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Thread: Overclocking of AMD Phenom X4 9850

  1. #1
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    Jul 2010
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    Overclocking of AMD Phenom X4 9850

    I have overclocked some processor with my friend but this time I am thinking of overclocking myself. I am having the basic knowledge about an overclocking but now I am here to get some notes about an overclocking of AMD Phenom X4. Also please provide some notes about the undervolting for the same processor. I am also interested in knowing about the power consumption and temperature of the same processor. I know there are various queries in one question, but since they all are related I thought to post all these in one post rather than asking in numerous post. Hope that is allowed in this forum. Please help me as early as possible.

  2. #2
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    Oct 2008
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    Re: Overclocking of AMD Phenom X4 9850

    As always, make several buyers of a new processor, the question of whether a good deal of untapped potential power and thus seems wasted. Therefore, we test how these reserves can be found: it is overclocked. Ideally suited is in the Phenom Black Edition, in which the multiplier can be chosen freely. However, as we have already struggling with work time with a very high power consumption and relatively high temperatures, we restrict ourselves to some "tentative experiments with air cooling. The 3.1 GHz did not want to go to work very stable, but we attributed to the lack of air cooling and high temperatures. The safe side, our test system has not only turned off once complete, to protect the processor against overheating. To operate beyond the 3 GHz almost mandatory water-cooling is necessary. To what extent, however, the additional power that can be achieved by overclocking the processor, in relation to the further increase in power consumption and the burden of cooling is, the customer is inclined to decide for yourself.

  3. #3
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    Re: Overclocking of AMD Phenom X4 9850

    I would like to tell about the Undervolting. To limit the power consumption, many readers use more of the so-called "Undervoltens": Here, the voltage of the processor - based on the work stress - to the point lowered, at which the system is running with the least amount of energy still stable. In addition to the reduced power consumption, this has also consistently lower temperatures result. The Phenom X4 9850 is certainly not in this category flagship processor, since you a Black Edition CPU with free multiplier probably not buy, to shut them or to undervolt. Our managed processor but a stable operation under full load in Prime-test to 1.15 volts - all of which will be punished at 2.5 GHz with errors, and aborts the test.The drop in temperature, is very clear and 20 degrees show less compared to the conventionally-powered model with a saving of 0.15 volts, and in the power consumption. In the endurance test of Prime we reached only about 300 watts maximum, which means a saving of more than 80 watts compared to the reference system! On Windows, Full Load, where we also can find Prime 3DMark06 running in a loop, the difference is still far from larger.

  4. #4
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    Re: Overclocking of AMD Phenom X4 9850

    As usual, we want to emphasize at this point that the TDP -stated by the manufacturer with in everyday life has power to do nothing. Based on the TDP can ensure an OEM is that he is building a system that can dissipate the maximum thermal output of the processor to the cooling system. As usual, we measure in our system, the power consumption of the entire PC. We will measure the "Voltcraft Energy Check 3000" in the BIOS, the power consumption, with any application (no load) in Windows and under full load. To the computer under full load really utilize fully, we need a program that both appeals to all cores, and the graphics card calls completely. In our case, the quad-core processor is claimed to four instances of Prime 95, while in parallel, the two graphics tests "Firefly Forest" & "Canyon Flight" from 3DMark06 in a loop. All power saving features that dominated a processor (Cool'n'Quiet, Enhanced Intel SpeedStep Technology (EIST)) are activated.

  5. #5
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    Re: Overclocking of AMD Phenom X4 9850

    To check you will have the test on Windows Vista once again performed without loading the graphics card with Prime 95. But after the start of this tool has only started and operated with the power meter after a few minutes, the recording function. The new Phenom X4 9850 by storm with its rise to 1.3 volt input voltage once the peak of the field. It suggests in any discipline in which it arrives at the full performance, the Intel Core 2 Extreme QX6850, which was until now unbeaten as power-hungry processor at the top of each test field. A lone rash leads us the AMD Phenom X4 9850 BE on his first reference clock of 2.5 GHz over 560 watts in mind - not a very glorious record. The increase to 125 watts TDP is a good 30 percent higher than a Phenom 9600, one can identify TDP of 95 watts. If you take this 30 percent as a basis for measuring values, then moves to the new Phenom 9850 processor well within its specification. Those details are, however, purely theoretical, since there is no precise information on the part of a producer on the consumption of a processor. All these data are processed to trade on the TDP. The fact that the very high power consumption reflected on the temperatures, is only logical. Even there, the faster Phenom is the first time, the Core 2 Extreme Intel's dangerous, as the chart shows, on the next page. Before we look at the temperatures, however, we still want the claim that the new B3 stepping would generally eat more power, get to the bottom. For this reason, we have clocked our Phenom 9600 Black Edition (B2) to the level of the Phenom 9850 (B3) (voltage of the processor (1.3 V), chipset (1.3 and 1.25 V) and all speeds of the North Bridge , the HT-Links (2,000 MHz) were taken into account). The performance of the thus set Phenom 9600 BE is identical to the original Phenom X4 9850th For comparison, we also take a Phenom X4 9850 with 1.25 and 1.2 volts in the table.

