4T Trfc0 for DIMM1 127.5ns Trfc2 for DIMM1 127.5ns Trfc1 for DIMM1 75ns Trfc3 for DIMM1 75ns Write Recovery Time 8T Precharge Time 3T Row Cycle Time 31T RAS to RAS Delay 4T But I still have many crash. If I get back to the auto settings (800 Mhz) the system works perfectly. I already had 2 Corsair Dominator modules at 800mhz, and I have bought the new 2x2048-8500C5D to upgrade my system at 1066Mhz, so I'd like to run my ram modules at 1066Mhz, to justify the money spent :) Can anyone help me in tuning the right configuration of the ram modules on motherboard's bios? Thanks in advance. Link to comment Share on other sites More sharing options...
bustagialla Posted July 22, 2010 Author Share Posted July 22, 2010 5 months and my problem is still not solved. Can anybody help me? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted July 22, 2010 Corsair Employees Share Posted July 22, 2010 It is possible you are running into a limitation of the memory controller on your processor. Have you tried raising the CPU/NB voltage at all? Link to comment Share on other sites More sharing options...
L4d Posted July 23, 2010 Share Posted July 23, 2010 Add ~ .25 -.5 volt of CPU-NB/IMC. Link to comment Share on other sites More sharing options...
bustagialla Posted July 24, 2010 Author Share Posted July 24, 2010 Add ~ .25 -.5 volt of CPU-NB/IMC. By ~.25 - .5 do you mean from +0.250v to +0.500v, or do you mean from +0.025v to +0.050v? Thanks in advance. It is possible you are running into a limitation of the memory controller on your processor. Have you tried raising the CPU/NB voltage at all? I hadn't tried to raise the CPU/NB voltage at all. I have raised the CPU voltage control to +0.050v 10 minutes ago, with all DRAM settings controlled by EPP, and I'm testing the system. Is it ok or should I raise it much more (to +0.250v or +0.500v)? Where is the NB voltage? I didn't found it. Is it the same that CPU voltage? I have noticed into BIOS only the NorthBridge Frequency, not the NorthBridge voltage. I have just the following items into BIOS regarding the voltage: CPU Voltage Control (the one I have just changed) Chipset Voltage Control HTT Voltage Control HTR Voltage Control Memory Controller Voltage Thanks for your help. EDIT: I have raised the CPU voltage control to +0.050v but the system has crashed. Then I've adeed the increase of the Chipset Voltage by + 0.10v, but the system has crashed again. So I've added the increase of the HTT Voltage Control too by + 0.10v, but the system still crashes. Which value should I still change? Should I do further increases of the CPU voltage? Which values? Link to comment Share on other sites More sharing options...
L4d Posted July 24, 2010 Share Posted July 24, 2010 Sorry for not adding a zero before; I meant .025-.05. I feel I needed voltage of at least .025 and I use .05 with 2200 NB or 11x multiplier. Link to comment Share on other sites More sharing options...
L4d Posted December 11, 2010 Share Posted December 11, 2010 I now use +.075 voltage with my 720BE (C2 revision) CPU's IMC @ 2.2ghz. My motherboard is a GA-MA78LM-S2H, and it has but three phases and a four pin CPU power connection, so my .75 voltage might be .25 voltage higher than a board with more phases and an eight pin CPU power connection. Also, I cannot run my RAM, which is the same as yours, at 1066 either, and I checked the sub-timing differences between my Foxconn A7DA-S and mine, to see that my Gigabyte one uses much tighter timings, so that might be another restricting factor. Link to comment Share on other sites More sharing options...
Masacka Posted December 22, 2010 Share Posted December 22, 2010 Hi, I have the same system MA790FX DQ6 and 4xCM2X2048-8500C5 CPU AMD 940X4. Bios F6 Is there a solution now running at 4 to 1066 Rams leave? Greetings Masacka Link to comment Share on other sites More sharing options...
bustagialla Posted December 23, 2010 Author Share Posted December 23, 2010 I still haven't found a solution, and my system still runs at 800mhz instead of 1066mhz :(: Furthermore I have just 2 ram modules, so I don't think that makes any difference running 2 or 4 modules, the system crashes at 1066mhz. Link to comment Share on other sites More sharing options...
Masacka Posted December 23, 2010 Share Posted December 23, 2010 2 modules had no problems at 1066 on the run. It had manual set. Ram voltage +0.20 ie 2.05 v timings 5-5-5-15. I have Bios F6, which Bios you have? http://s7.directupload.net/images/101223/temp/9b25xbxi.jpg Link to comment Share on other sites More sharing options...
bustagialla Posted December 25, 2010 Author Share Posted December 25, 2010 I've just tried your settings (2,05v and 5-5-5-15) and the system has crashed. I have last BIOS version (F7G). My ram modules are recommended to run at 2.1v. Any idea? Thanks. Link to comment Share on other sites More sharing options...
Masacka Posted December 27, 2010 Share Posted December 27, 2010 I make a pic of my BIOS settings. Of course you can give more excitement instead of +0.20 v +0.25 v then get the Dimms v. 2.10 .Get tomorrow times nor the other two test install and whether they run every 4 to 533rd. Greetings Masacka Link to comment Share on other sites More sharing options...
Masacka Posted December 29, 2010 Share Posted December 29, 2010 http://s13.directupload.net/images/101229/temp/444p49at.jpg http://s1.directupload.net/images/101229/temp/qa4jq228.jpg http://s3.directupload.net/images/101229/temp/ncscv8uh.jpg http://s5.directupload.net/images/101229/temp/58y2257c.jpg Link to comment Share on other sites More sharing options...
bustagialla Posted January 7, 2011 Author Share Posted January 7, 2011 Hi Masacka, I've tried your settings but my pc still crashes at 1066mhz. Maybe it's a BIOS problem, due to the fact that I use a beta bios version. Thanks anyway for your help and your kindness. Link to comment Share on other sites More sharing options...
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