View Full Version : Here is how Intel is OC Locking ther Procs.
PhreakinSyco
06-21-04, 01:34 PM
http://www.tomshardware.com/hardnews/20040619_110346.html
So it looks like when you overclock one of these new Intels. Once you get the processor 10% out of spec you are gaurnteed a nice crash.
FreakinSyco
theflyingrat
06-21-04, 02:27 PM
I also saw that today (it was linked from ArsTechnica...) It's too bad; I'm wondering and waiting intently to see what SiS and VIA try, if anything, to get around this restriction. Not because I plan on buying one (I'm now grateful I got my Prescott before LGA775,) but because I'm just curious.
Perhaps if they find a way around it, they'll gain more market share... especially if they prove to have a high FSB ceiling. VIA is already going about putting AGP and PCI-E 16 on thier chipsets as officially supported, so I expect to see a lot of those floating around, even in OEMs.
The 3.4 a 3.6GHz Prescotts for LGA775 have up to 151W of power consumption / power dissipation and you want to overclock it? That is insane!
These data are valid for VID=1.425V:
119.0A * 1.27V = 151.13W 3.2 GHz (PRB 1)
119.0A * 1.27V = 151.13W 3.4 GHz (PRB 1)
Water cooling will be a must I hope via or SIS adds overclocking options because when you look at the whole of the new stuff alot of it is good PCI EX does not improve anything now but it will over the next year.
The 3.4 a 3.6GHz Prescotts for LGA775 have up to 151W of power consumption / power dissipation and you want to overclock it? That is insane!
These data are valid for VID=1.425V:
119.0A * 1.27V = 151.13W 3.2 GHz (PRB 1)
119.0A * 1.27V = 151.13W 3.4 GHz (PRB 1)
Its not 151....115 actually. Big difference :)
http://www.tweakers.net/nieuws/32994
And that is the MAXIMUM dissipated heat, nominal usage will be far lower. You are talking about power consumption (which is 151w, some of it is actually being useful ;)), but the heat dissipation is only part of it.
Its not 151....115 actually. Big difference :)
http://www.tweakers.net/nieuws/32994
And that is the MAXIMUM dissipated heat, nominal usage will be far lower. You are talking about power consumption (which is 151w, some of it is actually being useful ;)), but the heat dissipation is only part of it.
No. Power Consumption = Power Dissipation. What would you do with that 40W of excess power? Return it to motherboard? There can be only one output other than thermal - and that is signal output to chipset. But that is so low you can say power consumption equals power dissipation.
And the TDP you are refering to is just some kind of number Intel releases for all those trolls. If you think TDP has any meaning, then please answer me this:
Socket 478:
115W max / 103W TDP = 1.12
Socket LGA775:
151W max / 115W TDP = 1.31
According to Intel TDP is typical thermal power while executing publicly available software. But how can the ratio between max power and TDP be that much different just because socket change? You get it? TDP has nothing to do with thermal power, it is just a number for poor reviewers who can't read that small note under the TDP table saying TDP is thermal solution design point (taking in account duty cycles while overheating), not thermal power.
The CPU uses power. it does need that power to make calculations. Alot of the power it gets as an input, gets lost in the form of heat, because nothing related to electricity is 100% efficient.
The difference between the TDP and the total power (115w - 151w) is the amount of power that is efficiently used to do something, mostly to send electrical signals to other parts of the pc. The complete amount (151w) will eventually be transformed into heat, but not all in the CPU. The motherboard gets alot too, but its surface is MUCH bigger then the CPU, so you can easily lose 40watts there with only a small temperature increase.
The TDP is the amount of energy that gets transformed to heat on that 1 cm2 of CPU core. The rest does, too, but somewhere else in the PC, and only after it did something useful (transporting your data)
Intel Xeon MP datasheet - http://developer.intel.com/design/xeon/datashts/251931.htm.
On page 71, there are TDP numbers and also Maximum Processor Power numbers. For example 3GHz has a TDP of 85 and Maximum of 97. If you calculate Icc * Vcc, that is 66.5A * 1.461V (data from page 25), you have... 97W.
The same thing is true for P4, only that Maximum is not listed.
Yes, but it remains a fact that not all of the power that the CPU gets as input, is transformed to heat in that CPU.
It should make up for some difference, but its too late now for me to think clear and explain...will probably try tomorrow
Chocobo
06-23-04, 12:27 AM
MAN WTF? so are people just going to move to AMD now that intel is being gay and locking thier processors?
Thats what some will be thinking...but they don't know the entire story..AMD will be locking their CPU's as well.
:p
If intel manages to succesfully implement this, AMD eventually will, too.
Kuroimaho
06-23-04, 04:58 AM
I concur
If Intel can succesfully keep Mobo makers from totally breaking this lock, then very likely that AMD will lock their Cpu's as well.
I wonder what will be here if that happens, ppl will start to OC Via processors to 2 ghz to reach a 1 GHz P3 speed ^^;;;
markodude
06-23-04, 07:05 AM
I think it will be broken, actually considering buying an AA8 duramax but I dont know what the situation is with OCing yet so maybe I wait a bit.......I wonder if it is implemented in Noconas as well? I also wonder if the Noconas will continue the Xeon trend of unlocked multipliers - or is that to go too!
Kuroimaho
06-23-04, 07:22 AM
I consider a D0 now but I would stick it in my current Mobo, but actually looking forward to Desktop Dothans and how they OC so I hope you are right and the lock will be broken in a few months.
microfire
06-23-04, 08:40 AM
The 3.4 a 3.6GHz Prescotts for LGA775 have up to 151W of power consumption / power dissipation and you want to overclock it? That is insane!
These data are valid for VID=1.425V:
119.0A * 1.27V = 151.13W 3.2 GHz (PRB 1)
119.0A * 1.27V = 151.13W 3.4 GHz (PRB 1)
How is it possible that the 3.2 use exactly the same power as the 3.4?
Sounds like BS to me.
How is it possible that the 3.2 use exactly the same power as the 3.4?
Sounds like BS to me.
lower voltage probably?
intel plans on lowering the voltages on preshots even more with newer steppings.
dippy_skoodlez
06-23-04, 09:15 AM
Water cooling will be a must I hope via or SIS adds overclocking options because when you look at the whole of the new stuff alot of it is good PCI EX does not improve anything now but it will over the next year.
Look who's gonna be complaining about 3rd party chipsets now :rolleyes:
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