Try not to cringe... Pentium Extreme 955 Plugged into 945 Chipset

[jle]

To make a long story short I plugged a Pentium Extreme 955 3.46 ghz into an Asus P5LD2 motherboard which has the Intel 945 chipset (The CPU required the 975x chipset). I tried to power up the computer about 6 times (I have an Antec True Power 2.0 PS) and the PC would not POST. I then realized what I did. I am picking a new motherboard today with the 975x chipset. Two important questions.

Is the CPU fried??

Is the Asus P5LD2 fried?

Am I an idiot... yes

Thanks for a preview of what I will find out later today.

 

[AkumaX]

sounds lke your sol to me

 

[jle]

You think the power difference in the chipsets fried both?

 

[Bull Dog]

Is the CPU fried??
Well I guess you will find out when you have your 975Xx board.

 

[Keysplayr]

I dont think either of them are fried. The mobo just doesn't support the CPU. So, it wont boot.

 

[Markbnj]

^^ agreed, unless there is a substantial power difference.

 

[Cooler]

if your going to get $1000 CPU you better get a MOBO that can use it and not cheaper one. As one of the Few Intel EE owners here i do feel sorry for you. I think asus 955 chipset supports the chip with a bios patch not the 945.

 

[liebremx]

1. It's not fried. It's just the platform doesn't support it.
2. Either a 955x or a 975x mobo will do. Check here

 

[TrevorRC]

Originally posted by: jle
To make a long story short I plugged a Pentium Extreme 955 3.46 ghz into an Asus P5LD2 motherboard which has the Intel 945 chipset (The CPU required the 975x chipset). I tried to power up the computer about 6 times (I have an Antec True Power 2.0 PS) and the PC would not POST. I then realized what I did. I am picking a new motherboard today with the 975x chipset. Two important questions.

Is the CPU fried??

Is the Asus P5LD2 fried?

Am I an idiot... yes

Thanks for a preview of what I will find out later today.

Amazes me you're using a 1000 dollar CPU; and a motherboard that isn't compatible and an absolutely terrible PSU =/

Buy a new, quality motherboard that's compatible [the pin count should've told you that..] AND buy a new PSU.


--Trevor

 

[jle]

I did not pair the EE CPU and 945 motherboard to save money. It was done out of sheer stupidity.

The only reason i posted was to try to find out if i had fried the "$1000" CPU before i could test it for myself on a motherboard with the 975x chipset.

So thanks for the comments and sorry if i offended anyone with the grotesque pairing i attempted.

 

[ND40oz]

Originally posted by: TrevorRC

Originally posted by: jle
To make a long story short I plugged a Pentium Extreme 955 3.46 ghz into an Asus P5LD2 motherboard which has the Intel 945 chipset (The CPU required the 975x chipset). I tried to power up the computer about 6 times (I have an Antec True Power 2.0 PS) and the PC would not POST. I then realized what I did. I am picking a new motherboard today with the 975x chipset. Two important questions.

Is the CPU fried??

Is the Asus P5LD2 fried?

Am I an idiot... yes

Thanks for a preview of what I will find out later today.

Amazes me you're using a 1000 dollar CPU; and a motherboard that isn't compatible and an absolutely terrible PSU =/

Buy a new, quality motherboard that's compatible [the pin count should've told you that..] AND buy a new PSU.


--Trevor

What's wrong with an Antec True Power 2 power supply? I use the 550 EPS model with my 975 board, has the 24 pin, 8 pin EPS and two 6 pin PCI-E connectors. Powers my rig just fine. As far as I know, all the True Power 2.0 series are 24 pin, dual 12 volt rail power supplies.

 

[liebremx]

Originally posted by: TrevorRC

Buy a new, quality motherboard that's compatible [the pin count should've told you that..]

--Trevor

The processor pin count has nothing to do with the chipset (assuming you refer to the contacts in the LGA packaging as 'pins').

