Sign in with
Sign up | Sign in
Your question

ASUS P5N-E SLI 650i choking at 300 FSB

Last response: in Overclocking
Share
January 20, 2007 2:49:13 AM

Here's my setup:

E6300
ASUS P5N-E SLI
2x1GB Crucial Ballistix 4-4-4-12 DDR2 800
eVGA 7900GT Signature Series (600MHz core, 1800MHz memory)
2 SATA drives
DVD-RW
Hauppage WinTV 150
Tuniq Tower
Ultra V Series X-Connect 500W (34A @ +12, but single rail)

I previously had all of this in a P5B-E, and it easily hit 2.4GHz, even with the limited overclocking abilities of that mobo (I also had Corsair 667 RAM at the time).

I thought I built myself a stellar overclocking system, but my system keeps choking when I set the FSB above 300MHz!!! It will post with good settings, but it chokes while attempting to boot Windows (automatically restarts). Any ideas what the problem could be? I can only assume it's the PSU, unless something I bought was faulty when it arrived. Still, everything works fine when I don't mess around with the BIOS.

I tried to use wusy's guide, though it wasn't designed for 650i. I set Vcore to 1.37, Vmem to 2.2, loosened memory timings to 5-5-5-15, disabled all the chipset options, etc., but no dice. I have tried running the FSB and memory in both linked and unlinked modes, but with the same result.

Any help would be GREATLY appreciated. I can get a new PSU, but I was under the impression that a 500W PSU with a solid 34A +12 rail would be sufficient for a non-SLI rig. Not true? Or might the problem be something else?
January 22, 2007 12:51:26 PM

Up vcore .... by 1 or 2 notch.....
Set FSB with UNLINKED
Set Command Rates (RAM) to 2T (at first) to see if problem solve.
Then can set to 1T if needed.
(Also, place RAM in BLACK slots if you want to run @ 1T)
January 26, 2007 11:12:45 AM

Quote:
Up vcore .... by 1 or 2 notch.....
Set FSB with UNLINKED
Set Command Rates (RAM) to 2T (at first) to see if problem solve.
Then can set to 1T if needed.
(Also, place RAM in BLACK slots if you want to run @ 1T)


I tried it, but no luck. Increasing the command rate to 2T helped the system boot at 400 FSB / 800 DDR, but it was still very unstable--I had errors immediately. And that was at 5-5-5-15 timings, not the rated 4-4-4-12.

Also, I swapped my power supply for an Antec NeoHE 550, which should provide plenty of power for my setup. The issues continue (along with some erratic failures to power up, which I understand are due to Antec and ASUS compatibility issues).

I figure it has to be the RAM or the mobo that's limiting my overclock, but both are new components, so I don't know how to isolate the problem. When I set the FSB and RAM to reasonable speeds (i.e., NOT overclocking, just increasing from the default BIOS settings), it will often post, but it usually chokes when the Windows logo comes on the screen.

I have followed wusy's guide to the extent possible, disabling everything in the BIOS that might interfere, and I've bumped up all of the voltages, too. The system is very solid at the default BIOS settings, but that's 266 FSB at 5-5-5-31 timings!

Any thoughts? Is the culprit the RAM or the mobo?
Related resources
January 26, 2007 11:33:28 AM

Up the NB voltage and see if that stabilizes things.
January 26, 2007 11:47:24 AM

I agree with merc. You should have your NB voltage in the 1.5 range. Also try setting your memory to 1:1 ratio (533 mhz) with your processor. I have the same memory you have and had problems with running 5-5-5-15 so I kept it at 4-4-4-12 (strange right?). I have a different board so if you could repost when you fix the problem, I would like to see what you can clock your memory at and have it stable.

thanks

Cappster
January 26, 2007 11:52:36 AM

You probably still need to get your memory voltage up because the ballistic memory requires more voltage than most 2.2V. What voltages are you at now?
January 27, 2007 2:04:14 PM

Turn the Vcore Offset voltage to +.1 or the only option other than auto. That should fix things.
January 27, 2007 4:44:21 PM

I tried everyone's advice, but still no luck (i.e., upping NB voltage, upping mem voltage, setting vcore offset to +.1, etc.). Additionally, since buying the Antec Neo HE 550 PSU, the computer will only power up about once out of ten tries. I tried flashing the BIOS like the Antec rep suggested (apparently there are known compatibility issues between the Neo HE and ASUS boards), but the 0401 BIOS made the computer even MORE unstable. The system still posts, but it is only able to boot Windows about half of the time, and when it does, it's terribly unstable. Two seconds in Prime95 and it chokes. And this is at the default BIOS settings!

