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Trying to overclock P5B-E

  • Thread starter Thread starter KK
  • Start date Start date
KK

KK

Lifer
I finally got this setup put together and need to know what setting in BIOS I need to change to get this atleast to 2.8GHz.

I got the P5B-E with an E6300 and some gskill ddr2-800 memory.

Where at do I start

Thanks,
 
Originally posted by: Accord99
Start with these conservative memory timings:

http://i134.photobucket.com/albums/q117/mikepee/NorthBridge.jpg

Make sure to disable Static Read Control

In JumperFree, set your CPU freqency to 400 and DRAM frequency to DDR2-800.

2.8GHz shouldn't require additional CPU voltage, and 400MHz FSB shouldn't require an increase in NB/FSB/chipset voltages.
Click to expand...

with those settings, it will post but not load the operating system.

any other things I should try.
 
You should be trying 401 Mhz FSB, not 400. 400 uses a lower strap, and is much harder to achieve than 401. Also, you'll need to raise your vdimm .1v higher, most likely.
 
Originally posted by: myocardia
You should be trying 401 Mhz FSB, not 400. 400 uses a lower strap, and is much harder to achieve than 401. Also, you'll need to raise your vdimm .1v higher, most likely.
Click to expand...

What do you mean by lower strap? I've mine at 400.
 
Originally posted by: myocardia
You should be trying 401 Mhz FSB, not 400. 400 uses a lower strap, and is much harder to achieve than 401. Also, you'll need to raise your vdimm .1v higher, most likely.
Click to expand...

I have it at 401fsb and it goes thru the post stuff fine, just wont load the operating system. any ideas?
 
You need to possibly increase the voltage on cpu. Try 1.38. That would be a good start. Also the Vdimm should be +.3 higher not +.1.
 
When you say Vdimm should be +.3 since the values start at 1.8 would that be 2.1? Also 2.1V is the highest allowed in bios, and does it matter what the voltage rating on the memory is? I believe this G.Skill is rated for 1.8-2.0.
 
Depending on which set you got I assume they are rated at 2.1. That is the lowest I have seen from G.Skill PC2-6400. It is possible there is 2.0. I would run at 2.0. The bios voltage is not that important. My Asus Striker goes to 3.425v on DDR2 voltage, same for the upcoming Asus Commander 🙂. 2.1v will be easily handled by all dimms.
 
Okay I sett AI Tuning to Manual, CPU FREQ to 401, DRAM Freq to DDR2-802, PCI E Freq to 100, PCI Clock Synch to 33.33mhz, spread spectrum to disable, memory voltage to 2.1, cpu Vcore to 1.387, FSB term volt to 1.3

Set like this it's won't turn on the monitor, I have to unplug the computer press the power button, replug in the computer, then press the power button for it to come back on to get back into BIOS.


Also, if I set everything back to normal pretty much, AI Tuning to Auto, and DRAM FREQ to DDR2-800, in bios it's saying my FSB speed is 1066, I'm not understanding this whole deal. What damn bus is that?
 
Originally posted by: Yoxxy
Depending on which set you got I assume they are rated at 2.1. That is the lowest I have seen from G.Skill PC2-6400. It is possible there is 2.0. I would run at 2.0. The bios voltage is not that important. My Asus Striker goes to 3.425v on DDR2 voltage, same for the upcoming Asus Commander 🙂. 2.1v will be easily handled by all dimms.
Click to expand...

I got this memory.

 
KK, I have the exact same motherboard, memory and CPU as you and I'm able to hit 2.8GHz effortlessly. One thing to keep in mind is that Vdroop on this motherboard is .07V and is pretty high. What this means is that whatever Vcore you set in BIOS, your readings from Windows will be .07V lower.

Your memory voltage is set higher than it needs to be. It only needs 1.9V to run stable at DDR2800 5-5-5-15. Lower it to 1.9V and manually set your RAM timings to 5-5-5-15 in BIOS.

Keep FSB to 401 as myocardia already pointed out.

Set VCore to 1.3625V. When I do this I get between 1.28 and 1.30V reported in CPU-Z and the ASUS AI utility in Windows. That is all I needed to run Orthos small FFT and Blend tests stable for 24 hours.

I included several BIOS settings for you to check below. This is what my board is currently set to. As always with overclocking - your mileage may vary but, this will give you a place to start. If, after confirming your BIOS settings you continue to have issues then run memtest86 for at least an hour. If you get errors with memtest at 5-5-5-15, DDR2800, 1.9V then your memory is most likely defective and is holding back your overclock. If your memory passes memtest86 then try bumping your VCore up in small increments.

Advanced Settings
DRAM Frequency: set it to run 1:1
PCI-E Frequency: 100
PCI Clock Synchronization Mode: lock this in at 33.33MHz
Spread Spectrum: Disabled
CPU VCore Voltage: 1.3625V (It reads 1.28V in Windows)

CPU Configuration:
Modify Ration Support: enabled
Ratio CMOS Setting: 7
C1E Support: disabled
Max CPUID Value Limit: disabled
Vanderpool: disabled
CPU TM Function: Enabled
Execute Disable Bit: Enabled

Northbridge Chipset Config
Mem remap= disabled
dram timing by SPD: disabled
latency: 5
RAS to CAS delay: 5
precharge: 5
activate to precharge: 15
write recovery: 6
DRAM TRFC: 42
 
Originally posted by: Yoxxy
Depending on which set you got I assume they are rated at 2.1. That is the lowest I have seen from G.Skill PC2-6400. It is possible there is 2.0. I would run at 2.0. The bios voltage is not that important. My Asus Striker goes to 3.425v on DDR2 voltage, same for the upcoming Asus Commander 🙂. 2.1v will be easily handled by all dimms.
Click to expand...

