PIV 1.8A @2.8 GHz!!! 155 FSB, 1.69vCore 35C idle temp!!!!

[Blurry]

lOL...my bad...I meant 1.725 vCore. LOL....sticky fingers can't type.

 

[LastRide]

Itchy man have sticky fingers

 

[JuicyFruit]

if i can go 1.7v at idle to squeeze a little more out of this puppy, i will.

thanks for all the help, forum people. and lastride is always dropping the knowledge.

 

[LastRide]

JuicyFruit,if your at 1.65V now then at idle your are at 1.71V.Install PcProbe off your disk that came with your mobo or here in the programs post if you don't have it installed already.You could go to 1.7V in your bios and see how much more you can do with your chip.You will be at 1.76V idle and 1.7 under load running prime.Open PcProbe while you run Prime 95 and you will see how the voltage reacts.Just do it for testing and drop it back when your done.Its hard to say,your chip might run for a long long time at 1.76 idle.Its anybody guess if it lives or dies down the road.Guys running above 1.75V are really taking big chances.Only expect about 6 FSB's more stable with the added voltage.I have learned alot from Duvie and Thugs and from reading through the forums.I'm only scratching the surface so far.Those guys and a few others are the meat and potatoes for knowledge about this stuff.

 

[Duvie]

qouting that 1.725v means to me you are reading the vcore you are setting in the bios alone...That is not an accurate vcore measurement...

What mobo do you have???

If you have an Asus mobo then you are well above 1.725v and in the possible danger territory...Epox mobo like mine and you are oinly 1.66v when set to 1.725 in bios...

You need to make sure waht you are actually set at...Get pcprobe and/or MBM5.1.9.1 and see what the actual vcore is at idle and loading in prime95...

The likely reason why the temps are higher when playing a game is that it is really taxing the vid card, HDD and other components whereas prime95 is not testing or stressing the same components. This is likley adding to higher system temps (ie case temp also) and therefore the cpu has warmer air in the case and is less effective in cooling do to warmer air being moved over heatsink.

 

[JuicyFruit]

pcprobe's telling me i'm at 1.648v - 1.696v idle. after i start prime95, it drops below those levels, to 1.6v - 1.648v.

i just bought a bunch of parts for my friend, he couldn't hit 3ghz with his 2.53, p4b533-e, corsair 3200 cas2 (512mb). i wonder if i'll be able to hit 3ghz with mine. . .

i'll let him elaborate on his situation. i believe he was running prime95 last night at around 2.9ghz?

 

[Blurry]

I have a MSI 845G MAX which undervolts...1.725vCore is actually 1.63. My motherboard undervolts a lot...so even when I hit the max 1.8vCore, I still remains in around 1.67-1.7 vCore.

 

[Duvie]

juicyfruit,

Maybe that is a pcprobe thing but I barely fluctuate my vcore from idle to load as you do just in idle...the overall swing of nearly .1v is way too much in my opinion...

I don't know your situation...what Power supply do you have?? Does it have p4 connector? Are you using it as well as a regular 4 pin molex connector??

 

[LastRide]

JuicyFruit also what is your voltage set inside your "bios" 1.65?.I forgot which Asus mobo you had too?.What is your voltage at idle when you open PcProbe,not under load.When you run prime for a minute whats the voltage?.The numbers are not adding up for some reason.

 

[JuicyFruit]

i have the p4b533-e. i've got everything plugged in but at idle it's at ~1.65v, just as in bios. under load, it goes below that, to 1.6v - 1.648v. i have no idea what's going on.

i have one of those antec knockoffs, a yellow aluminum alienware type case with 420w powersupply. the powersupply is supposedly a true antec but i have doubts about that.

thanks for all your help, guys.

