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Discussion Starter #1
Hello everyone, Im new to the site and have found it to very helpful in my quest to become a great overclocker
I've read a lot of the great faq and guides, but I have found myself struggling with one thing about the htt of my computer. I have my htt set to 3x and my frequency to 238 with a cpu multi of 11x. On my asus pc probe it states that my fsb is 952. Obviously 3x238 is not 952, but 4x would be. I've heard that my amd 3700 is 'quad pumped', so im guessing this is how it would be calculated, but im not sure what that means(regarding the 'quad pumped'. Any help with this noob question would be appreciated!
 

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have u tried dropping the htt to 2x see what it says then should only be 476 or somthing + it dosnt matter what your htt is at just as long as it is uder 1000

not so sure about the quad thing ?
 

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Well my computer wont boot when the htt is set to 4x, but im guessing that has to do with my memory. When I set my ram to ddr333 instead of ddr400 on the 3x multi it will boot, and when my memory is set to ddr266 instead of ddr333 it will boot on 4x? Im still getting the hang of this, thanks again
 

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I wouldn't bother with the Asus probe; they're often buggy and report reading wrong, like now. What you set in the bios is the correct HTT ie. 3x.

Intel's have a quad pumped FSB by the way, not AMDs.
 

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hey as far as i am aware the htt dosnt have anything to do with the memory only the HT so unless you rase the ht above 1000/1040 it shouldnt cause probs and thats a weird prob not sure about that one at all
 

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LDT/FSB Frequency Ratio= 1x, 1.5x, 2x, 2.5x, 3x, 4x, 5x. i would only suggest using 5x for use in combo w/ 200mhz HTT. Try 4x up to 235-245. 3x up to 245-265. and 2.5x from there on up. if your going for max HTT(like something over 300-350) try 2, 1.5 and 1x.
Adjusting for Ram Speed (divider) maybe needed above 230
which is what your doing,thus giving you more headroom as far as memory
you should be able to run 4x at 333ddr @ 238 fsb or higher
I would get some ddr3700 or higher
 

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Discussion Starter #7
Quote:


Originally Posted by enzo15

hey as far as i am aware the htt dosnt have anything to do with the memory only the HT so unless you rase the ht above 1000/1040 it shouldnt cause probs and thats a weird prob not sure about that one at all


Thats what I thought initially as far as calculating the fsb. Its weird that the pc probe would be that off? Im also wondering what you mean by setting the ht above 1000/1040. Could you please explain what these numbers mean? Thanks
 

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Most MBs do not run stable with the HT over 1040 - 1080 and beyond!
Keep it between 800-1000ish
 

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Discussion Starter #9
Quote:


Originally Posted by Raptor1

LDT/FSB Frequency Ratio= 1x, 1.5x, 2x, 2.5x, 3x, 4x, 5x. i would only suggest using 5x for use in combo w/ 200mhz HTT. Try 4x up to 235-245. 3x up to 245-265. and 2.5x from there on up. if your going for max HTT(like something over 300-350) try 2, 1.5 and 1x.
Adjusting for Ram Speed (divider) maybe needed above 230
which is what your doing,thus giving you more headroom as far as memory
you should be able to run 4x at 333ddr @ 238 fsb or higher
I would get some ddr3700 or higher



Here is what I have my system set to right now:

CPU Multi: 11x
HTT: 238
HTT Mulit: 3x
Memory divider set to ddr333 from ddr400
Timings: 2.5-3-3-6

Any suggestions on how I could get my system to boot at 4x?
 

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Discussion Starter #10
Quote:


Originally Posted by The Duke

Most MBs do not run stable with the HT over 1040 - 1080 and beyond!
Keep it between 800-1000ish

So basically dont set my ht to over 260 with a 4x htt multi?
 

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The HTT, HT (or LDT in DFI only) can be confusing.
The Mem Controler is available in 1-5x, utilize it x the HTT to get the 800-1000 factor.
Oh... yes 260x4=1040 which should be fine... beyond 260 drop to 3x
 
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Thanks for the great info, its all making a little more sense now!
 

