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OverClocking
Hardware Overclocking Discussions about overclocking (alt.comp.hardware.overclocking)
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OverClocking -
02-11-2005
, 01:16 PM
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I have a 1.8 P4 and was wondering how you go about over clocking it? Thanks Jesse |
and there is no known way of unlocking them.
Pete
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"pitts5" <xxdolphinzx (AT) aol-dot-com (DOT) no-spam.invalid> wrote in message news:420cf696$1_3 (AT) alt (DOT) athenanews.com... I have a 1.8 P4 and was wondering how you go about over clocking it? Thanks Jesse Pete |
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"pitts5" <xxdolphinzx (AT) aol-dot-com (DOT) no-spam.invalid> wrote in message news:420cf696$1_3 (AT) alt (DOT) athenanews.com... I have a 1.8 P4 and was wondering how you go about over clocking it? Thanks Jesse You can't overclock Pentium 4 Processors. Many have tried. Intel lock them and there is no known way of unlocking them. Pete |
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'C0²' wrote: | I have a C2D E6400 Cpu on a Gigabyte 945P-S3 Mobo | My Ram is | Module 1 DDR2, PC2-5300 (333 MHz), 512 MBytes, Corsair | Module 2 DDR2, PC2-5300 (333 MHz), 1024 MBytes, GeeSkill (I think) | V/C: Palit 7600GT | I am keen to OverClock, but I honestly don't know where to look, or | what to do. I tried using ATiTool to o/c my video card, but it kept | screwing up my system and actually SLOWING the performance of the | card. | Can anyone find a guide for me, or give me some tips? _____ This newsgroup is mainly concerned with overclocking CPUs and computer systems. I have no idea what ATiTool is, but display adapter overclocking is fairly easy; the newsgroup alt.comp.periphs.videocards.nvidia should be a good source for that. |
it fairly regularly to work with newer ATI cards.
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Assuming you want the best performance from your system, I will reply with CPU and system overclocking information. Your motherboard is dual channel DDR2 capable, so you should be using two matched modules of memory, or at least two the same size for best performance. Your motherboard is overclocking friendly, so it has the BIOS settings to overclock your CPU. You can only do this by increasing the FrontSide Bus frequency; the CPU multiplier can not be increased. Intel CPUs are manufactured with performance margins to guarantee proper performance at the specified temperature. You can use this margin to gain increased performance. Usually, you can boost the CPU speed by 10% or more simply by increasing the FSB speed. At a certain point, additional steps must be added. Lowering the operating temperature helps; the CPU is guaranteed to perform at, say, 69 C, so if the CPU temperature can be kept below, say, 55 C, you can increase the overclock further. The additional step, necessary at a certain point, is to increase the CPU core voltage by a small amount (less than a 10% increase is safest.) Your memory is not fast enough to run at the specified 1066 MHz FSB speed for the E6400 CPU, so it is already running at a 5:4 CPU:Memory ratio. Expect to change that ratio further as you raise the FSB speed. The above changes should give you a CPU speed of more than 3 GHz. The changes should be made in small increments, with a test for stability after each change. Keep a record of the changes you make. An Intel CPU will lock up, shut down, and cool off before any damage is done by overheating. An Intel CPU can be immediately destroyed by a core voltage that is too high (usually more than 15% above specification.) Overclocking an Intel CPU is easy, but requires patience and a methodical approach. Below is a guide to overclocking I posted to this newsgroup last year. It uses older Intel CPUs as an example, but the principles and methods of overclocking are the same. ***** ***** All Pentium CPUs can be overclocked; some do better than others. If the motherboard is 'overclocking friendly', an Intel CPU is very easy to overclock. If the motherboard is NOT 'overclocking friendly' the task is much more difficult. If your motherboard is 'overclocking friendly' the manual likely gives all the information necessary to overclock, though the manual may have been transplanted back and forth among several languages, and the information may be a bit confusing. #1. Raising the CPU voltage can destroy your CPU. NEVER raise the CPU voltage more than 15%, and if you do raise it, do it in very small steps. #2. Raising the CPU clock speed will NOT damage your Intel CPU, motherboard, memory, or anything else. If you raise the clock speed too much, the system will either to run in a stable manner, or will fail to boot. This is not a problem because either the BIOS will automatically reset to default values or there will be directions in the manual on how to reset to default speeds. #3. In overclocking, make any changes in small steps, checking for proper operation after each change. #4. Overclocking works best when the CPU temperature is kept as low as possible. #5. Intel CPUs can ONLY be overclocked by raising the clock speed. Even if the multiplier can be set in the BIOS, changing this settings has NO effect. #6. Some older motherboards may report an incorrect speed for CPUs that have a higher speed than available when the BIOS was installed. #7. Intel CPUs have a quad-pumped memory bus; that means data is transferred four times for each clock cycle; for a 533 MHz FrontSide Bus speed the clock speed is 133 MHz. That 133 MHz clock speed is multiplied by a factor FIXED and UNCHANGABLE inside the CPU to give the overall CPU clock speed. For your 2660 MHz CPU, the multiplier