If you read over the previous few pages, I think you'll find that the 45nm chips need some GTL adjustment (depending on which BIOS you have loaded).
If you read over the previous few pages, I think you'll find that the 45nm chips need some GTL adjustment (depending on which BIOS you have loaded).
Ok. I'll read back a bit. My fsb wall on the previous Asus P5K-E was 508Mhz with 24C ambient temps.
I can't go over 480fsb with this mobo using:
CPU vcore - 1.5v
VID add - auto
Dram v - 2.35v
SB - 1.150v
CPU PLL - 1.55v
NB - 1.65v
CPU VTT - 1.45v
DRAM speed - 333/667 1:1
PCIE - 100mhz
Pci scot - 1x 1x (wtf is this? :))
Ram - 5-5-5-15, everything else (loads of things) are on Auto
Spread spectrum's - disabled
Everything else was on default settings, including GTL's. I'm guessing this is a GTL problem? Board can't max out at 480 on the voltages i gave it IMO.
EDIT: nevermind, it was the GTL's. Set them at 60/60/60 and maxed out at 530fsb. So that's 20 more the Asus with a closed case. I've tested my ram previously at it craps out at 525/530 or so (loads of memtest errors) so i'll test maxfsb when i get some better ram. Now i just got to find what GTL's i need to be able to run 4000 @ 1.32v.
:(Trying a higher voltage on NB didn't change anything. I enabled vDroop in BIOS, and it got rid of the erratic boot issue as I got CLOSE to 1.400 vCore in BIOS, but once I set things at 1.400 in BIOS it stall fails to post with C1 showing.Quote:
Originally Posted by kberguy1
I am now working on getting the maximum stable FSB with an 8 x multiplier. I figure if I can't increase my OC speed due to the voltage issue, I can at least maximize memory performance to get a more balanced result.
Just wanted to post some update on 65nm C2D's for ones still on them,:D i just got my E6750 on 3.76GHz 24/7 stable Orthos stability on this imba DFI mobo, on not so bad, 1.47V. :up: There is still some muscle left in this old girl.:cool: Not for the junkyard after all.
Still tesing, hope to get as much mhz as possible for 24/7 on comfortable voltage.
To be honest those "old" 65nm chips are still pretty awesome to say the least! Especially the E6750 and E6850 which clock like crazy and run cooler than my E8400 does! By the way Mad_Skills what strap/divider are you running right now when your CPU is running at 3.76Ghz? Also are you running with GTL's enabled/disabled?
@Roger_D25 Yes, i've seen some bad E8400 in the beginning but the situation seems to be improving a bit.
But i reckon there is no need for me to swap to 45nm still, not with this lady going wild. :)
To be honest, the last bios 12/24 helped me a lot. I, for some reason, couldn't crack 3.7GHz with old 11/07 bios on much higher voltages than now, but the new bios helped me a lot, i love this DFI much more everyday. Begin to think that, as far as bios is concerned, Asus BLITZ is a different league.:D
I'm using 5:6 strap for the memory, which is 333/800 1333MHz chipset strap with my Dominators running on 1130MHz @2.23V for 24/7. Very cool and not so bad.
Temperatures are 33C idle and 66,67C at full load with a bit high ambiental at around 23-25C.
I use 111 value for all GTL settings, so 1 increase over the default 110.
What brings my joy up is that i see people using 1.5V or even 1.55V for 24/7 on 3.6GHz so i hope that i will get 3.8GHz at least before reaching 1.5V, i'm still testing.
Before throwing in the E8400 I was having a blast with my E6850. The highest I got it for stable 24/7 use was 3.825Ghz on 1.425v (BIOS Setting Value) also running the 333/800 strap with RAM at 1020Mhz on 2.19v (actual 2.06v). At the moment I've got the E8400 at the same exact settings except for much lower vcore at 1.175v (actual closer to 1.95v though). Oddly enough my E8400 runs quite a bit warmer though (but I think that is just the "issue" some people are having, then again it might just run hotter than the E6850 does)?
By the way are you running a Blitz? I only ask because you mentioned it in your post above?
