Power Supply issues

How much is it an issue the
power supply when overclocking
a Pentium D 805?

I have a cheapo supply right now
15A 3.3V
30A 5V
15A 12V

pretty cheap...but hey it gets me
3.2Ghz from a 2.66Ghz chip.

I also have a server supply (Topower)
which is rated at

26A 3.3V
42A 5V
18A 12V

The 5V and the 3V volts supply the chip right?

Eventhough its 24 pins...I can just plug it into a 20 pin connector
right.

Would I be wiser to use the server supply instead.

Any help would be appreciated.

'Don W. McCollough' wrote, in part:
| How much is it an issue the
| power supply when overclocking
| a Pentium D 805?
|
_____

The CPU alone is not enough information.
If you don't have enough power, it is a very big issue.
If you have just enough power, an issue will arise sooner or later.

Do you intend to overclock?
What motherboard do you intend to use?
What Graphics Adapter?
What drives?

'Cheapo supply' is not enough information.
What version of ATX power supply standards does it meet?
What is its total power rating?

The most important voltage is + 12 Volts as that furnishes power for the CPU
and any high performance graphics adapters, as well as for the motors that
rotate hard drives and removable media drives. (15A X 12V) = 18 Watts;
early enough for the CPU alone, especially when overclocking.

Your 'server supply' is an old one, since the +5 volt amperage (42 A) and
the +3.3 volt amperage (26 A) are far more than is needed for any recent
system (it is not an ATX 12V standard.) The +12 V amperage is barely
adequate for a standard Pentium D 805 system with a low power graphics
adapter.

| the 5V and the 3V volts supply the chip right?

Wrong.

| Eventhough its 24 pins...I can just plug it into a 20 pin connector right

Wrong.

| Would I be wiser to use the server supply instead.

Don't use either one.

If you post more details, you will probably get power supply
recommendations. You need a power supply that meets ATX12V 2.03
specifications; see
http://www.formfactors.org/developer...public_br2.pdf .
(Unless you use a micro form factor case)

Phil Weldon




"Don W. McCollough" wrote in message
news:cIXrg.2222$F8.878@trnddc02...
| How much is it an issue the
| power supply when overclocking
| a Pentium D 805?
|
| I have a cheapo supply right now
| 15A 3.3V
| 30A 5V
| 15A 12V
|
| pretty cheap...but hey it gets me
| 3.2Ghz from a 2.66Ghz chip.
|
| I also have a server supply (Topower)
| which is rated at
|
| 26A 3.3V
| 42A 5V
| 18A 12V
|
| The 5V and the 3V volts supply the chip right?
|
| Eventhough its 24 pins...I can just plug it into a 20 pin connector
| right.
|
| Would I be wiser to use the server supply instead.
|
| Any help would be appreciated.
|
|

"Phil Weldon" wrote in message
ink.net...
'Don W. McCollough' wrote, in part:
| How much is it an issue the
| power supply when overclocking
| a Pentium D 805?
|
_____

The CPU alone is not enough information.
If you don't have enough power, it is a very big issue.
If you have just enough power, an issue will arise sooner or later.

Do you intend to overclock?

As much as is feasible. I'm just curious whether I have a snafu
with my motherboard or my power supply.

What motherboard do you intend to use?

ASROCK 775Dual-880Pro PT880

Cheap! I bought it at newegg for $30.

What Graphics Adapter?

VGA ASUS N EN7600GS SILENT PCI-Ex.

I was going to use a N6800XT AGP, but I couldn't
handle the noise.

What drives?

Well, I'm using a Fujitsu MAS 15K RPM drive for the C:
1- 250- GB Western Digitial PATA
2- 250- GB Seagate ATA 100s
1- 200- GB Seagate ATA 100
1- Panasonic DVD multidrive.


'Cheapo supply' is not enough information.
What version of ATX power supply standards does it meet?

Dunno...it say that its a 400watt supply...but I have a 24pin Topower
server supply thats rated at 420watts and it much better built and supply
way more amperage accross the board.

What is its total power rating?

The most important voltage is + 12 Volts as that furnishes power for the
CPU
and any high performance graphics adapters, as well as for the motors that
rotate hard drives and removable media drives. (15A X 12V) = 18 Watts;


You mean 180watts.

