Vmch = voltage of memory controller hub, basically it supports the mem and vid buses, ie. lets cpu, mem, vid communicate. Yeah check your nb temps, I try and keep below 60C. Unless you have stability issues you don’t need to mess with it.
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Vmch = voltage of memory controller hub, basically it supports the mem and vid buses, ie. lets cpu, mem, vid communicate. Yeah check your nb temps, I try and keep below 60C. Unless you have stability issues you don’t need to mess with it.
Quote:
Originally Posted by Eldonko
i have issues yes, above 500fsb...but i donīt know what value to put there(without the risk of killing it), and i donīt know how to check the temp...
Regards
Try 1.4v first. Any temp monitoring program will tell you the nb temp, like asus probe, speedfan etc.
Vascorama - You cant trust bios you need to measure it with a dmm. 1.375v is intel's rated absolute maximum. I had to hard-mod my board i have no bios option for vMCH on my rev 1.03G.
Im trying to decide if i should go over the rated absolute maximum for P965.... i have seen people running ~1.87v on the P965 with stock passive heatsink one guy with a DS3 burnt his NB at that voltage it was at 120*C PC locked & never posted again. (The DS3 1.55v setting = 1.87v real).
Thing is i raised it from 1.29v to 1.36v & cannot raise FSB any more, and +0.07 volts should have let me go up a bit if my chip could do it. I can however run static read on "faster" @ 490 FSB, which it wouldnt post at before mod.
Yay bench stable @ 500 FSB! :up:
I have been doing some 4:5 divider testing and am quite surprised @ 1.44 vNB i got 460 FSB and at 1.51 vNB i got 470 FSB. Theres still more in it, these boards are fun :D
I can PI 1mb too at 2040fsb(no vmods):
http://s2.simpload.com/th_082846d46469a108e.jpg
too bad my cpu multi is 7, if it was 9...my cpu would be around 4600mhz(if he could make it of course), at 460 fsb, it´s rock stable(orthos 8 hours, vcore @1.365 bios/1.320 cpu-z..), it´s a great board yes, but for those with high cpu multi´s...or unlocked :p:
haha this post is still alive ? :D
Off the record, I changed my board for a P5B Premium Vista Ed. Much better overclocker than my old P5B. (which was pictured on the first post) The P5B really didn't liked my OCZ Memory.
My vanilla is better than both deluxe I had (and killed) for FSB. Just comes to luck I think.
I have seen P5B Deluxe's max out under 500 FSB, and not be able to do 460 FSB with the 4:5 divider. My vanilla is challenging Deluxe's, Commando, P965-S, AB-9 and DQ6 results.Quote:
Originally Posted by Eldonko
Eldonko/Vascorama/Vric - what is your max FSB using 4:5 divider? and what vNB for that?
I cant remember TBH, board has been sitting here for months. I'll have to fire it up soon.
havenīt tested yet, my cpu is E6550(1333, multi 7) so in order to use 4:5 i needed other ram that my own(gskill pk).Quote:
Originally Posted by Timbosan
Iīm thinking in changing to a p5kc to see if i can clock my cpu higher, low multis suck a lot :down:
Regards
Quote:
Originally Posted by Timbosan
Thanks for the help a few weeks back Timbosan. I have recently changed from Prescott 3.0 to E6600. What a difference! Anyway, I have been changing things around with pretty good results although I am not exactly sure what I am doing :cool:
I have a few questions:
1. What reading on Coretemp or Speedfan tells the northbridge temp? I hesitate to go farther without knowing as the heatsink on the northbridge on my P5B Vanilla is cheep.
2. I havenīt changed the voltage on ram yet because I donīt really understand it. It is set on auto. I have slowly been lowering the voltage on the CPU VCore to lower temps. What else can I try?
good to see your on the way! nice results mate.
There is no temp sensor for the NB but its fine on stock volts anyway no matter what speed. If your concerned, put a 40mm fan on the stock NB heatsink.
Suggestions - Give the cpu ~1.35v and go for 400 - 450 FSB. If your at 3.2 @ 1.22v vcore i think 3.4 - 3.6 is maybe possible with a bit more vcore. Your ram is good for 800 - 900 MHz. Try this:
FSB = 401
Ram divider = 1:1 (at 401 FSB ram will be DDR 802 MHz) -- choose lowest ram speed choice in bios :)
Vcore = 1.35v (real idle in windows)
Ram = 5-5-5-15
Vdimm = 2.1v
PCI - E Frequency = 100MHz
PCI frequency = 33 MHz
Quote:
Originally Posted by Timbosan
FSB = 375
Vcore = 1.34 idle in windows and drops to 1.29 with orthos under full load (set much higher in BIOS) Why does it drop so much?
Vdimm I am not sure what this is? Is this the ram voltage? I donīt think mine is suppose to go above 1.9v When I put it above this it turns red. I am not sure.
PCI - E Frequency = 100MHz
PCI frequency = 33 MHz
Temps go to 61 C after a while under load with orthos. Is this ok?
Thanks again
2.1v is fine, dont mind the red. I try and keep orthos load below 65C personally so I would say 61C is ok.
