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Help Finding The Best CPU For P4SD-VX Motherboard.

Hey there, i have a Sony Vaio model : PCV-RZ31G. The motherboard is a P4SD Vx and the bus clock is 200mgz. I need help with finding the best processor or at least finding out what cpu my motherboard can handle. Any help would be great.

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  • kevin_liesko Nov 16, 2009

    It seems to me by using CPU-Z That my clock multiplyer is X 13.0 It says under the CPU tab that the core voltage is running at around 2.6V. and not sure if its relevent but under the SPD tab it says the voltage is 2.5 V for both JEDEC#1 and JEDEC#2. And its a 478 socket

  • joecoolvette
    joecoolvette May 11, 2010

    If your Sony is working, and internet capable, I'd like to suggest that you download the tiny, free program CPU-Z from CPUID.com This should give detailed specifications on your motherboard, (Mainboard) Need to know what the clock multiplier is, and the voltage for the processor. Also, is it using the LGA 775 processor socket, or the Socket 478? (If you have any problems trying to download CPU-Z, let me know)

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Brilliant, I commend you! I've posted using the simple CPU-Z program to several people on here, and they just don't seem to get it!

Sony doesn't release detailed info on their motherboards, for the most part. Just the usual generic info.

2.6 Volts?
Open CPU-Z again. CPU tab.
Let's see if you have this processor.
Name: Pentium 4 HT 2.6C
Code Name: Northwood
Package: Socket 478
Technology: 130nm
Core Speed: 2600.0MHz (Fluctuates when the computer is running)
Multiplier: 13X (Fluctuates when the computer is running. When the Core Speed fluctuates enough, the multiplier changes to match)

Bus Speed: 200.0MHz
Rated FSB: 800.0MHz
Voltage: 1.475 to 1.525 V (Fluctuates)

Click on the Mainboard tab.
Is the motherboard chipset Intel 865PE?
[Chipset: Intel i865PE
Southbridge: ICH5 or ICH5R
Motherboard made by Asus?

It may not have an Auto CPU feature in BIOS Setup then. Means you cannot just put any old processor in there. Have you been into your BIOS Setup yet?

SPD stands for Serial Presence Detect. This is used by BIOS to automatically detect what ram memory is being used, and the ram memory timings.

JEDEC was Joint Electron Device Engineering Council/s. Changed to JEDEC Solid State Technology Association.

One of the things they have done is to set standards for Ram Memory.
Voltages used and ram timings.
JEDEC 1 is the ram memory module, in Slot 1 on your computer.
(May state DIMM 1 on the motherboard)
JEDEC 2 is the ram memory module, (Stick) in Slot 2.

JEDEC set the voltage standard for DDR Sdram ram memory, at 2.5 Volts. Your computer has DDR Sdram ram memory in it.
The default voltage setting from the factory will be 2.5 volts for your computer.


Posted on Nov 16, 2009

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