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Overclocking a DX38BT

post #1 of 13
Thread Starter 
Hello;

I am trying to over-clock my system. It is my first attempt to over-clock and I have not been very successful. The items I am working with are:
  • Intel Core2 Quad Q6700
  • Intel DX38BT X38 Socket 775 Motherboard
  • BIOS Update 1554 [BTX3810J.86A]
  • ARCTIC COOLING Freezer 7 Pro
  • Corsair XMS3 2048MB PC10600 DDR3 8-8-8-20
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I purchased the components with the idea of over-clocking the system to at least 3.2Ghz or if I could I would love to get to 3.4Ghz. But if I could get to a stable 3.2GHZ I would be cool.

I have been able to over-clock the system to 3.0Ghz; but I cannot get it over 3.0Ghz. I over-clocked by increasing the FSB to 300 with a Multiplier of 10X through the BIOS. That is all. I did not change the memory or voltage. I was able to run Prime95 for 12hrs and it stayed stable. If I increase the FSB to even 301 it will not post and I have to reset the BIOS.

I know there are no pre-sets and that every “over-clock†is different. I think the issue is that I just do not understand enough about the mechanics of over-clocking to do it correctly.
    1. I have read that you should have your memory at 2X your FSB; however all the articles talk about using DDR2 memory where as I have DDR3 memory. Do I still increase the DRAM of the memory to 2X or do I need to do something different with DDR3?
    2. Since the Q6700 has a multiplier of 10X I am assuming that I would need to set my FSB to 320 in order to get to 3.2Ghz or 340 in order to get to 3.4Ghz. What would I set my memory to in order to get the 1:1 ratio?
    3. The Intel DX38BT board seems to be very restrictive. It has a “Performance†tap in the BIOS that seem to be the place to do the over-clocking. While I can increment my FSB by 1’s, the board seem to have a preset value for the DRAM. The DRAM setting is limited to two areas

      a.Reference frequency = 400Mhz, 333Mhz, 266Mhz, 200Mhz
      b.Memory frequency = 1600Mhz, 1333Mhz, 1066Mhz, 800Mhz

    4. If I leave the settings at default, the board sets the Memory frequency at 1066Mhz. What should the Memory frequency be set to?
    5. My CPU voltage is currently 1.325V which is default. I do not know if I need to manually increase this or if I should let the board handle this automatically?

Thank you in advance.
    
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post #2 of 13
It locks up because you need to up your Vcore, by the smallest increment you can at a time unil you find stability.

1. Ratio isn't that important anymore, everything is so fast as it is.
2. That number exactly. After multipliers and stuff the end numbers will be different but that happens. So if your FSB is 350, seting your RAM to 350 would make the 1:1. But it's DDR3, I am not very failiar with that but assume the clock works with the same basic principles
3. Don't know what you're asking... these are just preset steps for OCing.
4. WHatever you want it to be set to
5. Never leave thuff on auto unless it's some RAM timings you don't know about.

Intel's are generally very restricive...boooo

But, when you wana find your max overclock, set your memory to what it should be, or stock, and play with your FSB clock. If it's unstable or locks up, incease the Vcore in the smallest increment possible. Then test again where you left off but this time with the added Vcore. Once you found a wall then you can play with the memory. You need to change the voltage on the RAM once you get unstable also. Depending on your RAM you can overvolt to its specification. High end DDR2 is ~2.2V. I don't know about DDR3.

So you'll be fine, but don't leave the voltage on auto for anything unless you are unsure of it, then if you are, read up on it

Hope this helped
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Vegeta 2.0
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post #3 of 13
You are having trouble because it is a DX38BT. Sorry to tell you this, but this board is the WORST one you could have picked to overclock on.

Google "dx38bt overclock" and read the reviews to see for yourself...there are a million out there and they will all tell you the same thing.


Edit: I forgot to answer your questions lol.

1 - DDR3 speed should = 4x FSB speed, not 2x like DDR2. The reasons for this are very..in depth..so just take it as so.
2 - Since the bus speed for all Core2 processors = 4xFSB just like DDR3, you set the memory speed to be equal to the stock processor bus speed. A Q6600's default is 1066MHz, so that is what you would set your memory to as well (under stock settings that is).
3 - Reference frequency is the "nb strap". In other words, it sets the multiplier for the ram speed according to the FSB. For example, if your CPU runs 1066MHz at stock (266MHz FSB) and you want your ram to run in a 1:1 ratio in sync, you'd set the reference frequency to 266MHz and change the memory frequency to whatever. If you wanted to force your ram to run faster without having to increase the NB voltage so much, you would increase the reference frequency as you pass those "checkpoints". So once you hit 333MHz on your processor, change the reference frequency to 333MHz as well so that you don't have to overvolt the NB as much. Of course, if you increase the reference frequency without actually overclocking the FSB, your overall ram speed decreases. This type of tactic would be good if your ram was limiting your overclock, but I assure you its your motherboard in this case.
4 - Whatever you overclock to.
5 - Yes you need to manually increase it, but only do so once you've maxed your current overclock. Since you can't go past 3GHz, it may be a good idea to try and increase the voltage by a notch or two to get higher.
Edited by Manyak - 6/6/08 at 9:35pm
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post #4 of 13
Pretty much... Haha.

Maybe look at a different board in the future. But you can overclock with it, but not very well
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post #5 of 13
Thread Starter 
Thank you all for the input and and insight. Seems a lot of it is weighted on what Manyak said:

"You are having trouble because it is a DX38BT"

I appear to have stumbled with the board. Thanks for rubbing it in Se7en56

Curse you combo deals!!!

I will work with the vCore and see if I can get the FSB pass 300, to at least 320 and count myself lucky. Also thank you for the explaination of the DDR3 memory and how to set the DRAM.
    
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post #6 of 13
Thread Starter 
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post #7 of 13
Email mail me i will help you, NOTHING wrong with MB its a keeper. arminthompkins@cox.net I have mine clocked up to 3.4Ghz mem @ 1360
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post #8 of 13
Quote:
Originally Posted by warfactor View Post
Email mail me i will help you, NOTHING wrong with MB its a keeper. arminthompkins@cox.net I have mine clocked up to 3.4Ghz mem @ 1360
Way to dig up a 3 month old post!

But yes, the board is a lot better now with the BIOS updates.
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post #9 of 13
I'm going to go ahead and dig this old post back up

I'm using this board with an e8400 and seem to overclock more than 3.2

any advice or opinion?

Thanks

-Razz
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post #10 of 13
Quote:
Originally Posted by razzlor View Post
I'm going to go ahead and dig this old post back up

I'm using this board with an e8400 and seem to overclock more than 3.2

any advice or opinion?

Thanks

-Razz
PM rpm666 for help.
Also, do you have Enhanced Power Slope enabled, or disabled?
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