The board undervolts and droops, this is why many do vmods to vanilla. :)
yeah vdimm is ram voltage, i use about 2.1v on all ram, the red is pretty much just to let you know you've gone over standard.
Try this:
vcore = 1.35 - 1.40v
set 401 FSB
RAM timing = 5-5-5-15-6-42-10-10-10-15 (down the page)
Vdimm = 2.1v
I got my un-modded P5B vanilla / E6300 up to 533FSB x 7, which is a 100% overclock! Not to bad for a cheapie system that has been running o/c'ed 24/7 for over a year!
---------------------------------------
Asus P5B / E6300 @ 533x7=3730MHz / Crucial 10th Anniv. DDR2-533 @1066MHz @ 2.1v / AC Freezer7 heatsink / Ati X800XL / Seagate 250g/320g / Hec AcePower 420w / SB Audigy SE / CM Elite case /w 2x 120mm fans
nice going!
very nice FSB :up: How long have you been running 1.52 vcore? what are your cpu temps like full load?Quote:
Originally Posted by Xvys
thnx, but I only ran the 1.52 vCore to test the max. o/c. I had SpeedStep and C1E enabled to reduce temps. I set the bios vCore to 1.70v, I think, but with vDroop?...probably some glitch there. It was idling in the low 50's, so load would be 65C. For everyday use I'm down to 450FSB x 7 with 1.31v Core, and 1.90v Dimm @ 4-4-4-10. It runs pretty cool at that voltage. I used to run it at 470FSB with 1.31v, but it was not 100% stable. I set the voltage to 1.375v in the bios which shows as 1.315v in Windows. That is the maximum I would use for prolonged use, although Intels says you can go to 1.3875v, I believe.Quote:
very nice FSB How long have you been running 1.52 vcore? what are your cpu temps like full load?
ok thats a nice chip youve got. I run 1.376v/1.384v (idle/load) and the temps never go over 58*C full load in ~25*C ambient. 1.31v is under rated voltage (1.35v written on the cpu box) so you can go higher mate - I think <1.48v is ok long term using air cooling. Intel say 1.5v max nominal (safe maximum), 1.55 absolute max.
It looks like your cpu is very similar to mine :P
Quote:
Originally Posted by Timbosan
Hi:
I have been trying a combination of these settings over the past week. Normally I can boot with no problem but when I run Orthos, the system will reboot after a while. The temps for the cores are normal, but I I get around 71 C after a while for CPU (not cores). This reading has always been high, even when I had a prescott processor in this board a few months ago. I think something gets too hot (northbridge or ram but I donīt have sensors for them) and causing it to reboot.
I have 1 120 fan coming in and 2 120 fans going out. Room temp about 21 C
Any thoughts?
Thanks
have you done the pencil droop mod? It takes 5 min, you can do it in the case, and makes so much difference.
Rebooting could be cpu - give it 1.4 - 1.45v (real load).
To check temps of NB etc, use your finger :) Pain threshold for human skin is ~42 - 45*C so if you can leave your finger on the HS ok its under ~42*C, hot after a few secs is ~45 - 55*C and so hot you pull away straight away is 60*C+.
I doubt its your NB causing the reboots mine was fine at stock volts, stock HS no fan at 490 FSB.
I would like to try it but the description I read here is for P5B deluxe and I have the vanilla.Quote:
Originally Posted by Timbosan
Here you go pencil vdroop for the vanilla post #300:
http://www.xtremesystems.org/forums/...114076&page=12
About the instability, i'd guess its cpu give it a little more voltage than what it is at & re-test :up:
Thanks, I will give it a try
Quote:
Originally Posted by Timbosan
I must be retarded, you have a great detailed picture but I canīt find the place on the MB :shrug: I didnīt know it would be so small. Anyway, I donīt have much experience in this area. Could you tell me where your picture is located on MB?
Thanks Again
above the cpu socket, a bit towards the ram slots i think soz not at home and way pissed lol :up:
edit: yes it is above the cpu socket its labelled ADP3180 hope that helps :)
Hi,
my first post:
Well, I have tried the pencil mod with a 6B and it worked, I could go further than 2,3V. The Problem is, that the board wont start when the Vdimm is higher then 2,1 V, or it freezes in the bios or while loading winVista.
I have 4 GB DDR2 800 MHz, I think thats the Problem, but I wont use only 2 GB, since I bought 4.
When I start with 410 FSB with 2,05 V (My Board has 2,05 V when I set 2,1V), the pc starts, but freezes while loading windows, it needs more Volt.
So, i pencil moded the resistor and I measured 2,1 V, I started and the PC freezes while Loading, without BSs (before the pencil mod I saw BSs).
And when I set Volt to 2,2 and higher, the pc wont start at all...
With 2 GB I could go higher then 450 FSB and the PC still started, with 4 GB I have weird errors.
I hope you can help me.
