Wunjaybee Posted June 22, 2009 Share Posted June 22, 2009 Apologies for any missing information this is my first pc build and my first post.... I am attempting to get 8Gb (4 * 2Gb) of memory (Corsair TwinX DDR2 XMS2, PC2-8500) running at the speed of 1066 MHz with the default latency settings of 5-5-5-15-2T as per corsairs EPP settings specified here, without success. Whenever I try setting the DRAM Frequency to this speed (Or even a lower speed such as 999) the pc fails to post with an overclock error. I haven't tried tweaking many of the bios settings as I don't know enough about what I'm doing :): however I have increased the DDR Voltage to +0.250 and in the bios the DDR Voltage then read 2.128V which is above the amount specified in corsair testing at 1066. I would very much appreciate advice on what other settings I need to change and by how much. The CPU Frequency setting is currently 333 and I'm trying to set the DRAM frequency to 1065. The bios voltage configuration is as follows (All settings are at default apart from the DDR Voltage and Chipset Voltage): CPU Voltage: [Auto] DDR Voltage: [0.250] <- Increased from auto Chipset: [0.025] <- Increasedf from auto NB PLL Voltage: [Auto] FSB Voltage: [Auto] CPU Core1, 2 GTL Ref Voltage: [0.63 * VTT] CPU Core 2 GTL Ref Voltage: [0.67 * VTT] MCH GTL Ref Voltage: [Auto] CPU PLL Voltage: [1.5] The voltages displayed in the bios voltage configuration are as follows: CPU: 1.376 NB/SB: 1.160 DDR: 2.128 FSB: 1.272 And the voltages taken from hardware monitor are as follows: Voltage sensor 0 3.33 Volts [0xD0] (+3.3V) Voltage sensor 1 1.38 Volts [0xAC] (CPU VCORE) Voltage sensor 2 2.32 Volts [0x91] (VIN2) Voltage sensor 3 0.11 Volts [0x9] (VIN3) Voltage sensor 4 5.59 Volts [0x85] (+5V) Voltage sensor 5 11.70 Volts [0x85] (+12V) Voltage sensor 6 2.54 Volts [0x9F] (VIN6) Voltage sensor 7 3.33 Volts [0xD0] (VSB3V) Voltage sensor 8 3.46 Volts [0xD8] (VBAT) Thanks in advance! Link to comment Share on other sites More sharing options...
Wired Posted June 22, 2009 Share Posted June 22, 2009 Try 800 Mhz. You may be hitting the max of the motherboard's memory controller. Note that Corsair hasn't tested those 2 pairs together, so there's no guarantee from them either that 2 pairs will hit 1066. Could be mixing different ICs for example. Link to comment Share on other sites More sharing options...
Wunjaybee Posted June 22, 2009 Author Share Posted June 22, 2009 Sorry I should have made it clear that at 800 MHz it works. According to the biostar website the motherboard supports speeds up to 1200 and so hopefully it should be possible to achieve 1066. Link to comment Share on other sites More sharing options...
Wired Posted June 22, 2009 Share Posted June 22, 2009 The key is if they officially support that speed with all slots full. They generally don't state that. Link to comment Share on other sites More sharing options...
Wunjaybee Posted June 22, 2009 Author Share Posted June 22, 2009 I have just emailed biostar to confirm that 1066MHz is achievable with all 4 slots occupied so we'll what they come back with. Link to comment Share on other sites More sharing options...
Yellowbeard Posted June 23, 2009 Share Posted June 23, 2009 If it's going to run more DDR800, you'll likely need approximately 1.3v - 1.4v on the memory controller to do it. Also, make sure your memory controller aka chipset aka NB aka North Bridge is well cooled. Link to comment Share on other sites More sharing options...
Wunjaybee Posted June 25, 2009 Author Share Posted June 25, 2009 Thanks for the update :) The NB has a heatsink+fan installed and so hopefully raising the voltage will be okay. Later today when I have time I will try to increase the NB and see if I can increase the memory speed. Previously to increase the NB voltage I have been increasing the setting named "chipset" within the voltage settings. I can see that this does increase the NB/SB voltage however have a couple of question if anyknow can help. I've tried google to see if I can find an answer but couldn't find anything (that I could understand anyway)... What does the setting "NB PLL voltage" do, and when should it be adjusted? I tried increasing it to see if the NB voltage increased but it didn't. Also is it okay to increase the "chipset" voltage to give an increase to both the NB and the SB? The NB has addtionally cooling etc but the SB does not. Cheers. Link to comment Share on other sites More sharing options...
Wunjaybee Posted June 25, 2009 Author Share Posted June 25, 2009 I tried increasing the NB voltage to 1.35 and DDR voltage to 2.128 and trying the memory at a lesser speed of 999 MHz however this fails to boot. Not sure if I should keep increasing the NB voltage of if I need to look to other bios settings. Link to comment Share on other sites More sharing options...
Yellowbeard Posted June 25, 2009 Share Posted June 25, 2009 Try those settings and start at DDR800. If it boots and is stable, work your way up from there. Link to comment Share on other sites More sharing options...
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