P4C800-E and dividers=evil

[daddy_fizz]

well I am trying to use dividers on my P4C800-E with some corsair ram that i have, but it will never boot with any divider enabled exept far below what i know what the max of my cpu is...

i am using a 2.4C now instead of my 3.0C i get get it to run fine @ 270 1:1 but if i try to boot at say 290 5:4 or 3:2 it will not even post... and i know this chip can go higher

I've tried a couple of different bioses 1011, 1010, 1009, 1007 but none seem to help at all. My old P4C800-E was Rev 1.02 and the new one i got is Rev 1.00 but both have these problems...

this has been discussed before but i was just curious if anyone might have a solution to my problems? this is actually my second P4C800-E becuause I RMA'd my other one becuase the divider issue and 2 ram slots stopped working on it...

if i can't fix this i might just have to try another MB....


thanks

~Fizz

[NyCUndaGrounD]

When u go to 5:4 divider or 3:2 divider try loweering your vcore and lower the memory volatge alot. When i switched from my mushkin 245 1:1 divider to 5:4 divider 245fsb, i couldn t post after. But when i had it at 5:4 divider and lowered the vcore and memory voltage it was able to post.

[daddy_fizz]

thx, will try right now...

~Fizz

[daddy_fizz]

nope didn't seem to work :( still wouldn't post...

~Fizz

[Major]

Turbo mode set to Standard
Hyperthreading off (for now)

[daddy_fizz]

have messed around with that already but will try again :D

this is the only problem i ever have with this board, want to keep it if i can :D

~Fizz

[Major]

I've found Hyper Threading to crap out on the 2.4c before the chip does. It's nice to have it enabled for everyday use though but you should see if its the limiting factor.

It could also be the nb cooling. Are you using the factory hs on the nb ?

[daddy_fizz]

well i had a TT tiger on the old P4C800 but i have the stock hs on the new one...would you suggest putting the TT tiger on this one ???

~Fizz

[daddy_fizz]

anyone have the 1007 bios? i thought i had it but i dont

~Fizz

[Major]

I would put the TT tiger on it if your trying to hit some serious FSB.

I'll check in my archeive to see if I have bios 1007

[daddy_fizz]

well i tried the TT tiger on there, no difference at all it seems.... not looking so good....

~Fizz

[Sovereignty]

Is that ram using winbond ch5 chips?

[daddy_fizz]

not sure, i really don't feel like taking the heat spreaders off...

~Fizz

[Sovereignty]

There's known problems running that chipset with dividers and CH5 chips over ~255fsb. Can you run 5:4 at anything lower than 250?

[daddy_fizz]

yes but it is not totally stable unless i lower my OC a lot


~Fizz

[Major]

What timings are you running on your ram ??

[daddy_fizz]

3-4-4-8 (SPD)

[Major]

is it the Corsair PC4000 you have listed in your sig ??

[daddy_fizz]

yes

~Fizz

[Major]

I did some looking around trying to find some test results and reviews that stated the same issues with the dividers and didn't find anything. But I'd say that its just that, an issue with your ram and the 875 and/or the P4C800 bios.

Do you have any other ram that you can use ?

Just for kicks try 2.5-4-3-7 that was the optimum performace settings for the ram in one review I read. They also stated that their sticks would only do 255mhz max at 2.85v

Heck after thinking about it just taking the ram settings off of spd and manually settiing to 3-4-4-8 might have some affect as well.

[daddy_fizz]

will try, thanks...

this ram will run at 270 1:1 without any problems... so 250 shouldn't be too much of a problem...

~Fizz

[benonmsn]

i cant go over 280 reliably, mushkin lvl 2 2-2-2-5
at 1:1 i can run that ram at 250 ddr500

ive treid it with the ram up to 3.2v, and tried it all the way down (2.5, 2.6. 2.7, 2.8) no luck
i have that new swiftech nb cooler on it. all temps are low.
no clue what the hold up is
treid all sorts of vcores as well. it bugs me... its holding me at my 21.7 3dmark.. i want 22k... i have wet dreams about it:banana:

[Major]

I've also seen some posts (Kunaak for one) that suggests by increasing the APG/PCI bus you can get past the "wall" but not sure if that was on IC7 or P4C800 ? also might want to try increasing Vagp as this has also been suggested as being one possible fix to getting high fsb.