  6. #6
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    Re: Overclocking of AMD Phenom X4 9850

    The fact that AMD has changed something on the processor needs is beyond question, how this happened exactly, and those minor drawbacks are taken into account for this, AMD will not be betrayed. The nearly 30 watts difference (with a total power of more than 300 watts) to a clocked an identical 1.3 volts Phenom 9600 BE in our test shows with Prime, that the power requirement of the new stepping, although not increased significantly, between B2 and B3 stepping, but there is definitely a difference off the power - at least in our species. Claims that the B3 Phenom should be more energy efficient than previous models B2, we can therefore not support. AMD wanted to generalize our findings to a lively e-mail traffic (including engineers), however, not one. The official line is still that between the B2 and the new B3 stepping are no changes that affect the power directly from the increase in tension beyond. Messages from processors with high and with supposedly extremely low power consumption and our results in the comparison were a B2-B3 with a CPU simply due to the different "raw processors," said AMD.

  7. #7
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    Re: Overclocking of AMD Phenom X4 9850

    The manufacturer is different for the classification of the CPUs directly from the production of "cold" and "hot" processors. In the so-called "binning" tests by the manufacturers include that with which CPU clock frequency, voltage and therefore with which power is run. For each CPU model, there is a range here, in one processor may move. For the AMD Phenom X4 9850, for example, the voltage from 1.20 to 1.30 volts, the TDP can be up to 125 watts. Depending on how the "binning" runs, can be directly out of production a Phenom X4 9550, because it runs at 1.20 volts, or a Phenom X4 9850 from a processor that requires 1.3 volts and therefore a higher class is promoted. If the order complete, the processors are marked appropriately so that they can communicate the required voltage and frequency for operation directly to the BIOS.

  8. #8
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    Re: Overclocking of AMD Phenom X4 9850

    Depending on how the "binning" runs, can be directly out of production a Phenom X4 9550, because it runs at 1.20 volts, or a Phenom X4 9850 from a processor that requires 1.3 volts and therefore a higher class is promoted. If the order complete, the processors are marked appropriately so that they can communicate the required voltage and frequency for operation directly to the BIOS.
    These differences now it could happen that a Phenom X4 9850 comes with 2.5 GHz by the production, running at 1.2 volts and meets so even the 95 watt TDP. Such a processor would be for each and every overclockers a little treasure, but it appears that such models are rare. Here comes the commercial decision by AMD into the game, because currently available for AMD Phenom X4 9550 / 9650 needed more urgently than the 9850er. So, instead of the very good processor (in the eyes of overclockers) for sale as the fastest model, it is marked in most cases, to a Phenom 9605/9550. This is exactly what the different results of previous tests of the new Phenom X4 9850 declared the world. While some Phenom X4 to almost 3.5 GHz overclock was her , others failed already at 2.8 GHz. This also explains the model of "tempered" processors: The tests with the highly overclockable variants are likely a "cold" processor have caught, while we (like many other sites) could have gotten more of a "hot" model. AMD announced at this point that the high-end CPUs of the 9850er series probably belong to the "hot" variety. Our comparison of a Phenom 9600 with a new Phenom X4 9850 may therefore reflect in terms of power consumption and temperature only limited conclusions. AMD has attested to us that we may have caught one of the hottest models - which ultimately also shows that the processor itself performed with the boxed fan with full details of exhausting its service.

  9. #9
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    Re: Overclocking of AMD Phenom X4 9850

    Our results show once again how sophisticated you test this kind on the Internet as well as the written sheet must be considered. Quick results that you, perhaps even with a pre-production model, which thus reaches never in the trade, has determined to be taken at face value and sold as the only valid fact for the production-ready product. That there may be so quick to misinformation or even prejudices, can not be dismissed out of hand. For temperature measurement, the system was closed for an hour heated by 3DMark06 loop and then the temperature values at the known combination of Prime95 and 3DMark06 determined. The room temperature was around 21 degrees, the temperature read from the motherboard at full load with a maximum of 46 degrees to 90 degrees Celsius until 9850, our Phenom X4 after a few minutes in the simple life test of Prime.

  10. #10
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    Re: Overclocking of AMD Phenom X4 9850

    Although we have performed our measurements with both AMD OverDrive and with the HWMonitor and Everest, but all yielded the same results, and patently false. Therefore, we have measured with an infrared thermometer "by hand". The resulting temperatures were on average around ten degrees below those of the internal sensors, which we have based on the Athlon 64 X2 6000 + and the Athlon 9600 + reviewed. After completion of the measurements, we conclude that the Phenom X4 9850 has reached a maximum of 70 to 75 degrees - compared to 90 degrees in software displayed a positive sign. We seem to have been affected by the problem that is actually 319 to be. to a planned fix for this problem, because customers can rely on the displayed values. The measurements of a Phenom 9600, which works with the same voltage and the same frequency as a Phenom X4 9850, point to a temperature difference of a few degrees. Our original table distorted the picture a little, because there was measured at 1.2 volts. As you can see the new chart now, the difference at the same voltage shrunk to a few degrees and moves according to AMD, thus also within the specifications. The remaining temperature difference AMD explained logically here with "cold" and "hot" processors.

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