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It was a bit of a challange at first ...
HTT and relative CPU effects and how it relates to the RAM's HTT factor.
Examp
HTT of CPU 250
RAM on a 1:1 the RAM HTT = 1250 with the default 5x Mem Multiplyer which would then require a reduction to 4x for an 1000MHz rate.
The divider will allow the RAMs speed more room to increase as you increase the CPU's HTT with RAM that can not match the CPUs HTT. Thus the need for 333 or 266 divider settings (re the Asus and others that do not have other measns of adjusting the dividers) where as some MBs have finer adjustments like the DFIs.
 

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Quote:


Originally Posted by GeneralSolo

Thanks for the great info, its all making a little more sense now!

Since it hasn't been mentioned, keep in mind that your HyperTransport speed will have no impact on your system performance. The bus bandwidth is so high that your system won't be negatively impacted with a 800 mhz bus versus a 1 ghz bus, so there's no reason to try to push it.
 

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Quote:


Originally Posted by sccr64472

Since it hasn't been mentioned, keep in mind that your HyperTransport speed will have no impact on your system performance. The bus bandwidth is so high that your system won't be negatively impacted with a 800 mhz bus versus a 1 ghz bus, so there's no reason to try to push it.

Good catch... I usually forget that factor when relating to keep it in the 800-1000 range.
 

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Discussion Starter #16
Quote:


Originally Posted by sccr64472

Since it hasn't been mentioned, keep in mind that your HyperTransport speed will have no impact on your system performance. The bus bandwidth is so high that your system won't be negatively impacted with a 800 mhz bus versus a 1 ghz bus, so there's no reason to try to push it.

Where would I start noticing a decrease in system performance? Is there a certain bus speed that I should not go below? And also, could you try to elaborate a little more on why there would be no impact? It seems counterintuitive that this would be the case?
 

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Quote:


Originally Posted by GeneralSolo

Where would I start noticing a decrease in system performance? Is there a certain bus speed that I should not go below? And also, could you try to elaborate a little more on why there would be no impact? It seems counterintuitive that this would be the case?

Picture this in your head....you're alone on the freeway driving along, would it matter to you if you had 5 or 6 lanes? Same thing with the HyperTransport Bus speed, it's overkill for your computer system. Lowering it from 1ghz won't make a difference. Is there a magic number to not go lower than? No,not really. Just keep it below 1ghz by using the next lower HTT multiplier as you raise your htt. To explain further, your system bottlenecks lay elsewhere in your system. Your computer can't sustain the use of a 1ghz HyperTransport Bus.
 

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Discussion Starter #18
Quote:


Originally Posted by sccr64472

Picture this in your head....you're alone on the freeway driving along, would it matter to you if you had 5 or 6 lanes? Same thing with the HyperTransport Bus speed, it's overkill for your computer system. Lowering it from 1ghz won't make a difference. Is there a magic number to not go lower than? No,not really. Just keep it below 1ghz by using the next lower HTT multiplier as you raise your htt.

Lol that makes a lot of sense. Thanks for the analogy! One more thing about htt, could my pc probe really be that incorrect stating that my fsb is 952 when my multi is 3x with htt at 238? Is there another program that I could use? I have looked in CPU-Z and a few other programs with no luck.
 

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Discussion Starter #19
Quote:


Originally Posted by sccr64472

Picture this in your head....you're alone on the freeway driving along, would it matter to you if you had 5 or 6 lanes? Same thing with the HyperTransport Bus speed, it's overkill for your computer system. Lowering it from 1ghz won't make a difference. Is there a magic number to not go lower than? No,not really. Just keep it below 1ghz by using the next lower HTT multiplier as you raise your htt. To explain further, your system bottlenecks lay elsewhere in your system. Your computer can't sustain the use of a 1ghz HyperTransport Bus.

Would these bottlenecks rest in such places as my memory? Using a higher rated module like ddr500, would this increase the likelihood my computer could sustain the use of a 1ghz HyperTransport Bus?
 

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Quote:


Originally Posted by GeneralSolo

Lol that makes a lot of sense. Thanks for the analogy! One more thing about htt, could my pc probe really be that incorrect stating that my fsb is 952 when my multi is 3x with htt at 238? Is there another program that I could use? I have looked in CPU-Z and a few other programs with no luck.

Trust your BIOS settings. If you physically change it to a 3x htt mult and set an htt of 238, you know what your system is running. It won't matter, but you can set it to 4X if it's bothering you. I'm running mine at 858 atm.
 
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