 

[Hanpan]

Both the processor and motherboard will be fine assuming you did not do anything else. IT simply will not boot because it is not supported.

 

[Dadofamunky]

I bet the CPU is just fine. I've seen that a hundred times.

 

[LouPoir]

Originally posted by: keysplayr2003
I dont think either of them are fried. The mobo just doesn't support the CPU. So, it wont boot.

I agree

 

[JEDIYoda]

can we say some people ought not be allowed to build a computer without parental supervision....

 

[TrevorRC]

Originally posted by: ND40oz

Originally posted by: TrevorRC

Originally posted by: jle
To make a long story short I plugged a Pentium Extreme 955 3.46 ghz into an Asus P5LD2 motherboard which has the Intel 945 chipset (The CPU required the 975x chipset). I tried to power up the computer about 6 times (I have an Antec True Power 2.0 PS) and the PC would not POST. I then realized what I did. I am picking a new motherboard today with the 975x chipset. Two important questions.

Is the CPU fried??

Is the Asus P5LD2 fried?

Am I an idiot... yes

Thanks for a preview of what I will find out later today.

Amazes me you're using a 1000 dollar CPU; and a motherboard that isn't compatible and an absolutely terrible PSU =/

Buy a new, quality motherboard that's compatible [the pin count should've told you that..] AND buy a new PSU.


--Trevor

What's wrong with an Antec True Power 2 power supply? I use the 550 EPS model with my 975 board, has the 24 pin, 8 pin EPS and two 6 pin PCI-E connectors. Powers my rig just fine. As far as I know, all the True Power 2.0 series are 24 pin, dual 12 volt rail power supplies.

Check the following site for some more info on Antec PSUs...
BadCaps


As for the common-sense-it's-too-weak... read below:

Look at where the amperage is distributed.. 2x19A 12v Rails; but 40A on the 5V rail [hiding power on the 5V!]... so more 1/3 of the power is coming off of the 5V rail.
As for the 3.3...30 odd amps there. So another 100W.
So, 550W-100W-200W = 350W left for the 12V rails. [175W EACH RAIL, and you can not combine the two, the power is seperate!]

Assuming the CPU takes 168 Watts Idle, 267W Load
[According to this site]
That's 267/12 = 22.25A load. No overclocking. That EXCEEDS the maximum amperage of a single rail on the Antec PSU. [19A] Poof.

Not even mentioning the video cards.. an X1800XT can take in 120W, unoverclocked. Add in some overclocking... and it only gets worse.

267+120 > 350, last time I checked... and that 550W is most likely peak, eh?
It'd die first when you loaded the CPU, then it'd roll over in it's grave when you tried to load the GPU. Not even going to MENTION SLi.

This is WITHOUT OVERCLOCKING, and the PSU is already too weak.

My advice, grab a high amperage single-rail PSU; you'll be fine.
If you want, try to run your system... as soon as you start up Prime95 you'll see the problems.
--Trevor

 

[TrevorRC]

Originally posted by: JEDIYoda
can we say some people ought not be allowed to build a computer without parental supervision....

Haha, just saw this post.

I guess. But, you have to learn somehow
--Trevor

 

[DrMrLordX]

Better to learn on a Celeron or Sempron than a 955EE

 

[theMan]

probably not, its just that the mobo couldnt recognise the cpu.

 

[imported_Seer]

Originally posted by: TrevorRC

Originally posted by: ND40oz

Originally posted by: TrevorRC

Originally posted by: jle
To make a long story short I plugged a Pentium Extreme 955 3.46 ghz into an Asus P5LD2 motherboard which has the Intel 945 chipset (The CPU required the 975x chipset). I tried to power up the computer about 6 times (I have an Antec True Power 2.0 PS) and the PC would not POST. I then realized what I did. I am picking a new motherboard today with the 975x chipset. Two important questions.

Is the CPU fried??

Is the Asus P5LD2 fried?