[daddy_fizz]

yeah i have tried raising the agp/pci to one step above 33/66 and i have also always run my vagp at 1.60.... nothing seems to help...

~Fizz

[benonmsn]

yeah just tried all 3, 66, 72, and 80, no luck =(:rolleyes: :mad: :confused:

[benonmsn]

Originally posted by daddy_fizz
yeah i have tried raising the agp/pci to one step above 33/66 and i have also always run my vagp at 1.60.... nothing seems to help...

~Fizz


i just orderd a ic7 max3, 2.6c and 2 more sticks of lvl 2 3500

ill let u know if this helps any. this will give me 3 fronts to test and see if i can find the prob buddy, ill let u know... should all be here within the next 3 days, so give it 4 and we will see where the problem is. once, when i first got the board, i 3d2k1 at 287.. now i cant run stable at 280 anymore. but this new junk should let me see where the problem is. ill keep u posted

edit: mine isa rev 2.0 (p4c800 e dlx)

[jmke]

I'm going to see if I can test some more P4C800 motherboards as this issue seems to be more concerning then first thought.

my motherboard DOES NOT POST if I let the ram settings to SPD, that is both with PC3700 or PC3200, both corsair.


my other problem I will just quote ;)


hi there, I rarely start threads, but I'm in need of your expertise help ;)

got an Asus P4C800 and P4 2.4C (ram = Corsair PC3700 good for 260Mhz at CL3-4-4-8)
together they are good for 3.2ghz stable overclock.

I'm using the 5:4 divider to take the memory out the calculation of the possible "bad boy"..

leaves me with the CPU and motherboard,
. no matter what voltage I use on the CPU, I'm unable to push the CPU past 3.3ghz.
at 275FSB on the chipset the boards just instantly reboots...

are there different BIOS versions available for the Asus P4C800 which could resolve this issue?
or am I just "bad out of luck" with this motherboard?

thanks in advance for any and all replies :D

[corbec]

uhhh ooo...me friend just ordered one. o well he shouldnt need dividers with his 3.06 533fsb and pc2700 ram. but when he gets new ram and a 2.4c..another story

[benonmsn]

yeah ive tried all ram timimings from 2-2-2-5 all the way to 3-4-4-8 or soemthing, systemmatically down the line at 290fsb, from vcore from 1.55 to 1.775. vmem from 2.5 - 3.15. no luck. its really stupid. however i did read about vid card playing a part in it. i have a ti4600 at home, when i get home (at work) im gonna throw it in and see. but.. if it works, i will be MORE pissed off and might possibly explode into chunks of ben

[ScoTTy]

Hi all my second post @ this forum :P

I got an p4p800 (dont think its any OC differens between the two boards).

My p4 2.4C goes upp to 3.5 gzh (292 mhz fsb) 100 % stable.

i have borrowed some corsair 3200LL memmory from a friend and running them @ 3:2 ratio (lower than 400 mhz :P)

i dont want to OC my friends memmory so i wont go over 400 mhz.
my voltage is.....
1.625 vcore and 2.75 v-dimm.

i had some corsair 3200C2 modules and they didnt work well.
i couldnt get them to go over 402 mhz in standart latency and worst was that i couldnt get the computer to eaven start over 3 ghz, no matter what ratio i was taking.

it could be the memmory so if u can i think that u should try some other memmory.

i am about to buy 2x512 memmory that can go @ 467.2 mhz with the 4:5 ratio. maybe A-DATA 466mhz (cheape :P)

I think that it is an lovely forum that u have here ;)

[corbec]

id get some pc4000 hyperx :)...

got 526mhz in a max pc mag i saw. 300 5:4 wouldnt be too shabby!!!