I was reckoning on doing the same since i thought that my cpu wouldn't do good, but since the new bios revived it i won't swap to dual core 45nm, perhaps Q9450 when i get the money.
Also E6850 seem to need less voltage overall than the E6750 for higher clocks.
My temps are ok since my ambientals are a bit high..
I mentioned the Blitz 'cause i tried it at my friend's and i hated the bios, while i adore the one DFI has. :)
I asked because I sold my Maximus (need to update signiture) and bought a Blitz Extreme, hope the BIOS isn't all that bad!
Yeah, you need an update. :D
I didn't mean that the Blitz has a bad bios(that would be an insane statement :D), i just didn't like it 'cause i like to tweak a lot and Biltz's bios is a bit easier to tune and play with.
Don't worry you've got hell of a mobo:up: , i just prefer DFI.
I totally understand, that is one of the main reasons I went with DFI in the first place! Plus I'm going to hold onto my current board just incase I can't get anywhere with the Blitz.
You can't go wrong with either of them, that's for sure.:D
:up:
which bios is the best for E8x00 cpus ?
latest beta 09/01/08
however I would set VTT <1.15 and GTL's manually set 63/63/67
No specific reason. Just using stock settings on these to keep safe
Anyone tried the 12/24 Bios on the 45nm cpu's ?
Anyone know how Anand figured that GTL's should be at 67% of VTT for 65Nm CPU's? I'm running my e8500 at only 44% (60 gtl's, 1.36v VTT) GTL's and getting better results, stability wise, then setting them at 67%. I was wondering how they came up with that 67% so we could pinpoint the correct % for Wolfies.
The 67% ratio in the article is part of Intel's AGTL+ specification. It states that VTT is to be derived from a separate circuit on the motherboard and GTL should be held at 67% of that value. It appears that 45nm specifications are at the 63% value.
Not sure how you are arriving at a 44% value in your example. 1.36VTT x 44% = .60V rounded up. However, selecting a value of 60 for GTL is an arbitrary number that by itself means nothing. Unless you have physically measured VTT and the correct CPU GTL you don't have any idea what percentage of VTT the GTL is set to when choosing a value of 60.
Praz,
I would happily take your word for it but how did you arrive at 45nm chips being happy at a 63% value? This is exactly the information I've been wanting to find but haven't had much luck! Although I've been trying my best to stay up to date in this thread I occationally forget stuff that I've read, even only one page back! What I'm getting at here is I'm sorry if you have already posted that info somewhere, just tell me to shut up, lol!
I forgot to ask you earlier but where exactly are you reading actual vcore from on the board? I have only found one decent resource for reading voltages on this board and it only list "CPU GLT", "VTT", and "CPU PLL" voltages? Thanks for your help!Quote:
Originally Posted by Praz
Measuring default CPU GTL voltages on various boards show the manufacturers using 63%. When settings are manually entered, close to 63% also brings the best stability with the least amount of voltage. NB is still at 67%.
Measure VCORE along the common side of the inductor pack. That's the side closest to the CPU socket.
Excellent Praz, thanks for posting that information! By trial and error I had been using the inductor pack but didn't know if that was an accurate location to read actual CPU voltage so thanks for verifying!
I didn't quite get this.
Say your cpu vcore is 1.5V, NB voltage is 1.4V, there are 3 settings for the GTL, how do you calculate each one, the third is for the NB, but the first two are for the cpu i think. How do you manage to know what is the most correct value, 65% of what?
It's for the 65nm, though i do not know what is stated for 65nm cpu's VTT settings.
Although its not rocket science there is some calculation to correctly tuning GTL's in general (what I mean to say is that it is something that can be calculated, there doesn't need to be any guess work done). I am certainly no expert by any stretch but there are resources out there explaining how to do this. A good place to start is a website called edgeofstability which is basically devoted to the DFI P35! By the way does anyone know the member here who put that information together, I always forget?
This board is really fun to use! :up:
It is a secret and ain't supposed be told...the naughty monkey will get you...:yepp:Quote:
Originally Posted by Roger_D25
Ahh, now I remember! Let me mention once again what a great resource that is!