The intel product data sheet says that the 3.2 Pentium D "8" series uses
130Watts at 3.2Ghz...so
maybe 160 watts isn't inconceivable when the processor is clocked a 3.5ghz?

early enough for the CPU alone, especially when overclocking.

Your 'server supply' is an old one, since the +5 volt amperage (42 A) and
the +3.3 volt amperage (26 A) are far more than is needed for any recent
system (it is not an ATX 12V standard.) The +12 V amperage is barely
adequate for a standard Pentium D 805 system with a low power graphics
adapter.

Its for a dual Xeon 604 system I used to have. Its a Topower supply...they
basically
invented the 24 pin server power supply...at least they're suing to make it
so.

| the 5V and the 3V volts supply the chip right?

Wrong.

Hmm. I thought that the drives used 12V and the motherboard used the 5V and
3.3V...
guess I didn't know...


| Eventhough its 24 pins...I can just plug it into a 20 pin connector
right

Wrong.

| Would I be wiser to use the server supply instead.

Don't use either one.

Makes sense. Wont try that.

If you post more details, you will probably get power supply
recommendations. You need a power supply that meets ATX12V 2.03
specifications; see
http://www.formfactors.org/developer...public_br2.pdf
.
(Unless you use a micro form factor case)


I look into it. 2.03 eh?

How about this one?

http://www.geeks.com/details.asp?inv...PWR&cpc=PWRbsc

or this one

http://www.geeks.com/details.asp?Inv...480W&cpc=RECOM

give me an example...please :-)

Thanks. I know Phil has been posting here quite a while.




Phil Weldon




"Don W. McCollough" wrote in message
news:cIXrg.2222$F8.878@trnddc02...
| How much is it an issue the
| power supply when overclocking
| a Pentium D 805?
|
| I have a cheapo supply right now
| 15A 3.3V
| 30A 5V
| 15A 12V
|
| pretty cheap...but hey it gets me
| 3.2Ghz from a 2.66Ghz chip.
|
| I also have a server supply (Topower)
| which is rated at
|
| 26A 3.3V
| 42A 5V
| 18A 12V
|
| The 5V and the 3V volts supply the chip right?
|
| Eventhough its 24 pins...I can just plug it into a 20 pin connector
| right.
|
| Would I be wiser to use the server supply instead.
|
| Any help would be appreciated.
|
|

Don W. McCollough wrote:
If you post more details, you will probably get power supply
recommendations. You need a power supply that meets ATX12V 2.03
specifications; see
http://www.formfactors.org/developer...public_br2.pdf
(Unless you use a micro form factor case)

I look into it. 2.03 eh?
How about this one?
http://www.geeks.com/details.asp?inv...PWR&cpc=PWRbsc

I can see you're shopping with a tight budget. This powersupply has only 19
Amps on the 12V rail. Even my Enermax 365 Watt can beat that.

or this one
http://www.geeks.com/details.asp?Inv...480W&cpc=RECOM

Even worse, only 17 Amps on the 12V rail...

give me an example...please :-)

If you can afford it, get an Enermax / Antec / A-Open... You pay more, but
you get more. My Enermax lkasted me three generations of PC's.

For example:
http://www.geeks.com/details.asp?inv...400-DT&cat=CAS
Even this 'lowly' 400 Watt Antec supports 10 and 15 amps on the two 12V
rails (total = 25)...

http://www.geeks.com/details.asp?inv...430-DT&cat=CAS
This Antec 430 Watt even sports 17 amps on BOTH 12V rails, a whopping total
of 34 Amps on 12V!