Yoxxy, this memory indeed is rated for 1.8-2.0V. I just set mine to 1.9V- right in the middle and it is 24hours Orthos blend stable. I've also seen a few reports over at Xtremesystems where people have good results when this memory is set to 1.9V.
 
Originally posted by: Icepick
KK, I have the exact same motherboard, memory and CPU as you and I'm able to hit 2.8GHz effortlessly. One thing to keep in mind is that Vdroop on this motherboard is .07V and is pretty high. What this means is that whatever Vcore you set in BIOS, your readings from Windows will be .07V lower.

Your memory voltage is set higher than it needs to be. It only needs 1.9V to run stable at DDR2800 5-5-5-15. Lower it to 1.9V and manually set your RAM timings to 5-5-5-15 in BIOS.

Keep FSB to 401 as myocardia already pointed out.

Set VCore to 1.3625V. When I do this I get between 1.28 and 1.30V reported in CPU-Z and the ASUS AI utility in Windows. That is all I needed to run Orthos small FFT and Blend tests stable for 24 hours.

I included several BIOS settings for you to check below. This is what my board is currently set to. As always with overclocking - your mileage may vary but, this will give you a place to start. If, after confirming your BIOS settings you continue to have issues then run memtest86 for at least an hour. If you get errors with memtest at 5-5-5-15, DDR2800, 1.9V then your memory is most likely defective and is holding back your overclock. If your memory passes memtest86 then try bumping your VCore up in small increments.

Advanced Settings
DRAM Frequency: set it to run 1:1
PCI-E Frequency: 100
PCI Clock Synchronization Mode: lock this in at 33.33MHz
Spread Spectrum: Disabled
CPU VCore Voltage: 1.3625V (It reads 1.28V in Windows)

CPU Configuration:
Modify Ration Support: enabled
Ratio CMOS Setting: 7
C1E Support: disabled
Max CPUID Value Limit: disabled
Vanderpool: disabled
CPU TM Function: Enabled
Execute Disable Bit: Enabled

Northbridge Chipset Config
Mem remap= disabled
dram timing by SPD: disabled
latency: 5
RAS to CAS delay: 5
precharge: 5
activate to precharge: 15
write recovery: 6
DRAM TRFC: 42
Click to expand...

when you say set the dram freq to run 1:1 what is that?

Okay, set everything back to default, made all the changes listed above, putting the dram freq to ddr2-802, and the system hangs up when it goes to load windows or it just reboots. any ideas?

I went down from 400 increments of 10 With those settings, I can get it to boot into windows at 350, and ddr2-700, but it bsod inside windows. at 340, ddr2-680 I get some errors in windowsxp. but no bsod yet.

 
Originally posted by: Yoxxy
I think I would download the memtest ISO. It is possible you just have bad ram.
Click to expand...

I'm running this memtest86 right now, so far no problems that I can tell. is there any particular speed I should be running this test at?
 
Just set your memory speed for what it's rated for - 1.9V, 5-5-5-15 and DDR2 800. Make sure it can pass memtest86 at those settings.
 
ok, restarting the memtest at -1.9 5-5-5-15 DDR2 800.

I do appreciate all the help. I'm confused about the freq stuff, under the dram freq, if I move the cpu freq up, the dram freq goes up. so stock 266FSB, I would choose the 3rd option under dram freq which say ddr2-800, but if I up the CPU to 400FSB, then the first option under dram is DDR2-800. what relationship does the cpu and dram have?
 
Ok, I noticed that when I try to boot the computer at 350FSB setting the dram freq at DDr2-700 the memory on post screen says pc4300, should that be saying that?
 
looks like 1.425 Vcore and 2.10 Memory volt seems to be working so far the best. I'm up to 390 and just started taking errors, should I just back it back to 380, stress it using orthos and make sure its stable or should I modify some settings and see if I can make 390 stable?
 
Quick question, on the P5B-E, where do I stick the memory. would both sticks go in bank A or one in A1 and one in B1? My mother just got a dell and I opened it up and they were spread out, and I am like well damn, is that they way they are supposed to be?
 
yeah, I had it 12--. you think that would be the reason I could only hit 370FSB with a memory setting of dimm freq of 740. I won't be able swap them around until I get home.
 
As others here have tried to tell you, you really need to run @ 401 or higher.
AFAIK, all the P5Bs utilize the 1066 chipset strap till 400, & at 401, they switch to the 1600 strap, which is a lot easier on the motherboard.

I don't understand why you are having so many issues, but i too suspect RAM is the culprit.

However, make sure you have bumped up vFSB at least a notch or two (FSB Termination Voltage).
I'd set it to at least 1.3V or 1.4V for now; it can possibly be lowered later

I just helped a good friend of mine OC his P5B-E + E6300, & it was too easy really, so i am a little puzzled by the issues you're having.
 
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