When I change the mobo jumpers from 100 MHz for 1.90 on the CPU to 133 MHz for the 2.53 the CPU is rated at, it won't boot.

Is Cpu installed correctly ? easy to bend pins on X2's...
using a flat screwdriver make a connection between 2 pins on PWR only, disconnect everything else exept Mobo to do this just to see if you get boot to Bios, alter jumpers as you go

According to the Asrock site, the CPU you chose should work in your board. You are going to have to check the jumper settings, (see the manual page 11) jumpers J1,J2,J3,J4,J5,J6,J8,J9,J10,J11,J12,J13,J18,J21 only. You indicated that you also changed J7,J14,J15,J16,J17,J19,and J20 since your statement was "i looked at the manual and changed the jumper settings from J1-J21"

Also make sure you do not have a jumper block on the CLR CMOS down near the battery. If you left a jumper on, it will not boot

Also, make sure you installed the CPU correctly and did not accidentally bend a pin on the underside. see 2.2 on page 12 Installing the 775.

Specifications
CPU
• Supports Intel® P4 Northwood/Prescott/P4 Extreme Edition processors.(PCB v1.1 only)
• FSB 400(Northwood only)/533/800MHz
• Supports up 3.2GHz and higher speed
Memory Speed/CPU FSB Support Matrix
Memory Speed/CPU FSB Support Matrix

FSB\Memory clock DDR266 DDR333 DDR400 800 MHz YES YES* YES 533 MHz YES YES NO 400 MHz YES NO NO
• Intel® 865G Chipset
- Supports 800/533/400MHz Intel NetBurst micro-architecture bus.
- Integrated graphic controller.
- Supports PC2100/PC2700 /PC3200 memory.
- Supports AGP 8X/4X at 0.8V (AGP 3.0) or 4X at 1.5V (not support 3.3V) interface.
• Intel® ICH5 Chipset
- AC'97 2.3 interface
- 8 USB 2.0/1.1 ports
- 2 channel Ultra ATA/100 Bus Master IDE controller
- SMBus 2.0 support
- 2 serial ATA Host Controllers
- Integrated LAN controller
• Support 100(Northwood only)/133/200MHz
• Support 400(Northwood only)/533/800MHz Intel NetBurst micro-architecture bus.
• Supports two 64-bit wide DDR data channels.
• Available bandwidth up to 3.2GB/s(DDR 400) for single-channel
mode and 6.4GB/s(DDR 400) for dual-channel mode.
• Supports four unbuffered DIMM of 2.5 Volt DDR SDRAM.
• Supports up to 4GB memory size without ECC.
• One AGP slot supports 8x/4x at 0.8V (AGP 3.0) or 4x at 1.5V (3.3V is not supported).
• Three PCI 2.2 32-bit Master PCI Bus slots.
- Supports 3.3v/5v PCI bus Interface.
• One CNR slot
• Dual Ultra DMA 66/100 IDE controllers integrated in ICH5
- Supports PIO, Bus Master operation modes.
- Can connect up to four Ultra ATA drives.
• Serial ATA/150 controller integrated in ICH5
- Up to 150MB/sec transfer speeds.
- Can connect up to two Serial ATA drives.
• AC'97 link controller integrated in ICH5
• 6 channels software audio codec C-Media 9739A
- Compliance with AC97 v2.2 Spec.
- Meet PC2001 audio performance requirement.
- Can support SPDIF Out via 3-pin SPDIF bracket only.
• Intel 82562EZ
- Integrated 10/100 Ethernet MAC and PHY in one chip
- Supports 10Mb/s and 100Mb/s auto-negotiation operation
- Compliant with PCI v2.2, and LAN on Motherboard (LOM) standard

Reset your motherboard BIOS. Open your computer casing where the motherboard lies in and then find the bios setting jumper, it should be located near the battery. To reset your bios, refer to the motherboard manual. :-)

Hi,

Does it POST and can you get into the BIOS? You need to set the FSB to 133MHz and the Ratio to 21x.

(I am assuming you did install the CPU correctly and installed the fan.)

If you can't get into the BIOS, you may need to reset it using JP14 on the motherboard.

Turn OFF power. Remove the AC power cord. Hold the power button in for 5 to 10 seconds. (This is done to discharge any capacitors.) JP14 normally is on Pins 1 and 2. Place the jumper on Pins 2 and 3 for approx. 10 seconds. Then place it back on pins 1 and 2. Connect the power cord and turn it on. This will set all the BIOS settiings to default and you should be able to set the FSB and Ratio.

Do you have a manual for the MB? you can get it from:

ftp://ftp.aopen.com/pub/manual/mb/ax4per/ax4per-ol-e.pdf

Thanks for using Fixya.

