Q9*40 and X33*0 C1 FSB Problems.

[FiXeR]

I have a Xeon X3360 and it doesn't go over 445Mhz FSB. No matter what I try.

I'm not the only one with FSB problems, I think the new C1 stepping isnt so good as the C0. Most X33*0 chips won't get over 450Mhz FSB.

Who has this problem to? What's your limit FSB? And what batch do you have?

Mine:

Chip: X3360
Batch: L803A762
Max FSB: 445Mhz
Motherboard: Asus Rampage Formula

[Xilikon]

Let's chime mine :

Chip : Q9450
Batch : L811A506
Max FSB : 440 MHz (quick test, further testing tonight to find the real max FSB).
Motherboard : Maximus Formula (Rampage Formula 0308 BIOS).

[Hyperhorn]

Tried on P965-mainboard?
My Q9300(ES) doesn't boot into Windows @450 Mhz FSB on Gigabyte P35-DS3, but ist benchstable on Asus P5B @ 480 Mhz + x.

[X2beach]

I was having the issue.. Until I tweak my GTL which took me 2 weeks.. If I can help let me know

[Xilikon]

I was having the issue.. Until I tweak my GTL which took me 2 weeks.. If I can help let me know

Which GTL did you tweak and what is your value ? That's my own guess to explain why most guys is struck at that FSB while a old P5B can work fine and P5E-VM too...

[FiXeR]

I was having the issue.. Until I tweak my GTL which took me 2 weeks.. If I can help let me know

Can you explain your tweak? I think a lot people have this problem and this could solve it!

[ChaosMinionX]

Maybe it really is a GTL problem thats holding these chips back?

[X2beach]

I am running 1.4 vcore 1.4 CPU VTT 140 130 125 GTL 1.64 CPU PLL

I am at work. I will be happy to help more in about 2hr when I get home

[RunawayPrisoner]

Maybe it really is a GTL problem thats holding these chips back?

Some boards already have their GTL values tweaked so well when they were engineered that they don't need to be hand-tweaked to achieve such insane clocks. Maybe that explains why some boards just work better with these chips than others.

[Xilikon]

I googled about GTL voltage adjustement and so far, it seems that it's specific to each CPU and no 2 settings is the same. You should tweak yourself and that's what I plan to do...

x2Beach use a DFI X48-TR2 board so the settings is not the same as a Maximus/Rampage board so it's hard.

RunawayPrisoner is right, some have better inhouse tweakings than others. I guess it's not impossible that future BIOS updates improve the compatibility with those processors by tweaking the default GTL values.

[jas420221]

is this issue limited to the X38/48 chipsets? No problems what so ever here on a "ty" 780i!

[RunawayPrisoner]

But 450 FSB is hardly... "it." I mean... I could get 3.8GHz with the kind of volt you're using for 3.6! Come on, let's see some higher numbers at lower volts!

(But I'm one to talk... if the computer is stable at 4.0GHz at below 1.45v vCore, I may just keep it! )

[ChaosMinionX]

The more I read, the more I think its the X38/X48, specifically the Asus boards, because I see good things with the DFI boards, and not so good with Asus.... either its chipset, or because the BIOS just simply isnt mature enough to handle these chips.

[RunawayPrisoner]

Actually, I've heard all kinds of boards achieving an average of 440-460 in the X3350 arrival thread. It's not specific to X38/X48 boards, and definitely not specific to ASUS boards.

[jas420221]

But 450 FSB is hardly... "it." I mean... I could get 3.8GHz with the kind of volt you're using for 3.6! Come on, let's see some higher numbers at lower volts!

(But I'm one to talk... if the computer is stable at 4.0GHz at below 1.45v vCore, I may just keep it! )

Well, put it this way, I have a lot to learn. My last overclocking adventure was a A64 3200+ I had a 2.9Ghz. I had an e8400 for a while, but didnt need to touch GTLvref.

I dont know what is holding this thing back. I just know those volts are stable at this clockspeed. I just dont think this is a 'cherry' chip in all reality.

[sbinh]

1 of my Q9450 (C1) on P5K-Dlx can run at 450 (FSB) and is stable at 3.6GHz (with low vcore = 1.25v in BIOS) ... temps are good too (full loaded - 56*C in CoreTemp and 46*C in RealTemp)




The another one is "suck" ... on Abit IP35-Pro. It is only stable when vcore is set to 1.29v at FSB=425 (3.4GHz) and temparature are super HOT .... (full loaded - 68*C in CoreTemp and 58*C in RealTemp) .....

[RunawayPrisoner]

1.224v seems about right. I got that same result with the X3350.

Well, put it this way, I have a lot to learn. My last overclocking adventure was a A64 3200+ I had a 2.9Ghz. I had an e8400 for a while, but didnt need to touch GTLvref.

I dont know what is holding this thing back. I just know those volts are stable at this clockspeed. I just dont think this is a 'cherry' chip in all reality.

I don't even think that my two 4GHz chips are 'cherry'.

[jas420221]

Well if others in the Q9450 thread had a 780i board, that would help me out a lot in finding some settings with lower volts. But from what I have seen, this is about right. I can boot 3.8Ghz @ 1.35v, but didnt do any stability testing.

EDIT: And is it just me or is the title messed up?

Q9x50 and 3x50.

[X2beach]

I think there are other things to consider also.. Video card for some reason makes a difference, 9800gx2 draw alot of juice and I was having my computer just shut off, I have OCZ 1010 Powersupply, found out I was overloading one of the rails. so I am getting a single rail Powersupply now.

DFI board do have more options to tweak thats forsure. My buddy has a X3360 on a rampage and he running into the same issues. He doesnt have GTL tweaks and can'nt run at 450bus

[Hamilton]

I'm running a Q9450(ES) C0 on a DFI X38-T2R that's cooled by a Vapo LS and I'm hitting my max FSB around 450-455. Still tweaking the GTLs to see if I might get it a little higher...
But I had to really crank the CPU VTT and NB Core voltages to get where I am.
Currently running CPU VTT 1.603V, NB 1.677V, GTLs 120, 120, 120.

[FiXeR]

If I understand it right you can tweak the GTL Voltage and can get a higer FSB?

I've found some information.
http://www.thetechrepository.com/showthread.php?t=87

Maybe can somebody find a GTL pinmod or motherboard mod. (I'm just curious if it's possible, it wil be a revolution on the Q9*50 overclocking scene)

[jas420221]

I read that. Though most of it is over my head. I have those options on my 780i board (P04 Bios).

It almost seems though from that other thread and this, with the small cross section we have, that its a X38/48 issue as Im sure I can plow through 450FSB with the right amount of volts.

[RunawayPrisoner]

Oh shoot... I remember it now. GTL may not play a role in the FSB wall after all...

Article:
http://www.edgeofstability.com/artic.../gtl/gtl1.html

What GTL might actually do... is it lets you stay stable at lower voltages from what I've read so far. If that proves true... guhh... then the real problem may lie in the electrical design of the board, in which case, not even a BIOS update would help.

[biftek.]

I'm still thinking it's just immature BIOSes (at least for the x38/48 boards)

Although it's not of any relevance, on my M2N SLI deluxe, a bios update gave me an extra 200mhz OC fro 3.0 to 3.2.

I've seen bioses unlock ocing potential and I wouldn't doubt this is the case for the 45nm quads.

[FiXeR]

I've tried an Asus P5E bios and the Rampage Formula bioses. Both aren't a difference is OC percentage.