So rather than overclocking advice, I just need some troubleshooting help now. I'm going to try to revert to the old BIOS to see if that will improve stability, but I haven't heard of anyone else having stability issues with the new 0401 BIOS. I'm still suspicious that I got a bum mobo. (I would still suspect the RAM, but it passed memtest just fine back when the computer was stable. . .)

Thoughts? Thanks for the help so far. . .
January 27, 2007 4:53:32 PM

Sounds like you need to send your ram back for a new pair.
January 27, 2007 5:31:02 PM

Hi,
Hey that's a nice new mobo, and supposed to support the new 1333FSB too. And you have the latest BIOS, and DDR2-800 memory...?
With all mobo voltage options stock/default, and memory @ default/SPD timings, and memory 1:1 (ie. 266MHz/533DDR) matching the FSB coreclock, with ~2.0V memory voltage setting, it MUST be solid or you have some bad parts.
Antec and Asus incompatibility? Beats me (a PSU is a PSU, right? I mean, how can the mobo tell?)
A nice ATX v/2.2 PSU with 24-pin, 2 x 4-pin (mobo) and 2 x 6-pin (SLI) with 2 x 12V rails supplying ~36A (total) would seem to be required here.
Maybe it's true, your mobo doesn't like that PSU...?
But I would be surprised if even defective DDR2-800 would not run @ 533MHz @ 2.0V @ SPD settings!
I don't suspect your memory but you must get your rig solid (as a rock) at all stock default speeds, at least.
I believe in top-quality PSUs - it's money well spent - and I would investigate this first if I was you.
Let us know,
Regards
January 27, 2007 6:36:26 PM

Well i figured out this motherboard, at least for me.

I have an e6400 and this is my setup (3.2ghz)

CPU Adjustment settings to linked...
Then i have it set to unlinked
Set your FSB to 1600
Ram should be at 732.

Voltage settings:
CPU to 1.35
extra volt option on auto
Ram to 2.08
NB to 1.3xxx

RAM Latency Settings
5-5-5-15 2t

Hope this helps, you can up fsb to pretty much whatever you want. But the ram must stay at 732 even if you increase voltage. This is how it works for me not sure about you.
January 27, 2007 10:10:10 PM

Quote:
Well i figured out this motherboard, at least for me.

I have an e6400 and this is my setup (3.2ghz)

CPU Adjustment settings to linked...
Then i have it set to unlinked
Set your FSB to 1600
Ram should be at 732.

Voltage settings:
CPU to 1.35
extra volt option on auto
Ram to 2.08
NB to 1.3xxx

RAM Latency Settings
5-5-5-15 2t

Hope this helps, you can your fsb to pretty much whatever you want. But the ram must stay at 732 even if you increase voltage. This is how it works for me not sure about you.


I have just tried these settings and it appears that Windows XP will start up but then freeze. Would this instability be solved by increasing voltage on something like the NB, Core or Mem or by backing off thesettings?

My Specs

P5N-E SLI with 0401 Bios
2GB Corsair XMS2 DDR2-800 (5-5-5-12)
E6400 C2D
And an Antec TruPower 420/430 PSU or So
January 27, 2007 10:44:29 PM

well im no pro at o/c this is actually my first time but if windows is unstable try setting your extra volt option to .1
also your should change your memory to 2.1x and as a last resort your nb to 1.5xx

but before you try any of these setting make sure your memory is on the black slots of the mobo
January 27, 2007 10:53:58 PM

I actually lowered the FSB to 1550 and boots up so far to run at 3.10 Ghz.

Stress Testing it now.

Thanks so much for your post, helped me greatly. Now, to figure out what an ideal temp. is under load for it.
January 27, 2007 11:38:18 PM

To report on my problems:

It was the 0401 BIOS that caused the terrible instability I was experiencing at default settings. I tried rolling back to the 0307 BIOS, but that was just as unstable. Back to the release BIOS, 0202, and everything is running fine at default settings. HAS ANYONE ELSE HAD STABILITY ISSUES WITH 0401?

My PSU, the Antec Neo HE 550, is a great one, but for some reason it is still erratic--sometimes it won't power up. It always powers up when cold, however, and once it's running it's fine.

