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Intel Pentium 4 2.2 GHz and AthlonXP 2000+ in the test: The battle of the titans

Intel Pentium 4 2.2 GHz and AthlonXP 2000+ in the test: The battle of the titans

Prerequisites

We already have in our large AMD which requirements the Athlon XP places on a mainboard Processor comparison clarified. The Athlon XP 2000+ with an effective clock rate of 1.66 GHz is no different. We would like to lose a few more words about the Pentium 4 at this point. The most important thing here is that Intel has the new Pentium 4 with a Northwood core with along-term planning has introduced into the market. When the starting shot of the first Pentium 4 with 1.4 GHz for Socket 423 and the Willamette core was fired, it was clear to Intel itself and thus also to the mainboard manufacturers that this Socket 423 was only an intermediate step to the current Socket 478 . Intel is extremely generous with roadmaps, so that the manufacturers of motherboards know at least six months in advance which products they can expect within a certain period of time. For this reason, almost every Socket 478 motherboard is equipped for the old Willamette and the new Northwood Pentium 4, at least as far as the required voltage of 1.5 volts is concerned. All that is missing for proper detection is a BIOS update and nothing should stand in the way of happiness. This is favored by the fact that the differences in architecture between Willematte and Northwood are extremely small.

Ein Another point to be observed in principle with Pentium 4 processors and which was mentioned briefly at the beginning would be the power supply unit to be used. The Pentium 4 also made new demands on the voltage supply and the voltage regulators on the boards could only meet these to a limited extent, so that Intel provides for the supply of the switching regulators with 12 volts directly from the power supply, instead of using the 5 and 3 as before. To supply 3-volt lines. Intel also provided the new ATX12V specification here, which provides a four-pin connector that connects the voltage regulator directly to the power supply unit and thus always supplies it with at least 10 A and a maximum of 12 A. Accordingly, the power supply manufacturers were once again asked to adapt their power supplies to these new specifications if they want to sell their power supplies to Pentium 4 customers. In addition, Pentium 4 power supplies should have the power factor correction in order to achieve ato ensure uniform voltage and power supply. With the new Pentium 4 with Northwood core, this solution is actually superfluous, as the processors with this core no longer develop quite as much heat output. That is why there are now Pentium 4 mainboards that do without a 12 volt plug and operate the Pentium 4 solely with the normal ATX (2x10). However, Intel still specifies it in its specifications. In the case of mainboards with this connector, it must also be connected to the power supply, unless otherwise stated in the manual, as otherwise the board can be damaged.

Last but not least, Intel has special requirements to the case itself. The processor giant recommends an average case temperature below 40 ° C in order to guarantee quiet and safe work. However, this recommendation only applies to the In-a-Box version of the Pentium4, which is delivered together with a fan and heat sink. However, this is more a recommendation than an obligation to be complied with. The fact is that the processor does its job properly even in warmer environments. As already mentioned, the additional holes for the Rentention module are unnecessary for the base 478. The layout of the Rentention module now used is shown in the next two images.

Socket 478 with Rentention module
Pentium 4 cooler

Overclocking

While AMD processors are the friend of overclocking , Intel has been making it much more difficult for these fellows for ages. Because something like the L1 bridges to unlock theThe Pentium 4 does not recognize multipliers in the Athlon, Athlon XP or Duron. Rather, the multiplier is permanently branded in at Intel during manufacture. This means that you can elicit more power from the Pentium 4 simply by increasing the front-side bus. However, this does not make much sense, as it automatically increases the PCI and APG clock and thus runs outside the specifications. Every additional megahertz at the FSB is reflected in an increasingly unstable system. This is tragic because the 0.13 µm Pentium 4 has great overclocking potential. The combination of head spreader and the Northwoord core, which radiates significantly less heat than its predecessor, the Willamette, has proven to be spot on. Due to the architecture, 2.5 GHz would be possible without major problems, but you would have to increase the FSB clock to 114 MHz. In this case, the AGP would run at 75.27 MHz (66 MHz standard) and the PCI at 37.62 MHz (33 MHz standard). A more than shaky affair. All in all, Intel remains true to itself with the Pentium 4 as well. The processors have a lot of potential, but it is not easy to use. True to the motto, stability first, the only thing left to do is to buy a new processor if the performance is no longer sufficient.

In addition to manipulating the front-side bus, it is also possible to change the core voltage of the Processor to increase the signal strength with a clock outside the intended sizes and thus also to provide a little more stability. The voltage signal from the processor, which transmits to the mainboard chipset which voltage must be used for the processor, is coded as follows.

Intel Pentium 4 VCore Pins
VID4 VID3 VID2 VID1 VID0 Pre 1 1 1 1 0 1,100 1 1 1 0 1 1,125 1 1 1 00 1,150 1 1 0 1 1 1,175 1 1 0 1 0 1,200 1 1 0 0 1 1,225 1 1 0 0 0 1,250 1 0 1 1 1 1,275 1 0 1 1 0 1,300 1 0 1 0 1 1,325 1 0 1 0 0 1,350 1 0 0 1 1 1,375 1 0 0 1 0 1,400 1 0 0 0 1 1,425 1 0 0 0 0 1,450 0 1 1 1 1 1,475 0 1 1 1 0 1,500 0 1 1 0 1 1,525 0 1 1 0 0 1,550 0 1 0 1 1 1,575 0 1 0 1 0 1,600 0 1 0 0 1 1,625 0 1 0 0 0 1,650 0 0 1 1 1 1,675 0 0 1 1 1 0 1,700 0 0 1 0 1 1,725 ​​0 0 1 0 0 1,750 0 0 0 11 1,775 0 0 0 1 0 1,800 0 0 0 0 1 1,825 0 0 0 0 0 1,850

As we can see, it is a 4-bit signal that has four pins the back of the Pentium 4 can be tapped as an output. This outgoing signal is actually binding for the mainboard, but most basic input/output systems (BIOSs) on the boards bypass the signal and make it possible to manipulate the processor voltage freely within the limits. But be careful, too much voltage can damage the processor. In addition, due to physical laws (Q = Cf²U), the processor gets warmer with increasing voltage. However, this is only for information.

On the next page: Known bugs

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