 

[LastRide]

Does it stay mostly at 1.6 or 1.648 or is it steady up and down under load?.Also do you have the 20 pin ATX plug plugged in and the small square 4 pin P4 plug plugged in?.Both those need to be attached.If they are attached you can also try and plug in the 4 pin flat molex connector on the mobo and see what that does.If nothing,unplug it.If you are 1.65V in the bios and underload your mobo stays at 1.648 that would have been awesome.A lot of boards overvolt or undervolt too much.Your undervolting about .050 under load which is weird for that board.Your board should be overvolting at idle around .06.So if your 1.65 in the bios at idle you should be at 1.71 in PcProbe.Mikki has the same mobo but I can't remember how much he overvolts.Some boards just get different voltages,nothing you can do there.It should say Antec on the power supply somewhere if it is an Antec.I almost certain it isn't an Antec cause I read about that case and power supply you have.It Doesn't mean the power supply is no good.

 

[JuicyFruit]

just checked again to make sure, and yes, i have all plugs in. this is totally weird. why does my voltage go down when i'm under load? my computer is always on and when i'm sleeping, it's at idle. so for 70% of the time it's on, it's gonna idling at over 1.7v if i up the vcore anymore.

i think i'm gonna sit on my current status but i am curious as to why my board's behaving the way it is.

 

[LastRide]

Yeah,stay with your current voltage.If you have the molex 4 pin flat connector plugged in unplug it.Just the P4 4pin square plug and the 20 ping ATX power plug should be plugged in on your board.Could be a power supply thing,if not than its just the way your board is.You could try exchanging your board if its still under warranty.You need to rule out the PS first and make sure the third flat 4 pin molex plug is not connected.This is a long shot,check the switch on the back of your power supply and see if its on 115.

 

[SpeedyGonzales]

JuicyFruit,

just my observation, maybe it helps:

when I set the Vcore to 1.5 on my rig, it usually was at 1.47. Setting the bios to 1.65 resulted in an effective Vcore voltage of 1.63. And it was never stable. It was constantly going up and down by +- 0.03. Under load typically down.

I replaced the generic 300W PSU, that came with my case by a 420W PSU from TSP. Since then the effective Vcore voltage is still less than the bios settings, however it is now absolutely stable running the CPU either idle or at full full load. I assume that means that, the undervolting is really coming from the mobo, but the stability of the voltage is driven by the PSU.

Cheers
Speedy

 

[Nyquest007]

A question sortof in the subject. If I were to get a 1.8a today, is it a garanteed 2.4 oc? I'm looking at either getting 2.4b or saving 50$ and going with the 1.8a and overclocking. I will oc both but wondering what you guys suggest. I've decided to go with an abit bg7. I want atleast 2.4-2.5 @ atleast 133 bus speeds.

 

[JuicyFruit]

i think you're pretty much guaranteed a 133fsb. a lot of people, but unfortunately i'm not one of them, hit HIGHER fsbs than me with LESS voltage.

wait, i'm NOT supposed to have the third 4 pin molex plugged in? i'm confused. it's not there to be plugged in? how odd.

 

[Nyquest007]

Okay Just placed an order Tell me if I made a mistake.
1.8a and the abit bg7
Hope to oc to 2.6 myself
With all the price cuts I was looking maybe for a little more power, but I'm still looking to save a little money.

I'll be running some crucial 2100 that I have running at 333mhz now so I don't think it will be too bad.

I'm hoping with little voltage tweaking I can get that, everyone else is. And with the northwoods scaling up so well I don't see why it's not possible for more to get it. The norhty's are all on the same core right?
So everyone should be able to get close to same oc

 

[SpeedyGonzales]

Intel has a very mature process for the Northwood as well as very high yields, however, there is no guranteed level of overclocking. The best pieces are tested and sorted out to become 2.53s or 2.4s or 2.26s etc. Because Intel has such high yields, most of the 1.8s would qualify for more, but as I said, no guarantees. You may be unlucky and buy a bad overclocker. According to what people say here in the forum, getting around 2.4Ghz with a 1.8a is nearly a no-brainer, 2.5 to 2.6 is likely, more than 2.6 is rare (at least with a reasonable effort and investment).

