1.75v with P4 1.8m @ 2.88ghz: SAFE ??

[Soulkeeper]

what do you all think maybe a few months life ??
or should i drop the vcore under 1.7v and stick with maybe 2.78 or so ??
edit: temps reported by winbond hwd and bios give me about 50c under load and 45c idle

 

[jiffylube1024]

Originally posted by: Soulkeeper
what do you all think maybe a few months life ??
or should i drop the vcore under 1.7v and stick with maybe 2.78 or so ??
edit: temps reported by winbond hwd and bios give me about 50c under load and 45c idle

Oooh, I dunno. How new is that 1.8m? If it's anything like the "C" P4 chips, 1.75V is steep. 50C is kinda high also (especially since the IC7 seems to under-read in Windows. Check it's temp in the BIOS on a reboot and compare.).

I'd probably do the 2.78 thing. You're not losing much speed, and dipping below the magical "safe" 1.7V blanket would be a #1 priority for me anyways.

 

[Duvie]

I would stay sub 1.7v actual...

I would say at 1.7v you should get better then 2.78ghz if you can truly do 2.88ghz at 1.775v...Once you get that high with a p4 chip each vcore boost of .025 may only garner 1-2fsb max.


Also heat is not what damages these things trust me...I damaged one and never saw load go over 50c but had voltage at 1.8v for 2 weeks. Many had early northwoods to high mhz and 1.8-1.9v with water-cooled systems with insane cold temps and they still fried them...it is the voltage that damages the gates...

 

[Soulkeeper]

Originally posted by: Duvie
I would stay sub 1.7v actual...

I would say at 1.7v you should get better then 2.78ghz if you can truly do 2.88ghz at 1.775v...Once you get that high with a p4 chip each vcore boost of .025 may only garner 1-2fsb max.


Also heat is not what damages these things trust me...I damaged one and never saw load go over 50c but had voltage at 1.8v for 2 weeks. Many had early northwoods to high mhz and 1.8-1.9v with water-cooled systems with insane cold temps and they still fried them...it is the voltage that damages the gates...

yeah like the pile of athlons i've fryed



so anyways you all think 1.75v is gonna kill her ??
how long do you think I got ??

 

[Duvie]

I don't think you will actually kill it but after say 2-4 months you will start to have diminishing ocing ability and may have to knock it back 1/2 of what you have achieved....I thikn 1.8v+ is a more imminent killer....

Drop down to 1.7v and if you can do 1.775 v at 2.88ghz I imagine you can do 2.8ghz....

With my p4b frmo the moment it needs more juice above 1.525v I only get about 150-160mhz more ftable to 1.7v or less (prime95,memtest,divx,mpeg2 encoding, Autocadd, etc tested!!!)

 

[Soulkeeper]

yeah i was able to do 2.85ghz at 1.71v but it was only stable for a few hours
so i upped the voltage to 1.75v (swings between 1.73 and 1.76) and gave her a few more fsb and it is stable
did memtest86 for an hour and a half and passed 3dmark2k3 etc

also i wish they had more precise dimm voltage settings on this sucker
if i set it to 2.8 it gives me 2.78 (which is fine)
but when i set it to 2.9 it gives me 2.95v to 3.05v
all i need for my mem to run at 235 fully stable 2-2-2-6 is 2.85v
but over 2.9 starts to cause issues probably from internal heat

yeah i'm gonna reboot and try to get the voltage under 1.7
at 1.66v i can run the thing up to like 2.7ghz

 

[Duvie]

So this is your new mobo??? Wow You got a nice Oc enhancement by going to this mobo???

Did the abit Ic7 have voltage up to 3.1v or only 2.8v???

yeah i was able to do 2.85ghz at 1.71v but it was only stable for a few hours

I would imagine droping it 50mhz or about 4mhz fsb with same 1.71v actual should secure stability for at leat 6-12 hours...For most that is stable, but I don't know your definition.....

I say do one thing though...Run a good mpeg2, or Divx type encoding and see if it truly stable...I get get prime95 to run for 12 hours and memtest for 10 passes all test and still have it error in autocadd 2002, besweet, and Divx or Tmpgenc....

 

[Soulkeeper]

Originally posted by: Duvie
So this is your new mobo??? Wow You got a nice Oc enhancement by going to this mobo???

Did the abit Ic7 have voltage up to 3.1v or only 2.8v???

yeah i was able to do 2.85ghz at 1.71v but it was only stable for a few hours

I would imagine droping it 50mhz or about 4mhz fsb with same 1.71v actual should secure stability for at leat 6-12 hours...For most that is stable, but I don't know your definition.....

I say do one thing though...Run a good mpeg2, or Divx type encoding and see if it truly stable...I get get prime95 to run for 12 hours and memtest for 10 passes all test and still have it error in autocadd 2002, besweet, and Divx or Tmpgenc....

yeah i got the max3 good motherboard i am happy with it and like the gigabit ethernet and sata
it goes up to 3.1v or 3.2v vdimm (but i think they need .05 increments tho not just .1)
i dropped the vcore to 1.68v and am at 2.83ghz
i figure if 1.71v almost gets me 2.85 fully stable it is worth a shot
it's running memtest86 now

the highest 1:1 ratio i can run stable seem to be around 225 or so
with 5:4 i can get it to 240

i wish they had all the mem ratios that my NF2 board had tho

ohh and i got my Girlfriend's computer running, but the harddrive started knocking on me and went out (quantum fireball) so i'm gonna be looking for a cheap 20 gig

it is a 1700+
msi kt133a motherboard
512 + 256 + 128 pc133
GF fx5200
sb Live!

the only thing that sucks about that msi motherboard is it only lets you go up to 1.63 vcore max (at the 1.7v setting)
so i am only able to get the 1700+ to 1900+ speeds
i also have a 2500+ that i might throw in here and hope for near 2ghz

 

[Soulkeeper]

ok i'm just running it at 2.7ghz @1.66v
this seems like a safer choice (althought prob not by much)

i just couldn't get it to let my mem run a 222 2-2-2-6 with 2.78v and raising it to "2.9" gives me way too much at 2.95 to 3.05
so i'm at 5:4


ohh well i'm gonna go play some UT and see how long it takes to crash