Now for overclocking:

Since the system was unstable at the 1600/800 speeds, I tried running unlinked at 1600/533. I didn't have time to stress test for too long, but it appeared stable. So it looked like the 1600 FSB was okay, and it might be a memory issue. Then I tested at 900/900 with 5-5-5-15 @ 2.2v. No post. And these are 4-4-4-12 Ballistix! Lousy. What I don't understand: memtest and Microsoft memory tester both say this RAM is fine! I just can't clock it at the rated speeds.

Is there any chance that it's the mobo that's limiting my overclock, or does it sound to everyone like the RAM is the culprit?
January 28, 2007 12:17:48 AM

I haven't set my board up yet, waiting on RAM, but from what I have read you need to raise the voltage on the NB to get stability. ALso you need to actively cool both chipsets when overclocking.
January 28, 2007 12:25:57 AM

try my setup (ram at 732),I think this motherboard has some issues with high mhz ram. Mine was made to run at 800mhz but it will only crash.
January 28, 2007 3:51:03 PM

im gonna try these settings, Link dont work for me at all, got 650i mobo, E4300 and 2x1024 corsais xms cl4 4-4-4-12-T2


gonna try it, be back and I´ll tell ya if it worked

*Edit:

that didnt work, Ive had my memory up to 1000 and it started fine...

now I tried 1400 on fsb and 800 on memory and it boots, dont know if its stable though... guess not

raised the voltage on everything.... and changed the timings to
5-5-5-12-T2
running at 350*9=3150

*Edit2:

super pi runs fine, installed TAT so I can see the temps, wont start up, I get a error message... systool the same, u got any other progs u can trust with temps
January 28, 2007 10:50:37 PM

try "core temp" Google it and you can find it
June 10, 2007 3:53:08 AM

Ok I've gotta E6400 on the P5N-E SLI motherboard and at present am at 3450Mhz@34C :)  my settings are FSB 1725mhz Memory is set at 4-4-4-12@ like 815Mhz or something like that give or take 1 mhz *Voltages* for processor are set at auto and Memory voltage is at <2.130V> it's totally stable the trick I'm using is with the case open and the stock heatsink I've got a small box fan type fan blowing on the chip and board CPUS@34C MBs@30-31C Bios Revision is 0401 my Memory of choice is Corsair PC6400 XMS2 2Gbs worth....................NOW my question is this it's running this cool even at 3.45Ghz but if I attempt to run it at say 1800Mhz in Bios or 3.6Ghz Effective or even 1750Mhz Bios 3.5Ghz Effective it just repeatedly reboots what the hell???? it's not running hot at all so what could be causing the constant reboots???? Well I updated to Bios version 0602 and it appears to have stabilized the system and allowed me to run at 3.5Ghz/3500Mhz stabily :) 
a b V Motherboard
a b K Overclocking
June 11, 2007 1:31:22 PM

Quote:
installed TAT so I can see the temps, wont start up, I get a error message... systool the same, u got any other progs u can trust with temps


Same problem with TaT, I use this

http://www.cpuid.com/pcwizard.php
June 18, 2007 10:37:10 PM

:roll: I also have same spec as you:
Intel C2D E6400
P5N-E SLI mobo
Corsair PC6400 XMS2 2x1GB(800Mhz rated)
Ultra Infinity 600W power supply
EVGA GeForce 7600GT 256MB pci-x16
Stable OC at 3.20Ghz@ CPU Temp 54C / Mobo Temp 48C
Temp reading reported by Asus Probe II utility

my settings are FSB unlinked 1600mhz and memory is set at 4-4-4-12-2T @ (2x400Mhz) 800Mhz or something like -/+1 mhz *Voltages*
Memory voltage is set at 1.92V (Corsair recommends these setting for this memory)

This system is stable on 0401 Bios as well as 0602 (April 2007)
I also use the same trick keeping one side of the case open and used the stock heatsink.

I followed the Legion Hardware three ez steps to overclock at FSB 1750 to get 3.5Ghz (http://www.legionhardware.com/document.php?id=625&p=2), but my system freezes. So, I'm currently tweaking FSB and Memory Voltage to get higher OC speed.

I have tried FSB unlinked @ 1720 OC 3.44Ghz and passing Prime95 stress tests up to #5, which raises the CPU temp up to 64-65C and my HD audio keeping getting unpluged after a while(effectively disabling my sound until I reboot again)

1) Do you or anyone have this HD Audio unplugged issue?
2) Is your temp reading of 34C correct with stock fans only? It seems like the room where your system is really cool or you are doing this in the middle of Winter.
!