--
Grtz, Thomas

Thomas wrote:
Don W. McCollough wrote:
If you post more details, you will probably get power supply
recommendations. You need a power supply that meets ATX12V 2.03
specifications; see
http://www.formfactors.org/developer...public_br2.pdf
(Unless you use a micro form factor case)

I look into it. 2.03 eh?
How about this one?
http://www.geeks.com/details.asp?inv...PWR&cpc=PWRbsc

I can see you're shopping with a tight budget. This powersupply has
only 19 Amps on the 12V rail. Even my Enermax 365 Watt can beat that.

http://www.coolergiant.co.uk/product...g)fma/spec.asp

or this one
http://www.geeks.com/details.asp?Inv...480W&cpc=RECOM

Even worse, only 17 Amps on the 12V rail...

give me an example...please :-)

If you can afford it, get an Enermax / Antec / A-Open... You pay
more, but you get more. My Enermax lkasted me three generations of
PC's.
For example:
http://www.geeks.com/details.asp?inv...400-DT&cat=CAS
Even this 'lowly' 400 Watt Antec supports 10 and 15 amps on the two
12V rails (total = 25)...

http://www.geeks.com/details.asp?inv...430-DT&cat=CAS
This Antec 430 Watt even sports 17 amps on BOTH 12V rails, a whopping
total of 34 Amps on 12V!

"Thomas" wrote in message
...
Don W. McCollough wrote:
If you post more details, you will probably get power supply
recommendations. You need a power supply that meets ATX12V 2.03
specifications; see
http://www.formfactors.org/developer...public_br2.pdf
(Unless you use a micro form factor case)

I look into it. 2.03 eh?
How about this one?
http://www.geeks.com/details.asp?inv...PWR&cpc=PWRbsc

I can see you're shopping with a tight budget. This powersupply has only
19 Amps on the 12V rail. Even my Enermax 365 Watt can beat that.

or this one
http://www.geeks.com/details.asp?Inv...480W&cpc=RECOM

Even worse, only 17 Amps on the 12V rail...

give me an example...please :-)

If you can afford it, get an Enermax / Antec / A-Open... You pay more, but
you get more. My Enermax lkasted me three generations of PC's.

For example:
http://www.geeks.com/details.asp?inv...400-DT&cat=CAS
Even this 'lowly' 400 Watt Antec supports 10 and 15 amps on the two 12V
rails (total = 25)...

http://www.geeks.com/details.asp?inv...430-DT&cat=CAS
This Antec 430 Watt even sports 17 amps on BOTH 12V rails, a whopping
total of 34 Amps on 12V!


Thomas...thanks for being helpful. I noticed on the specs for the Antec
430
http://www.antec.com/specs/TPII430_spe.html
that it had a secondary 17A 12V2 output. Would that secondary output
be the 12V supply in the separate 4pin (P4) style connector...or the extra 4
pin
connector that attaches to the 20pin ATX connector?

Just curious.

And do you know of any websites that demonstrate the performance of a system
by showing how 2 different power supply (one cheap and one specialized) run
an OCed system.

Though I could just do a google myself...

Don

--
Grtz, Thomas

'Don W. McCollough' wrote, in part:
| Well, I'm using a Fujitsu MAS 15K RPM drive for the C:
| 1- 250- GB Western Digitial PATA
| 2- 250- GB Seagate ATA 100s
| 1- 200- GB Seagate ATA 100
| 1- Panasonic DVD multidrive.
|
|
| 'Cheapo supply' is not enough information.
| What version of ATX power supply standards does it meet?
|
| Dunno...it say that its a 400watt supply...but I have a 24pin Topower
| server supply thats rated at 420watts and it much better built and
supply
| way more amperage accross the board.
_____

There is a very good reason for getting a high quality power supply when
overclocking. It eliminates one more variable that could make the CPU
unstable. Overclocking requires tradeoffs. Intel engineers and produces
CPUs with a good margin of stability. Raising the core voltage and reducing
the operating temperature helps extend the margin of stability, resulting in
higher overclock possibilities. Any problems with the power for the CPU and
interface chips reduce the margin of stability. Unless you have done a lot
of overclocking, it is a good idea to eliminate as many possible problems
before you start.

You can certainly overclock with cheap, marginal power supplies ( I
certainly have, back in the days when 60 Watts was a big draw for a CPU )
.... but the results will likely be longer coming and slower. The two power
supplies you original posted are too old to even reach marginal for your
proposed CPU.

On the other hand, your motherboard is problematical also, so maybe you
should just try the power supplies you already have. It makes me wonder,
however, why you are stinting on the motherboard and power supply when you
list three 250 GByte hard drives plus a 15,000 rpm hard drive; those four
drives, if they spin up at the same time, will draw, during spin-up, over 8
amperes from the + 12 V supply. Also, you really shouldn't put a hard drive
on the same channel as a DVD drive, as the DVD drive will slow the
performance of the hard drive.