Am I an idiot... yes

Thanks for a preview of what I will find out later today.

Amazes me you're using a 1000 dollar CPU; and a motherboard that isn't compatible and an absolutely terrible PSU =/

Buy a new, quality motherboard that's compatible [the pin count should've told you that..] AND buy a new PSU.


--Trevor

What's wrong with an Antec True Power 2 power supply? I use the 550 EPS model with my 975 board, has the 24 pin, 8 pin EPS and two 6 pin PCI-E connectors. Powers my rig just fine. As far as I know, all the True Power 2.0 series are 24 pin, dual 12 volt rail power supplies.

Check the following site for some more info on Antec PSUs...
BadCaps


As for the common-sense-it's-too-weak... read below:

Look at where the amperage is distributed.. 2x19A 12v Rails; but 40A on the 5V rail [hiding power on the 5V!]... so more 1/3 of the power is coming off of the 5V rail.
As for the 3.3...30 odd amps there. So another 100W.
So, 550W-100W-200W = 350W left for the 12V rails. [175W EACH RAIL, and you can not combine the two, the power is seperate!]

Assuming the CPU takes 168 Watts Idle, 267W Load
[According to this site]
That's 267/12 = 22.25A load. No overclocking. That EXCEEDS the maximum amperage of a single rail on the Antec PSU. [19A] Poof.

Not even mentioning the video cards.. an X1800XT can take in 120W, unoverclocked. Add in some overclocking... and it only gets worse.

267+120 > 350, last time I checked... and that 550W is most likely peak, eh?
It'd die first when you loaded the CPU, then it'd roll over in it's grave when you tried to load the GPU. Not even going to MENTION SLi.

This is WITHOUT OVERCLOCKING, and the PSU is already too weak.

My advice, grab a high amperage single-rail PSU; you'll be fine.
If you want, try to run your system... as soon as you start up Prime95 you'll see the problems.
--Trevor

Isn't the point of dual 12v rails to split the load across both of them? As in half the wires go to one rail and the other half go to the other? Why are you just throwing out the second rail?

Edit: I checked out that site, and I couldn't really find anything on antec PSUs, except for one thread in the forum where someone said " Post your bad experiences with Antec power supplies here!" There were only 45 replies over the span of 4 months, and not every reply talked about a bad psu. Doesn't seem that bad to me.

 

[TrevorRC]

Yes, that is/was the original intent.. issue being that you might have an extra 7A on one rail [which isn't enough to power the GPU]; so you switch to the second.. and when you switch to the 2nd rail; you run into problems when you add another video card, or lots of periphreals..

In this case, there are two problems., there simply isn't enough amperage to go around on each rail. One rail can't 'draw power' from another [over its maximum spec. Certain PSUs, i.e. the Strider ST60F, can have 18A on the 4th rail though it is only rated for 8... but this is only if one of the other rails is unloaded]; so the major components are split onto different rails.

When he loads the PSU, there won't be enough amperage on the 12V1 rail; and the PSU will shut off.
The second rail would have enough power to supplement it, but they're separate. [Not even taking the GPU into account].

Basically, there isn't enough amperage to begin with... and when you split it onto two rails, the problem is made even worse. [AMD systems work well with Multi-rails; because the power consumption is substantially lower...but Intel Procs need lots more power than AMD; especially in the dual core case [2x as much].

Check most high end PSUs [server class/etc.] -the majority of good mfgs [Zippy/Emacs/etc.] are all single rail, high amperage PSUs.
Example being:
http://www.zippy.com.tw/P_product_detai...fnbr=5&pp_code=Gaming%A1EGSM-6600P(G1)

40A on single 12v rail.

As for the bad caps...
http://www.badcaps.net/forum/showthread.php?t=388&highlight=Fuhjyyu
Fuhjyyu supplies caps for Clear Well, Antec's OEM. Keep reading a bit more
--Trevor