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Discussion Starter #1
Hi everyone. Apologies for the rather long post, but I'm totally new to overclocking and the forum and I have a few rather basic questions that I hope someone might be able to explain. I've just spent the best part of a day reading as many OCing guides as I can to understand how to safely OC my system. I think my main problem is that the guides don't always correspond to my BIOS/CPU and that MSI's explanation of the BIOS settings is terrbile. Anyhow, here's my setup:<br />
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AMD 62 X2 4200+ AM2 2.2Ghz (mfr#: ADO4200CUBOX)<br />
MSI K9N SLI Platinum motherboard<br />
Crucial 2GB kit (1GBx2) RAM (CT2KIT12864AA53E DDR2 PC2-4200 • CL=4 • UNBUFFERED • NON-ECC • DDR2-533 • 1.8V • 128Meg x 64)<br />
XFX GEForce 7600GT video card<br />
Soundblaster Audigy 2 sound card<br />
Thermaltake 420W PSU<br />
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I started with fail safe BIOS defaults, execpt I disabled Cool 'n' Quiet and all Spectrum Spread.<br />
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Correct me if I'm wrong, but as I understand it in principle I should first find the motherboard's max FSB, then find the memory's max FSB and then use the two to find the max clock speed (i.e. FSB x multiplier) without going over the memory's or the motherboard's max FSB. With my CPU I understand that there is no FSB as the Northbridge is integrated into the CPU, but that you have HTT instead (i.e. HTT x multiplier = clock speed). Here are my questions which are probably pretty basic, but I can't seem to figure out the answers:<br />
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1) What I first tried to do is find the max FSB for the mobo. In order to protect the memory, which has a max speed of 266Mhz, I wanted to reduce the memory multiplier so when I increase the FSB the memory doesn't run faster than 266Mhz. When I went into the BIOS (which looks like this: <a href="http://www.msi.com.tw/html/service/techexpress/mainboard/7250/page1.htm" target="_blank">http://www.msi.com.tw/html/service/t...7250/page1.htm</a>) I can change the Memclock Mode from Auto to Manual and then get some options to change the memory multiplier. However, the lowest setting I can get is 400 which gives me a 1:1 FSB:Memory ratio, so I can't seem to "underclock" the memory to protect it while finding out the max mobo FSB. Is this correct, or is there another way of reducing the memory multiplier? Presumably if my mobo and CPU can handle an FSB of more than 266Mhz then that's the FSB I'm limited to since I can't slow the memory down so it runs slower than the FSB <img src="/images/smilies/frown.gif" border="0" alt="" title="Frown" class="inlineimg" /> <br />
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2. My memory is just standard DDR2 PC2-4200 memory, and as a result I don't think I should overclock it i.e. I should try to make it run no faster than 266Mhz. Is this right, or can this type of memory take a faster FSB and voltage than 266Mhz and 1.8v?<br />
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3. PCI bus speed. I used Clockgen to show the current PCI and PCIE bus speeds, which appear to stay constant when I raise the FSB. I presume this is because the PCI and PCIE speed is locked (so I can increase the FSB without any fear of SATA hard drive data loss etc). Can someone confirm this?<br />
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4. The multiplier on my CPU runs from 5x to 11x and I can adjust it in the BIOS by changing the "Processor Frequency Multiplier" in the "CPU Frequency Configuration" menu. But what is the "Hyper Transport MCP55 Configuration" menu for? If you unlock it you can adjust "MCP55 (SB) to AM2(CPU) Frequency", but I've changed that a few times and still appear to get the same readings in CPU-Z. I guess it's another multiplier, but what does it do?<br />
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I'm fascinated by all this. I've always "overclocked" my cars, bikes and anything else with an engine, but never really knew you could tune your PC like this.<br />
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Any suggestions greatly appreciated.<br />
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Cheers<br />
Simon
 
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Discussion Starter #2
Re #4 above, I think this is the HTT multiplier. I have read that I change this multiplier to reduce the HTT frequency to prevent it from going over 1,000Mhz when I increase the FSB speed. Is this right, and I should try to keep it under 1Ghz to prevent damage (like the PCIE and PCI lock)?<br />
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Cheers<br />
Simon
 

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Greetings AnimalHungary,<br />
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I don't have much too add as you seem to have a good grasp already. It's just nice to see someone that come to the table prepared for business....<br />
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Oc'ing is not a cookie-cutter process. All hardware performs differently w/ different properties. You have already mentioned max settings for CPU and RAM....good. You should also be aware of the nominal operating temps of your CPU and the safe voltages that can be applied to both the CPU and the DIMMS.<br />
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You already know what to do, so you will simply have to experiment. When you hit a wall and you know that the threshold has not been met, post the specifics, there are others on this forum that know a great deal - maybe they will see this post and have some good additions for you.<br />
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Good luck!
 

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HI and WELCOME <img src="/images/smilies/biggrin.gif" border="0" alt="" title="Big Grin" class="inlineimg" /><br />
Yes...<br />
4x up to 260 beyond that 3x to about 345MHz. Most MBs can do 1080 where about the wall is, although a few do go past that but there is no value in it. <br />
Please fill in your "System Specs" via the USER CP link @ top of page <img src="/images/smilies/smile.gif" border="0" alt="" title="Smile" class="inlineimg" />
 

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Discussion Starter #5
Thanks guys. Am I correct in thinking that:<br />
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1) My BIOS prevents me from underclocking my memory (see 1.) in my previous post.<br />
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2) I should not even try to OC my Crucial memory because it's not designed for OCing?<br />
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3) My PCI and PCIE bus speeds are locked?<br />
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And a final qu: how do I find out the safe voltages that can be applied to the CPU and DIMMS?<br />
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Thanks<br />
AH<br />
<br />
P.S. I've filled out my sys specs - Man, that's a long list to fill in!!
 

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A small voltage bump should be safe and give up a little more speed. Perhaps some timing tweaks can get a little more out of it too.<br />
Idealy a good DDR2 800 would behoove you.
 
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