Jumper Setting for Keyboard Power-up
The keyboard power-up feature allows you to power up the PC by pressing the Spacebar on the keyboard. In order to use this feature, your power supply must support it. If the documentation for the computer case and power supply does not tell you if the feature is sported, disable it.
If it is enabled and the feature is not supported by your power supply, the system will not come on.
The two different configurations for these jumpers, where dark shading over two pins indicate that they are closed.
The darkened pins will always be in pairs because a jumper cap closes two pins by connecting the pair. Also, sometimes in the documentation, pin 1 is marked as a square and other pins as circles. On the system board, a very small 1 is sometimes imprinted next to pin 1 in a group of pins, or the name of the group is imprinted next to the entire group of three or four pins. Set the jumper to disable the keyboard power-up feature:
- Locate the jumper group on the system board
- Place the jumper cap to disable the feature, as indicated in the documentation (in this case across pins 1 and 2).
Jumper Setting for CPU Bus Frequency and CPU Multiplier
Before we continue with setting jumpers, a quick review of terms and relationships is in order. System-board documentation does not always use the most common terminology, which can lead to confusion. Also, terms used on one page or diagram might not be the same as the terms used on the antler page or diagram. Now, let’s turn to our review. Recall that the CPU speed is the internal speed of the processor and is really a “frequency” rather than a “speed”, because it is rated as MHz (million cycles per second). Also recall that the CPU communicates with RAM over the memory bus, which is sometimes called the CPU bus, the clock bus, the system-board bus, the host bus, the system bus, and so on.
The two most popular ratings for this memory bus are 66MHz and 100MHz. Also, recall that the memory bus runs in sync with the CPU, and the CPU speed is determined by multiplying a factor times the memory bus speed, called the multiplier. This system-board documentation expresses that multiplier as a ratio, which, of course, it really is. The documentation expresses this ratio using the colon, like this, “CPU core: bus frequency”. In our example, 350:100 yields the multiple of 3.5 for a 350MHz CPU and 100MHz memory bus speed. And finally, recall that the PCI bus also runs in sync with the CPU, but at half or a third the rating of the memory bus.
how to check CPU speed after overclocking in 2021
The system board can run at recommended speeds of either 100MHz or 66MHz and support multipliers of 3.5, 4.0, 4.5, and 5.0. The jumpers can also be set to that the bus runs as high as 133 MHz, although the system-board documentation says that this speed is not supported by the Intel chipset on the board and is not guaranteed to be stable. The board accommodates Pentium II or Pentium II Celeron CPUs rated from 266MHz to 450MHz. In order to use the faster bus speed of 100MHz, the CPU must be a rate of at least 350MHz.
Based on the advertised speed of your CPU
The jumpers on this board must be set to determine the memory bus speed and the multiplier. Begin with the rating of the CPU, which in our case is 350MHz. To set the jumpers for the CPU multiplier (See the jumper part of the diagram), we selected the fourth group of the first row of possible selections because it is labeled with 3.5, which is the multiplier we need. For the bus frequency, select the fourth group in the one row of possible selections, because it is labeled with the appropriate speed. You have selected the multiplier to be 3.5, bus speed to be 100MHz, and PCI bus speed to be 33.3MHz. The PCI bus will be running at one-third the speed of the memory bus. To complete this step of setting CPU bus frequency and CPU multiplier (your system board may have an entirely different grouping of jumpers to specify memory bus speed and multiplier)
- Locate the jumpers on the system board
- Set them just as they are in our selections
how to check CPU speed after overclocking in 2021
Jumper group that controls CPU Core
Step 2: Install the CPU and CPU Fan
This system board has a Slot 1 for the Pentium II, which comes packages either in a single edge contact cartridge (SECC) or a single edge processor package (SEPP) for the Celeron processor. For either processor, the system board uses a universal retention
mechanism(URM), which is preinstalled on the board. Follow these steps to install the fan on the side of the processor first, and then install the processor on the system board.
- Unfold the URM arms. Flip both arms up until they look into position
diagram- Preparing URM Arms
- Examine the fan and processor to see how the fan braces line up with holes in the side of the SECC. Place the fan directly on the side of the SECC. The two should fit tightly together with absolutely no space between them.
diagram – the braces on the fan align
- After the fan and SECC are fitted together, place the SECC on a table and push the clamp on the fan down into place, to secure the fan to the SECC.
diagram – push clamp on the fan down
- Insert the fan and SECC into the sporting arms. The SECC should fit snugly into Slot 1, similarly to the way an expansion card settles down into an expansion slot. The arms should snap into position when the SECC is fully seated. Be certain you have a good fit here.
diagram – insert the fan and secc into the supporting arms
- Lock the SECC into position by pulling the SECC locks outward until they lock into the supporting arm lock holes.
diagram – push secc locks outward
- Connect the power cord coming from the fan to the power connection on the system board. Look for the power connection near Slot 1. If you have trouble locating it, see the system-board documentation.
One thought on “Jumper Setting for Keyboard Power-up”
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