[Scrapin 240]

Originally posted by benonmsn
i just orderd a ic7 max3, 2.6c and 2 more sticks of lvl 2 3500

ill let u know if this helps any. this will give me 3 fronts to test and see if i can find the prob buddy, ill let u know... should all be here within the next 3 days, so give it 4 and we will see where the problem is. once, when i first got the board, i 3d2k1 at 287.. now i cant run stable at 280 anymore. but this new junk should let me see where the problem is. ill keep u posted

edit: mine isa rev 2.0 (p4c800 e dlx) i just RMAed my IC7-Max3, it had to be the most overrated board ever. Absolutely sucked. Check the abit forums and you'll see.

[luihed]

You guys might wanna try booting at say 250fsb 5:4 then overclock in windows using Clockgen or Setfsb...... Just remember to set your vcore higher in bios cos you wont be able to set them higher in windows....

[LikwidKool]

my dividers work fine, but it seems more picky about timings than my IC7 was if you can figure that one. I have been messing with this board for the last 3 day's, and it is so damn quirky.

[jmke]

Originally posted by luihed
You guys might wanna try booting at say 250fsb 5:4 then overclock in windows using Clockgen or Setfsb

same result
craps out @ 269Mhz fsb here :/

[Jin]

I have the Corsair PC4000 and an Abit MAX3 and none of my dividers work either, after reading this post I think anyone with ch5 (or for some reason just this corsair) is §§§§ out of luck with the 875 chipsets.

I have tried every bios out 1.2, 1.3 beta, and bigtoe's. None work no matter what I change or do. I don't think its the MAX3 anymore. I think its this god forsaken memory.

For instance who here has any ch-5 or 4000 brand memory running anything other than 1:1? If anyone is please give us a spec sheet :D , cuz this is seriously aggravating :brick:

Granted I'm running my memory at 270 @ 1:1 that doesnt give me alot of options with CPU o/c and memory latencey is another huge issue 3-4-4-8 is garbage. :mad:

[jmke]

the dividers work on the Asus, but the board just stops working @ 269FSB.

[Jin]

Do they work with PC4000 memory tho?

[jmke]

this P4C is really acting up

reset bios to default speeds
boot, pc hangs in windows xp (cpu temp:24°C)
reboot.. no post.. power off/on. no post
reseat power plug.. no post.

power on + hit reset several times.. aha there it is again.. works okay now in XP

WTF ?



PC4000 memory:
CPU - P4 2.4C Malay (L310A735-0101)
Cooling - Maze-4 Powerkit, Maze-4, Z-chipset block, Hydor L30, Black Ice Xtreme, 2x120mm Sunon (push/pull) 1/2" tubing.
Motherboard - Asus P4C800-E Deluxe (BIOS 1011)
IDE - Maxtor Diamond Max Plus 9 SATA150 120GB HDD
Memory - Corsair Twin-X4000 PRO 1GB-kit
http://www.ksbrainstorms.com/index.php?pagename=Corsair_Twin-X4000_PRO_Series

[benonmsn]

u know what....

287fsb with 5:4 puts the ram at 460mhz

287 * .8 right?

now my comp wont boot into anything faster then that with 2-2-2-5 (edit: my comp wont boot at all past 287 no matter what timings)

i think the problem is very logical...my 433mhz ram will only go 460mhz at 2-2-2-5.. right?

maybe this isnt that tricky after all......

[phil stanbridge]

Guys - there is a known problem with the canterwood chipset and SOME types of memory - I had exactly that problem with my Corsair 4000. It would work fine at 265FSB 1:1, but would crap out at 3:2 or 5:4. It doesn't make a lot of difference which board you use - it's down to the Intel chipset and some memory types.

[Soulburner]

I am using BH5, I have no divider problems. Its the CH5 and some Hynix that the boards don't like.

Using 3:2 it just stops at 287 and wont post when 286 is 3DMark stable.