Research twice, cut once.

Good luck.

Phil Weldon

"Don W. McCollough" wrote in message
news:jm3sg.2943$pB.1420@trnddc06...
|
| "Don W. McCollough" wrote in message
| news:Bg3sg.2940$pB.1166@trnddc06...
|
| "Phil Weldon" wrote in message
| ink.net...
| 'Don W. McCollough' wrote, in part:
| | How much is it an issue the
| | power supply when overclocking
| | a Pentium D 805?
| |
| _____
|
| The CPU alone is not enough information.
| If you don't have enough power, it is a very big issue.
| If you have just enough power, an issue will arise sooner or later.
|
| Do you intend to overclock?
|
| As much as is feasible. I'm just curious whether I have a snafu
| with my motherboard or my power supply.
|
| What motherboard do you intend to use?
|
| ASROCK 775Dual-880Pro PT880
|
| Cheap! I bought it at newegg for $30.
|
| What Graphics Adapter?
|
| VGA ASUS N EN7600GS SILENT PCI-Ex.
|
| I was going to use a N6800XT AGP, but I couldn't
| handle the noise.
|
| What drives?
|
| Well, I'm using a Fujitsu MAS 15K RPM drive for the C:
| 1- 250- GB Western Digitial PATA
| 2- 250- GB Seagate ATA 100s
| 1- 200- GB Seagate ATA 100
| 1- Panasonic DVD multidrive.
|
|
| 'Cheapo supply' is not enough information.
| What version of ATX power supply standards does it meet?
|
| Dunno...it say that its a 400watt supply...but I have a 24pin Topower
| server supply thats rated at 420watts and it much better built and
supply
| way more amperage accross the board.
|
| What is its total power rating?
|
| The most important voltage is + 12 Volts as that furnishes power for
the
| CPU
| and any high performance graphics adapters, as well as for the motors
| that
| rotate hard drives and removable media drives. (15A X 12V) = 18 Watts;
|
|
| You mean 180watts.
|
| The intel product data sheet says that the 3.2 Pentium D "8" series uses
| 130Watts at 3.2Ghz...so
| maybe 160 watts isn't inconceivable when the processor is clocked a
| 3.5ghz?
|
| early enough for the CPU alone, especially when overclocking.
|
| Your 'server supply' is an old one, since the +5 volt amperage (42 A)
and
| the +3.3 volt amperage (26 A) are far more than is needed for any
recent
| system (it is not an ATX 12V standard.) The +12 V amperage is barely
| adequate for a standard Pentium D 805 system with a low power graphics
| adapter.
|
| Its for a dual Xeon 604 system I used to have. Its a Topower
| supply...they basically
| invented the 24 pin server power supply...at least they're suing to make
| it so.
|
| | the 5V and the 3V volts supply the chip right?
|
| Wrong.
|
| Hmm. I thought that the drives used 12V and the motherboard used the 5V
| and 3.3V...
| guess I didn't know...
|
|
| | Eventhough its 24 pins...I can just plug it into a 20 pin connector
| right
|
| Wrong.
|
| | Would I be wiser to use the server supply instead.
|
| Don't use either one.
|
| Makes sense. Wont try that.
|
| If you post more details, you will probably get power supply
| recommendations. You need a power supply that meets ATX12V 2.03
| specifications; see
|
http://www.formfactors.org/developer...public_br2.pdf
| .
| (Unless you use a micro form factor case)
|
|
| I look into it. 2.03 eh?
|
| How about this one?
|
| http://www.geeks.com/details.asp?inv...PWR&cpc=PWRbsc
|
| or this one
|
| http://www.geeks.com/details.asp?Inv...480W&cpc=RECOM
|
| give me an example...please :-)
|
| Thanks. I know Phil has been posting here quite a while.
|
| Well, if my memory serves me.
|
| Anyway...here's one on Ebay that looks interesting.
|
|
http://cgi.ebay.com/New-600-Watt-ATX...QQcmdZViewItem
|
|
|
|
|
|
| Phil Weldon
|
|
|
|
| "Don W. McCollough" wrote in message
| news:cIXrg.2222$F8.878@trnddc02...
| | How much is it an issue the
| | power supply when overclocking
| | a Pentium D 805?
| |
| | I have a cheapo supply right now
| | 15A 3.3V
| | 30A 5V
| | 15A 12V
| |
| | pretty cheap...but hey it gets me
| | 3.2Ghz from a 2.66Ghz chip.
| |
| | I also have a server supply (Topower)
| | which is rated at
| |
| | 26A 3.3V
| | 42A 5V
| | 18A 12V
| |
| | The 5V and the 3V volts supply the chip right?
| |
| | Eventhough its 24 pins...I can just plug it into a 20 pin connector
| | right.
| |
| | Would I be wiser to use the server supply instead.
| |
| | Any help would be appreciated.
| |
| |
|
|
|
|
|
|