is X 20 (133 MHz X 20 = 2660 MHZ.) #8. The rated speed of the installed memory can limit the overclock. Memory can be overclocked, but it will eventually reach a limit. Faster memory can be installed, but the cost may not be worth it. The memory clock can be set to a lower ratio (with some motherboards) to allow higher clock speeds, but there is a performance penalty. How you overclock depends on the specifics of your system, how much patience you have, and much attention you pay to details. A general approach: * Download and install MotherBoard Monitor 5 (free) at http://mbm.livewiredev.com/ . This will allow you to monitor and record the CPU speeds, fan speeds, CPU temperature (and perhaps motherboard, memory, and other temperatures, and voltages.) * Download and install SiSoft Sandra (free) at http://www.sisoftware.net/ . This program is a collection of information gathering applets for your system. It also has low level tests of performance, as well as stress tests (necessary to establish proper operation when the CPU is operating at full capacity. I find version 2004 more useful than 2005, but 2004 is hard to find now. * Use MotherBoard Monitor 4 and SiSoft Sandra because the vast majority of the people who use this forum also use these applications * Read the manual carefully. * Clean the heatsink fins, and fans of all dust, grease, and dirt. * Write down the settings in the BIOS. * Write down the temperature and voltage information from SiSoft Sandra. * Check the voltages reported by MotherBoard Monitor 5 for you system. If any are outside the specifications this may affect the operation of your system, especially if it is overclocked. Also check the total rated output of your power supply, if it is marginal, overclocking (since more power is required) may also be marginal. * Steps for overclocking your Intel CPU (only after completing the above recommendations): #0. The standard setup for PCI bus and AGP bus speeds are fractions of the clock speed. Make sure the PCI/AGP Bus speeds are instead locked at 33 MHz/67 MHz; if the PCI bus speed is more than 36 MHz corruption of data on your hard drives can occur. #1. Increase the clock speed by 5%. #2. Reboot and check for operation. #3. If #2 is successful, repeat #1. #4. If #2 is not successful, raise the CPU core voltage by 0.05 volts (in NO case raise this voltage to more than a total of 15%, doing so may instantly destroy your CPU; when the core voltage reaches this limit go to #6.) #5. Go to #2. #6. You have reached the limit of overclocking without changing other factors which may include CPU cooling, System cooling, memory settings. Installing memory capable of higher clock speeds may help. On the other hand, some of these changes may be expensive, and not worth the money for the possible performance increase. * After reaching the highest speed, check operation under full CPU load (use SiSoft Sandra burn-in, other burn-in programs, or intense action 3D accelerated first-person shooter games.) If the system is not stable under heavy load, try reducing the clock speed and/or CPU core voltage (higher voltage means higher operating temperatures.) * Check the installation of the CPU heatsink; new heatsink compound may help CPU cooling. * A better than stock heatsink/fan may aid overclocking. * Improved system cooling may aid overclocking. * Exotic cooling of the CPU to room temperature or below can significantly increase top speeds (or not, depending on the individual CPU speed, memory quality, and motherboard.) WARNINGS!!! * Increasing the CPU voltage above 15% over specifications is likely to INSTANTLY destroy the CPU * There is always a chance that when you start fooling around inside the system case of your computer that you may cause damage (the butterfinger factor.) You can find a LOT of additional information on the Internet, including the speeds that others overclockers have reached with your model CPU. One question you must ask yourself is WHY you wish to overclock; I can think of three reasons: #1. Higher performance at little or no expense with your present system. #2. Just because you can, and enjoy experimenting #3. Bragging rights - the highest possible speeds (which is going to require a LOT more money. Don't let this long list intimidate you; just go along step by step. I am posting this on a system using aBit TH7-II (Intel 850 chipset) motherboard Pentium 4 2.6 GHz 400 MHz FSB Northwood CPU PC800 RDRAM 640 MBytes Stock CPU cooling 450 Watt Antec Power Supply I selected a clock speed in the BIOS of 128 MHz, giving a CPU speed of 128 MHz X 26 = 3328 MHz. The PC800 RDRAM will not operate reliably above 128 MHz (28% above specification), and changing the CPU:Memory ratio from 1:1 to 4:3 performance hit is not worth the small additional increase of CPU speed possible with this particular CPU. ***** ***** Pentium 4 'Northwood' CPUs are generally limited to less than 3.4 GHz without heroic cooling but the E6000 and E4000 series Intel CPUs are MUCH more overclockable. This newsgroup operates with a sort of 'peer review'; any problematic posts are usually caught and discussed; I find alt.comp.hardware.overclocking very reliable. Please post specific questions here; you are sure to get answers. Google is also a good method for getting overclocking information; you can ask here about information you find. Phil Weldon |
my highest overclock first at stock voltage, then raise the core voltage one
increment and go through it again making sure temps are good and have
stability. I keep going through that process until I see either the temps go
up too high or see some instability. Phil's guides have been used here for
quite a long time and are a very good and reliable resource.
Ed
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