SOLVED Intel Xeon E5420 SLANV CPU on core 2 duo motherboard.

acrilex · May 27, 2014

Hello,

Do you think I can run this cpu: Intel Xeon E5420 SLANV CPU on an asus p5bw-la (HP OEM board). I know this is a 1333mhz cpu, but I searched and it appears it doesn't mather. What I really wanna know is if this line on HP's website:

CPU/Processor
Socket: 775
Supports the following processors:
Intel Core 2 Duo E6x00 with Dual Core technology (Conroe core)
Pentium D 9x0 series Dual Core (Presler)
Pentium D 8xx series (Smithfield)
Pentium 4 6x1 series (Cedar Mill core)
Pentium 4 6xx series (Prescott core)
Pentium 4 5xx series (Prescott core)CPU/Processor
Socket: 775
Supports the following processors:
Intel Core 2 Duo E6x00 with Dual Core technology (Conroe core)
Pentium D 9x0 series Dual Core (Presler)
Pentium D 8xx series (Smithfield)
Pentium 4 6x1 series (Cedar Mill core)
Pentium 4 6xx series (Prescott core)
Pentium 4 5xx series (Prescott core)
Pentium 4 LGA-775 HT (Prescott core)
Pentium 4 LGA-775 HT (Prescott core)

It says that the best supported CPU is c2d E6x00. Can I still put the Xeon with a 771 to 775 mod on the motherboard or will it refuse to boot?

EarthDog · May 27, 2014

If it is not on the list, I wouldn't take the risk.

This may help: http://vip.asus.com/forum/view.aspx?id=20071230113154265&board_id=1&model=P5B&pa..

acrilex · May 27, 2014

Do you think it is blocked in the BIOS, or is it a hardware limitation? I don't see any limitation of any kind. Normally core 2 quad CPUs or supported on Core 2 Duo socket

EarthDog · May 27, 2014

Its a Xeon chip.. so microcode may need to be there. I am not sure.

wagex · May 27, 2014

it wont work its a 1333 chip that is a 1066 motherboard.

acrilex · May 27, 2014

I know, but apparently if we look at many places it shouldn't mather. The only remaining thing is maybe the 45 nm problem. The original cpu is 65nm, but i looked and only a bios upgrade should do the job. Do you think it will do it?

wagex · May 27, 2014

1066 motherboard will not support a 1333 cpu.
trust me ive tried it.
wont work
nope.
i have a couple boards at home they are 1066 max, try to put a e6750 or xeon e5345 in them, nope wont work. they are 1333 chips. 1066 boards creek and cry like school girls when they are forced to take a 1333 they just cannot take that much.

acrilex · May 27, 2014

I found this one too: Intel Core 2 Quad Q6600

Will it work? This is a little more expensive, but should do the job.

EarthDog · May 27, 2014

If its not on the compatibility list, I wouldn't risk it.

wagex · May 27, 2014

is it on the list?

acrilex · May 27, 2014

No. But it is 65nm and 1066mhz

wagex · May 27, 2014

http://vip.asus.com/forum/view.aspx?id=20071230113154265&board_id=1&model=P5B&pa
according to these guys they work fine in their boards, but i cannot say for certain myself.

if its not on the list then i am not responsible.

acrilex · May 27, 2014

Tank you very much! I will further see with bios-mods forum if it doesn't work because of bios problem.

RJARRRPCGP · May 27, 2014

acrilex said:
Hello,

Do you think I can run this cpu: Intel Xeon E5420 SLANV CPU on an asus p5bw-la (HP OEM board). I know this is a 1333mhz cpu, but I searched and it appears it doesn't mather. What I really wanna know is if this line on HP's website:

CPU/Processor
Socket: 775
Supports the following processors:
Intel Core 2 Duo E6x00 with Dual Core technology (Conroe core)
Pentium D 9x0 series Dual Core (Presler)
Pentium D 8xx series (Smithfield)
Pentium 4 6x1 series (Cedar Mill core)
Pentium 4 6xx series (Prescott core)
Pentium 4 5xx series (Prescott core)CPU/Processor
Socket: 775
Supports the following processors:
Intel Core 2 Duo E6x00 with Dual Core technology (Conroe core)
Pentium D 9x0 series Dual Core (Presler)
Pentium D 8xx series (Smithfield)
Pentium 4 6x1 series (Cedar Mill core)
Pentium 4 6xx series (Prescott core)
Pentium 4 5xx series (Prescott core)
Pentium 4 LGA-775 HT (Prescott core)
Pentium 4 LGA-775 HT (Prescott core)

It says that the best supported CPU is c2d E6x00. Can I still put the Xeon with a 771 to 775 mod on the motherboard or will it refuse to boot?

Looks like the board don't even support 45 nm.

Looks like it may basically be a Q9450 with the multi at 7.5 instead of 8.0.

EarthDog · May 27, 2014

Isnt Q9450 45nm Yorkfield?

RJARRRPCGP · May 27, 2014

EarthDog said:
Isnt Q9450 45nm Yorkfield?

I was talking about how some Xeons were basically the same thing as 775, but with a pin or 2.....

And yes, that's a Yorkfield.

wagex · May 28, 2014

RJARRRPCGP said:
I was talking about how some Xeons were basically the same thing as 775, but with a pin or 2.....

And yes, that's a Yorkfield.

all 771 xeons are the same as their 775 counterparts some 65nm some 45nm and they only have two pins different along with their alignment in the socket, they make a sticker thing that sticks on the bottom to swap the two pins around i have an e5345 xeon running in a 775 board but it supports 1333fsb cpu's.

SOLVED Intel Xeon E5420 SLANV CPU on core 2 duo motherboard.

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