"Phil Weldon" wrote in message
ink.net...
'Don W. McCollough' wrote, in part:
| Well, I'm using a Fujitsu MAS 15K RPM drive for the C:
| 1- 250- GB Western Digitial PATA
| 2- 250- GB Seagate ATA 100s
| 1- 200- GB Seagate ATA 100
| 1- Panasonic DVD multidrive.
|
|
| 'Cheapo supply' is not enough information.
| What version of ATX power supply standards does it meet?
|
| Dunno...it say that its a 400watt supply...but I have a 24pin Topower
| server supply thats rated at 420watts and it much better built and
supply
| way more amperage accross the board.
_____

There is a very good reason for getting a high quality power supply when
overclocking. It eliminates one more variable that could make the CPU
unstable. Overclocking requires tradeoffs. Intel engineers and produces
CPUs with a good margin of stability. Raising the core voltage and
reducing
the operating temperature helps extend the margin of stability, resulting
in
higher overclock possibilities. Any problems with the power for the CPU
and
interface chips reduce the margin of stability. Unless you have done a
lot
of overclocking, it is a good idea to eliminate as many possible problems
before you start.



Cheap power supplies are one of the top sources for intermittent tyoe
failures that are difficult to troubleshoot. Random rebooting, BSOD's,
"windows has just recovered from a system error" (if you're lucky) etc,
etc. Cheap PSU's proabably cause more RMA's of perfectly good components
than say "buyers remorse".

Don W. McCollough wrote:
give me an example...please :-)

If you can afford it, get an Enermax / Antec / A-Open... You pay
more, but you get more. My Enermax lkasted me three generations of
PC's. For example:
http://www.geeks.com/details.asp?inv...400-DT&cat=CAS
Even this 'lowly' 400 Watt Antec supports 10 and 15 amps on the two
12V rails (total = 25)...

http://www.geeks.com/details.asp?inv...430-DT&cat=CAS
This Antec 430 Watt even sports 17 amps on BOTH 12V rails, a whopping
total of 34 Amps on 12V!

Thomas...thanks for being helpful. I noticed on the specs for the
Antec 430
http://www.antec.com/specs/TPII430_spe.html
that it had a secondary 17A 12V2 output. Would that secondary output
be the 12V supply in the separate 4pin (P4) style connector...or the
extra 4 pin
connector that attaches to the 20pin ATX connector?

I read that 1 rail is for the processor, while the other rail is for the
rest. It seems logical that you're right :-)

Just curious.

And do you know of any websites that demonstrate the performance of a
system by showing how 2 different power supply (one cheap and one
specialized) run an OCed system.

PSU doesn't mean anything to performance. A PSU will either be strong enough
for your system, or not strong enough. If not strong enough, it won't boot.
If JUST strong enough, you'll hover on the very edge of stability, which is
where many problems with the ****ty low-cost PSU's comes from...
A better PSU improves stability and ensures you that you wont have a
PSU-blowout, that takes out your mainboard.

--
Thomas.

"Leadfoot" wrote in message
news:HLvsg.563$_M.374@fed1read04...

snip

Cheap power supplies are one of the top sources for intermittent tyoe
failures that are difficult to troubleshoot. Random rebooting, BSOD's,
"windows has just recovered from a system error" (if you're lucky) etc,
etc. Cheap PSU's proabably cause more RMA's of perfectly good components
than say "buyers remorse".


Ditto!

"buyers remorse" - ...cute! ))