[benonmsn]

the 3:2 at 287... we all are dying at around 280 +/- 10. doesnt matter what divider. 5:4 or 3:2
i use bh5

thats the junk

[Hobocrow]

It seems to me, that some of you guys are getting Great results with your P4C's and BH5 memory while running very low voltage.....I don't understand why you're not happy! :D

[Scrapin 240]

Originally posted by Hobocrow
It seems to me, that some of you guys are getting Great results with your P4C's and BH5 memory while running very low voltage.....I don't understand why you're not happy! :D a OCer is never happy :wierd:

[Hobocrow]

Originally posted by Scrapin 240
a OCer is never happy :wierd:

Maybe this will make you happy!....;)

[Scrapin 240]

:slobber:

Drool City

[wolfgang]

This is what Iam getting at 3.2volts.

[Hobocrow]

This just proves that the P4C and BH5 memory isn't all bad...as Zroc has said many times before "It's a crap shoot" !:)

btw...this does not answer the question of the thread,,,well, maybe alittle!:stick:

[Jin]

Ok yea I know some canterwood boards have problems but does anyone here know of anyone else that has ever ran the chipset with PC4000 memory (non bh-5) successfully at 3:2, 5:4?

I just want to see if the board straight up wont work rite with dividers on these types of memory modules. :D

And Hobo arent you a little afraid of such a high vcore rating on your cpu? I mean is that for everyday use or what?

[wolfgang]

I had some xms pc 4000 and it was weird. If I used a divider that made the ram run under 230mhz at 2.5cl it would work. Untill I set the cl to 3 the dividers would choke. The ram I had would not do anything over 230 without lowering the latancy.

[BBThumper]

......JUST WONDERING WHY DOES IT HAVE TO BE A DIVIDER PROBLEM? my first 2.4c would not go over 272 fsb no matter what voltage but my new one does 293fsb out of box. I would think your cpu is topped out before a divider problem...........sorry about the caps.........

[daddy_fizz]

for me i know for sure that it is Not the CPU. this used to be Liquid3d's cpu and he got it up to 3.6 and higher. if i try getting that high i need the divder and it won't even post at 3.3...

~Fizz

[LikwidKool]

just some input. I have 2 sets of of bh-5 that work at any divider very well. I have some pc3500 OCZ Gold that will do 240 1:1 at 2.65v, which is better than the bh-5, but struggles at 285 5:4 which the bh-5 does easily.

Now the other day I got in some OCZ pc4000 that will NOT do 5:4. I have only tried it at 250 and up but I was getting bios corruption messages. Luckily a hard reboot would save it, but it does not like 5:4 at all. Also I find it weird that this ram will not stay stable above 260fsb. I need to figure that one out.

For info my ram is:

2x256 pc3500 Corsair XMS v1.1 bh-5 (all dividers)
2x256 pc3500 Kingston HyperX bh-5 (all dividers)
2x512 pc3500 OCZ Gold ?? on the chips (all dividers but struggles a little)
2x256 pc4000 OCZ Gold ?? on the chips. (only 1:1)

[Soulburner]

2x512 pc3500 OCZ Gold ?? on the chips (all dividers but struggles a little) - Possibly Samsung, not sure
2x256 pc4000 OCZ Gold ?? on the chips. (only 1:1) - Hynix

I have BH5 and it too runs all dividers perfectly. My CH5 would not.

[benonmsn]

got a max 3 to test out, to see if it could do better then my crappy p4c800-e dlx that will oinly do 280ish at 5:4

max3 will only do 250 at 5:4

i dont know why i cant go higher with the p4c800 but the max is worse, incase anyone was considering..


maybe ill try epox or msi

[LikwidKool]

Originally posted by Soulburner
2x512 pc3500 OCZ Gold ?? on the chips (all dividers but struggles a little) - Possibly Samsung, not sure
2x256 pc4000 OCZ Gold ?? on the chips. (only 1:1) - Hynix

I have BH5 and it too runs all dividers perfectly. My CH5 would not.

thanks buddy. I never got around to asking them exactly what IC's where on the pc3500 Gold. Since the pc3700 was sammy, maybe the pc3500 is.

The pc4000 I wa kinda sure they were hynix, but wasn't positive.