How many here have an E8*** chip in this board? I'm interested by this statement from Madshrimps:
Quote:
This reminds me of the early Conroe motherboards as we had to wait a few months to have high FSB frequencies as the first chipset that was capable of running high FSB's was the 965. The latest chipset are not ready to take the 45nm chips beyond 600+ FSB and most of the boards will be stuck at 550MHz FSB or less on air cooling. The P35/X38's all have the same issues, so the only solution is a newer chipset or better support for the Wolfdale and Yorkfields. However, something strange occured when reading about this issue and talking to people who tried to bypass these problems. It seems that one of the older chipsets, the 965, have no problem at all reaching 620MHz FSB on air cooling! So in order to max out your CPU, you'll have to find a P5B or Commando. On air, however, every motherboard will do well.
I will admit to not having read the whole thread. I only skimmed the last few pages, but I really didn't see much on it.
hello overclockers!
a new version of SetFSB 2.0.b.19r overclocks P5B Vanilla in Windows. ^^
the PLL is ICS9LPRS552AGLF.
to download here:
http://www13.plala.or.jp/setfsb/down...tfsb20b19r.zip
its a beta, but it works with my board.
thank u Abo for a great job !
I got a new problem.
Just bought OCZ Reaper PC8500....
So they will post and push beyond 1100mhz with a very LOW FSB and a high divider like say 350 but if I run my fsb at 426 with a divider which results in 1066 for the ram it wont post.
I always ran 430FSB with a 1:1 divider on a set of old Patriots 5300.
However with these 8500 I can only run at 1:1 at FSB @ 430, making the ram run @ 430...Which is what, nearly 100mhz underspeed....And if I set the divider to 1066 then it just wont post.
I tried whole range of timings and volts. I did the Vdim mod, giving me 2.35 under 2.1 in bios.
Any suggestions?
Different dividers are part of different straps, and even then, different dividers within the same strap may not have the same ease of setting.
Generally, with p965's, 400fsb with 4:5, some boards have trouble as is. Beyond 400fsb and wanting to use anything but 1:1 or 2:3 is generally incredibly difficult.
If you're insistent on using 4:5 at 426fsb, you're going to probably need a ton of vmch to do it.
THanks for the reply, I thought the thread was dead :p:
And yes, you def seem right because no mater what sticks I have used before, at over 400fsb nothing will work at anything more then 1:1.
The good news is that I seem to be running stable at 460 1:1 with 4-4-4 :yepp: THats 30 gain on my old OC, and much tighter timings.
Now that ram is not stopping me I guess I can push it further...just need to do the Vdroop mod, for which I cant seem to find a diagram :(
Hi guys,
I wander if DDR2 1066 can be used in P5B (in manual highest RAM mentioned is DDR2 800), Can you post your RAM specs.
Thanks
V.
i was able to use 2:3 fine at 400fsb for 1200ddr2
Guys is CPU-Z a good tool to measure voltages?
Cause according to CPU-Z my V-droop is not that bad.
I only get a 0.016 drop....not 0.06..
only mod I did is the vdimm mod.
Hey all:
I got about $200 to $300 and I want to upgrade something in the next few months on this system. Any suggestions on what would be the best bang for the buck?
All suggestions welcome.
:welcome:
It depends~ Are you Gaming? Maybe the BFG 8800 GT OC~ The GT is 199 & gt oc 219 or something...On sale if you get a game (bb) or maybe a new cpu? the e8500 (I am sure there are deals on quads if you are into video editing or stuff that utilizes them) & I bet there are other card deals.Quote:
Originally Posted by htredneck
I want to keep it somewhat balanced. I do a little of everything. Games, vidio, web surfing. What I want is to spend some now and not have to spend a $1000 in 6 months or a year.
sorry to resurrect this thread,
I have an E6600 with DDR2-800 RAM running on this board, my FSB wall is 341MHz, I just can't break it, even if I choose crazy voltages for both the CPU and the MB.
My RAM can't be the problem, because I even run it below the real DDR80 (400MHz)
Are there any mods, slutions to break this wall? I feel like my CPU can do a lot more than 3069 MHz.
maybe a strap problem? try to boot with 401Mhz FSB, bit higher voltages as default, and Ram with 1:1Quote:
Originally Posted by Phili
You are up close to the dreaded FSB wall that affected P5B's and the 965 chipset when they were the latest thang on the street.Quote:
Originally Posted by Phili
It's the NB chipset that starts to get hugely overclocked as you reach past 340-370 FSB (I forgot how the maths goes).
As "LisijBOB" says, Put your FSB to 401 to get past the 333 strap and things should settle down.
I'm not sure if the article is still around but.............http://www.thetechrepsitory.com has a good write-up on it
Hey All: Sorry to keep this thread alive but I have decided to upgrade and you all have been very helpful in the past. I have money to upgrade the MB, chip and ram OR the graphics card and power supply. I am not sure which would be better at this time.
I am looking at the Ą7
Any help and opinions would be great
Sorry to bring this thread avlive as well but was there ever a fix for the 533fsb issue. I am overclocking a PD805 and if I select any memory divider besides the default one the system wont boot. Running 166fsb and DDR2-443 , DDR2-553 and DDR2-6## with not boot , i'm running bios 1803. Should I try bios 0170?Thanks in advance.