Your overclocking is also dependant on the other hardware. I was able to get from 2.2 to 2.4 by using a better PSU. So sometimes it is other components, which make the difference.

Nevertheless I believe, that the 1.8a is a very good choice. Very cheap and a very high probability to get at least a 33% oc, with some luck even more. Make a decision, if you want to get to the highest frequencies or if you want to have the most bang for the buck and that is definitely the 1.6 or 1.8.

Cheers
Speedy

 

[JuicyFruit]

okay, reread the manual. when i first boot into windows, pcprobe reads 1.69v. as soon as i start prime, it drops down to 1.6v and pretty much remains there, sometimes hitting 1.616v, which is less than what it was WITH the 4 pin flat molex (1.6v - 1.648v).

weird.

 

[LastRide]

JuicyFruit,thats wild.Your at 1.65V in thr bois.Soon as you start probe at idle your at 1.69V which is "fine".Asus overvolts around .04-.07 at idle,its close.When your under load in prime you drop all the way down to 1.6v-1.616,thats terrible.Your dropping roughly .10 from load which is lots.Keep the 3rd flat 4 pin molex plug plugged in.Its not really supposed to be used with yours and my boards.Its there if you don't have the P4 square 4 pin plug on your power supply.The P4B266 uses all 3 I believe,but you can keep yours plugged in if it helps which it does.I would try another power supply.If you can borrow one for half an hour off a friend or something,just hope his is good,or buy one at a store that you can return it if it doesn't help.Get a good Antec 430 True power PS or an Enermax power supply.Sometimes you can find them in the forum here for sale for a good price.You can get a 350 watter will do but your better off with something with a little more watts.Guys with 300 watters are doing good if its a good PS.

Your missing the P4 square 4 pin plug on your power supply from the sounds of it.That looks like your problem.The flat 4 pin isn't as good but it helps if you don't have the P4 plug.Plus your power supply might be junk on top of that.

 

[JuicyFruit]

omg, this is really odd. i plugged the 4 pin flat molex back in and the readings are the same. wth? i'll take your advice and try to find a ps to play with. i wonder if the ps is what's holding me back on my ocing ventures. of course it's not reaching higher fsbs if my mobo's not getting enough juice to my 1.8. arrghhh.

just played with prime again and as soon as i stop it, boom, back up to 1.7v. during. . . 1.6v most of the time, sometimes hitting 1.616v? aaaaaahhhhhhhh!!!!!!!:|

if i have to get another ps, my 420w is gonna go to waste . man, this sucks.

 

[LastRide]

Yep,sounds like you need to try another PS.Find one with a P4 connector if possible.You can try and unplug the molex connector and reinsert it in case its not in all the way in the mean time.You can do a little better O\Cing with a better PS with a P4 plug but you can tell your chip doesn't have what it takes.You would have to raise you voltage to 1.8V to get 1.7 under load and thats a little too much at idle.I switched out 2 mobo's for testing a 4G4A and the P4B533.The 4G4A was undervolting .05-065 under load.Its sitting in the closet now..lol.Sell your PS,just don't tell anybody I told you hehe.

 

[JuicyFruit]

 

[Big8oy]

hey all,
well i am a friend on Juicy Fruit and i am the one who just got the 2.53 P4. I have the same p4b533-e as juicy does and an enermax 431W ps. Well i just tried the testing of the ps under load and not. And my Vcore drops pretty low too under load. I dont get it. It's set at 1.65V in bios and idle it's 1.648-1.664. When under load it drops to 1.568-1.623. Based on what u guys have been saying, seems like my ps isn't too good either, but it's brand new! I dunno. I dont hit 3gig either. I only get 2.83. I have corsair xms 3200 mem too so ram shoudlnt be limiting me. I'm not sure what ppl are getting for OCs on the 2.53s. Is this a bad oc?

 

[Drsignguy]

Originally posted by: JuicyFruit
if i have to get another ps, my 420w is gonna go to waste . man, this sucks.

Here ,this is some good advice