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Probs with finding max HTT

post #1 of 16
Thread Starter 
Hi all, I'm quite new to this board and to overclocking, so I'm wondering if there's some1 who can advise me.
I'm following the OC-Guide: HERE
Quite usefull for a n00b like me

At this moment I'm trying to find the max HTT value for my ASUS M3A32-MVP Deluxe/WiFi-AP with a Phenom 9850 and 2GB Kingston 8500
Sart Settings:
Reference Clock (HTT): 200MHz
CPU-MP: 8x (lowest on this board)
CPU-Voltage: 1.35V
HT-MP: 10x
RAM settings: DDR2400 @5-5-5-18-26-T2 (like in the guide)
RAM Voltage: 1.8V (lowest and default value)

Here's the problem:
240MHz I went to HT-MP:9x
250MHz, No boot, went to 8x
255MHz, Orthos was ok, but after reboot, pc won't start up, with a reset I saw that the CPU was @ 3187MHz(?!?) (odd, cuz 255*8= 2040MHz CPU-speed). So I Set HT-MP to 7x and rebooted
255MHz, It passes Orthos in windows, but failes to boot again. After reset, Saw the CPU Core @ 3120MHz ?!?, So I set MP to 6x
260MHz with HT-MP @ 6x. Booted fine.

Why does the PC show a Speed of 3GHz? When I do a manual calculation: 255HTT * 8x CPU-MP = 2040MHz?!?

I think that's why the PC won't boot untill I lower the HT-MP..
But what am I doing wrong?
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Sulaco
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post #2 of 16
Quote:
Originally Posted by XenoMopH View Post
At this moment I'm trying to find the max HTT value for my ASUS M3A32-MVP Deluxe/WiFi-AP
No you're not, You're trying to overclock the CPU and the memory (With the memory at a low Vdimm, no less), not find the max HTT for the motherboard.

To find the max HTT (or FSB) of a motherboard you underclock the CPU and the memory. Then when you get to where you're at now (OC failed), you'll know that you've hit the max HTT for the motherboard and not a CPU or memory limit.

Doing it your way, you have no idea why the overclock failed.
Was it the motherboard?
Was it the CPU?

From teh Guide you linked.........
So how do you regain stability? You need to adjust one or more of the above settings, but which one(s)? Do you add more voltage to the CPU? Do you loosen the memory timings? Maybe the HT multiplier needs to be dropped. You have no idea do you, and frankly neither do I. This is because we have no idea which part is causing the instability. It could be the CPU, memory, or motherboard. We have no idea because we broke a golden rule of overclocking, we did not isolate each part. Instead, we overclocked all three parts (CPU, memory and motherboard) at the same time. Since all parts are overclocked beyond their known stable settings, we cannot determine which part is causing the instability.

This brings us to the point of the discussion: you must isolate each part, finding its limits while keeping all other parts at or below their default speeds. The following three sections will walk you through how to do this. We start with the motherboard, move on to the CPU, then bring in the memory. It is a time consuming process when done properly, but it is by far the most effective method of overclocking.
was it the memory?

Edited by billbartuska - 5/23/08 at 8:09am
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post #3 of 16
Thread Starter 
Strange...I did exaxctly what the guide says:
I lowered my cpu speed (went from CPU-MP x12.5 to x8, which is the lowest on this board).
Set the vCore to 1.35V (maybe 1.3 is a better value)
Loosened the Memory to DDR2-400 With Timings5-5-5-18-26-T2 with standard lowest vDimm: 1.8V
And started with a HTT of 200MHz.
Followed exactly what the guide said....
Sulaco
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Sulaco
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post #4 of 16
Welcome to OCN.... one thing you should do is raise the ram voltage to specs for your particular ram.... probably 2.1-2.2V.
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post #5 of 16
Thread Starter 
Tnx ...
I know...my RAM works best @ 2.2V, but that's not the point I think. I want to overclock my Pehnom 9850, using the guide I posted above.
Wanted to check my max HTT for the board, so I lowered the RAM to DDR2-400
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Sulaco
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post #6 of 16
Quote:
Originally Posted by XenoMopH View Post
Tnx ...
I know...my RAM works best @ 2.2V, but that's not the point I think. I want to overclock my Pehnom 9850, using the guide I posted above.
Wanted to check my max HTT for the board, so I lowered the RAM to DDR2-400
Yep.... but you would still want to run the ram at spec voltage....
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post #7 of 16
Thread Starter 
OK, but why do I want to do that if I want to get the max HTT without isolating the Memory?...SO I underclock it right?...Like I did
Sulaco
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Sulaco
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post #8 of 16
Quote:
Originally Posted by XenoMopH View Post
OK, but why do I want to do that if I want to get the max HTT without isolating the Memory?...SO I underclock it right?...Like I did
Well, no, not exactly. You don't necessarily have to underclock the memory, you just make sure it doesn't fail when you raise the FSB. Running the memory at a low voltage, even if underclocked, may allow it to fail as you raise the FSB.

And sorry, it sounded like you were just plugging in numbers from the guide.

Keep notes too, with pencil and paper. Happy oveclocking..........
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post #9 of 16
Thread Starter 
Ah, ok, I'll check the Memory then. Maybe I can get passed 260 HT. (I've read that this board can go up to 380 - 400MHz).
The 9850BE uses an unlocked CPU-MP, but raising the MP clock won't get me passed 13.5x before it failes. Any tips on ow to get it more stable?
Edited by XenoMopH - 5/24/08 at 2:46am
Sulaco
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Sulaco
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Swiftech MCR320-QP Swiftech MCP 350 Swiftech MCP 350 W8.1 64 
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post #10 of 16
are you referring to the reference clock, or HTT clock? Two different things. On my M2N32 the reference clock overclocks the cpu, while the HTT clock overclocks or underclocks the HTT link. Since you have the multiplier at 8x it sounds like its the ref clock you are attempting to OC and not the HTT, as HTT link has only up to 5x mutliplier.

If you are attempting to isolate the max reference clock for your board, keep doing what you are doing, but to isolate htt link is a completely seperate bios config.

As for what you are doing currently and how its reacting. My M2N32-SLI does that when it doesnt like something ive done. Quite possibly you need to bump the nb voltage a tad or something. I dont know how high that particular board can go, but I was told the same for my board and was depressed to find out that there is a nice big hole around the 260-290 area in which the board freaks out and does exactly what you are saying. perhaps yours is similar...
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