DVA3901
Captain, MD-88
Joined on January 10 2007
Northeastern United States
15 legs, 24.9 hours
3 legs,
3.0 hours ACARS
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Posted onPost created on
January 22 2007 16:11 ET by Garry Shtofmakher
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Disclaimer- I will not be held responsible for any damage done to your system. Overclocking should be done at your own system's risk.
This guide has been created by myself without the use of anyone else's material. This guide is for use on fs2004.com only
Okay lets start.
What is overclocking?
Overclocking of the CPU involves tweaking the FSB speed, multi, Vcore etc to acheive a faster core speed yet maintaining stability.
In short, it is increasing the CPU's clock speed beyond the original speed rated by the manufacturer. It is free performance in it?s purest form smile.gif
what do I need to overclock?
For a successful overclock you need a motherboard with a range of options in the BIOS for overclocking and a reasonable cooling solution for your cpu. It is also recommended that you have a reasonably powered PSU (400W+ PSU) with stable volt rails. You can find this out by opening the side of your case and looking at the sticker on the side. I'd consider these as a reasonable set of volt rails.
+3.3V 25A
+5V 35A
+12V 18A
Of course for you Small Form Factor users don't worry about the high powered PSU issue as the PSU's in your systems are very efficient. smile.gif
Finally, above all you need a bit of common sense.
Jargon for P4/Core 2 Duo/Celeron/Athlon XP/Sempron (socket A) overclocking
Core Speed- Your Processor?s clock speed
FSB (Front Side Bus)- Also known as Internal Clock Frequency or CPU Bus Frequency in BIOS.
e.g.- 100,133,166,200, 266
Multiplyer- This multiplies your FSB to get your cpu?s clock speed.
e.g.- 200 fsb * 15 multi = 3000mhz
Vcore- The core voltage going to your CPU.
Memory Divider- This is a ratio which determines the speed of your ram in comparison to your CPU?s FSB.
e.g.- 166 divider on a CPU with 200mhz FSB. (200/6)*5 = 166mhz.
This is useful when your ram can?t cope with high speeds but on P4/Celeron/Athlon XP?s running memory dividers causes a slight performance hit.
Memory Timings- These involve the latency of your memory. Tightening your imings decreases latency but doesn?t allow you to hit higher speeds with your memory. General rule of thumb is that for higher memory speeds you need to loosen the timings. For more info on memory timings see Warren?s memory guide.
PCI/AGP or PCI/PCI-E Frequency Locks- Most motherboards are equipped with this feature (bar dell, HP motherboards and budget motherboards). Basically when you increase the FSB speed the PCI and AGP (PCI-E if you have it) frequencies increase in turn with it. Default frequencies are
PCI- 33mhz
AGP- 66mhz
PCI-E- 100mhz
When these values increase it can cause instability or damage to the expansion cards using those slots. Most motherboards are equipped with this and are locked by standard.
Also if these aren?t locked it can cause instability on SATA Hard Disk Drives and cause data corruption. Its true. It happened to me when I overclocked my dell. mellow.gif
Jargon for Athlon 64 and Sempron (S754) Overclocking
For AMD Athlon 64 users the above applies to you as well except for FSB. Also there a few more things to know.
HTT- Instead of FSB there is HTT. Just think of it as FSB or it may confuse you.
HTT Multi- may also be labeled as LDT Multi in BIOS.
On socket 754 systems this is set to 4 by default and on socket 939 systems it is set to 5 by default. This multiplies the HTT.
E.g.- 200*5=1000mhz
This is not the multi which gives you your core speed. It is related to the A64 Hyper Transport. You lower this when overclocking to keep the speed below 1000mhz (800mhz for socket 754).
E.g.- if you increase HTT to 210, HT speed is 1050mhz. Chances are that this will cause instability. Dropping LDT multi to 4 allows you to increase HTT further.
Garry ShtofmakherCaptain, MD-88
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DVA2253
Senior Captain, DC-8-61
COMM
Joined on April 01 2005
Everett 250 Club
Online Century Club
Eight Century Club
DVA Ten-Year Anniversary
"I'd rather be flying!" Church Hill, TN USA
862 legs, 1,344.5 hours
108 legs,
165.2 hours online 299 legs,
485.1 hours ACARS
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Posted onPost created on
January 22 2007 16:24 ET by George Lewis
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DVA2348
First Officer, MD-11
Joined on May 18 2005
Century Club
Overland Park, KS USA
132 legs, 397.4 hours
11 legs,
18.5 hours online 94 legs,
270.9 hours ACARS 3 legs,
5.0 hours event
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Posted onPost created on
January 22 2007 16:42 ET by Mike Roth
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I'm sure Mul would appreciate it if you didn't use his guide. One, because you didn't give him any credit, and two, because he made that, as it states, specifically for fs2004.com.
I realize you mean well, but Mul put a lot of time into his guides, and you just come over here and post it without even giving him any credit.
For anyone wanting to read the thread, here is the link.
http://www.fs2004.com/forums/index.php?showtopic=56097
Mike RothFirst Officer, MD-11
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DVA3901
Captain, MD-88
Joined on January 10 2007
Northeastern United States
15 legs, 24.9 hours
3 legs,
3.0 hours ACARS
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Posted onPost created on
January 23 2007 15:55 ET by Garry Shtofmakher
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