Wayne

Back to the jumpers again... Don't you know that those jumpers can cause your MB to fry? Your most touchy point is the temperature of the CPU chip. Do you have a way to see what it is when in the CMOS setup? If you do, OK! Maz temperature is about 55oC, even though they say 60oC. When you raise the voltage with the jumpers, you could create so much heat that your CPU chip will commit suicide. In your case there is protection against excessive heat. This probably is made for a much faster and more expensive computer. Once you have a way to monitor the temperature, carefully, you can try the higher frequency and WATCH the temp. You can increase the voltage to get up to two or three times the original frequency. This is called "overclocking". You will probably be requird to rebuilt the entire cooling tower, over the CPU socket, especially you will need a new and more powerful blower... One can get some extra life from an old computer, but now computers rae cheap when it comes to speed. Please let me know what are your decisions... That is how I am graded... Thank you for considering our help worthwhile!
My name is Constantin (arzconst)

Lorna,
to change bus to 133 MHz, you need to unlock the speed by setting a corresponding jumper on the board to assign busspeed by bios. After doing so, you need to clear CMOS and reboot. Next you'll have to set speed and multiplier in bios. Ideally: 900MHz = 100 x 9. Alternatively: 133 x 6.5 If that doesn't help...check if your RAM-modules are any good anymore. When RAM is not functioning, CPU-error code may be presented, since CPU cannot read/write to RAM, therefore not function. Let me know how this turns out.
Kind regards,
Stephan

Your motherboard supports 2 different fsb's.
look these up @ cpu-world
you can use:
Intel Pentium 4 processor (478-pin)
- 533MHz system data bus - supports up to 2.8 GHz
- 400MHz system data bus - supports up to 2.4 GHz

Intel Celeron processor
- 400MHz system data bus - supports up to 2.0 GHz CPU speed
and here are the suppoted cpus:
Intel Celeron RK80531RC029128 BX80531P170G128 1.7 GHz 17 x 400 MHz, Willamette Any A RK80531RC033128 BX80531P180G128 1.8 GHz 18 x 400 MHz, Willamette Any A RK80531RC037128 BX80531P190G128 1.9 GHz 19 x 400 MHz, Willamette Any A RK80532RC041128 BX80532RC2000B 2.0 GHz 20 x 400 MHz, Northwood A 1.525V not supported RK80532RC045128 BX80532RC2100B 2.1 GHz 21 x 400 MHz, Northwood A 1.525V not supported Intel Pentium 4 RK80532PC021512 1.5 GHz 15 x 400 MHz, Northwood Any A RK80532PC025512 BX80532PC1600D 1.6 GHz 16 x 400 MHz, Northwood Any A RK80532PC029512 1.7 GHz 17 x 400 MHz, Northwood Any A RK80532PC033512 BX80532PC1800D 1.8 GHz 18 x 400 MHz, Northwood Any A RK80532PC037512 1.9 GHz 19 x 400 MHz, Northwood Any A RK80532PC041512 BX80532PC2000D 2.0 GHz 20 x 400 MHz, Northwood A 1.525V not supported 2.1 GHz 21 x 400 MHz, Northwood A 1.525V not supported RK80532PC049512 BX80532PC2200D 2.2 GHz 22 x 400 MHz, Northwood A 1.525V not supported RK80532PE051512 BX80532PE2266D 2.26 GHz 19 x 533 MHz, Northwood A 1.525V not supported RK80532PE056512 BX80532PE2400D 2.4 GHz 18 x 533 MHz, Northwood A 1.525V not supported RK80532PC056512 BX80532PC2400D 2.4 GHz 24 x 400 MHz, Northwood A 1.525V not supported RK80532PC060512 BX80532PC2500D 2.5 GHz 25 x 400 MHz, Northwood A 1.525V not supported RK80532PE061512 BX80532PE2533D 2.53 GHz 19 x 533 MHz, Northwood A 1.525V not supported RK80532PC064512 BX80532PC2600D 2.6 GHz 26 x 400 MHz, Northwood A 1.525V not supported RK80532PE067512 BX80532PE2667D 2.66 GHz 20 x 533 MHz, Northwood A 1.525V not supported RK80532PE072512 BX80532PE2800D 2.8 GHz 21 x 533 MHz, Northwood A 1.525V not supported

Clear CMOS jumper Jumpers to enable system wake up on keyboard or USB devices PS/2 keyboard power jumper Fan power jumper Jumpers to enable/disable SMBus 2.0 support This is the jumpers which is avalable for the motherboard.
If there is no jumper for your oparation It will detected the changes Automatically.

jamie,

on the mobo there should be a little table next to a set of jumpers that tells u what jumpers to set for the multipliers. These days this is done in the bios but if your board is old (P3 which it is) there should be some white set of jumpers about 3 in a row near the cpu with a little table printed next to it. You should set it up so the multipliers adds up to 933...my guess is you should double what you have now to get it to 900 which is closest u are going to get

good luck

smeags