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post #1 of 25
Thread Starter 
I have been outta the OC scene for a couple years. On my Athlon X2 system, I overclocked it like 3 years ago and forgot it. It ran fine until a few weeks ago when it suddenly wouldn't POST anymore. I guess the over voltage finally killed it (whats the average life of mobos and CPUs when overvolted anyway?)

At any rate, I upgraded (on the cheap) with the system in my sig. Most of the stuff in the BIOS is familiar -- CPU reference clock, CPU multi, memory multi, and HT. But of course the Phenom II's have the NB settings that can be tweaked, which I have a question about below. I will just list my questions one by one.

1) What is the performance benefit of having an OC'ed Northbridge? I have always kept the HT at stock or even under in order to achieve high CPU speeds. I hear NB, on the other hand, offers advantages if OC'ed (unlike HT). How much advantage?

2) I am more confused by voltages. In the past there was only Vcore for the CPU. Now I am seeing two different CPU voltage settings -- Vcore and NB CPU VID (this is different from the NB voltage itself). Should I worry about this "new" voltage setting or just stick with adjusting the old Vcore?

3) Right now I am running my CPU at 3.4Ghz on stock voltage (entire system is on stock voltage). My memory is running at like 1333 (which is below stock). I want to get the most out of this setup without significantly shortening the life. What kind of voltages should this mobo's NB be able to handle on air (with no additional NB cooling)?

4) My RAM is only rated at 1.5v. That is the stock setting. How much could this safely be increased?

5) What's the maximum safe temps I should aim for with this CPU?

6) What is the average OC people with the Phenom II 545 are seeing?
Edited by thiussat - 1/16/11 at 10:38pm
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post #2 of 25
RAM goes up to 1.65 on DDR3.
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post #3 of 25
Thread Starter 
OK been tinkering with this thing a little today and I can't really get any stable OC at all. I am running it at stock right now.

I think this board sucks. Either that or the CPU sucks. Either way, the best I have done is 3.4Ghz without any voltage increase, but I don't think even that is stable. I have gotten it to POST and boot at 3.7Ghz but it fails Orthos after a few minutes (this is with running Vcore at 1.425 and RAM at 1.6 with a NB increase as well). Since the NB cooling on this board sucks, I am reluctant to increase that at all.

Anyone have any luck OC'ing with this board or this CPU?
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post #4 of 25
Quote:
Originally Posted by thiussat View Post
OK been tinkering with this thing a little today and I can't really get any stable OC at all. I am running it at stock right now.

I think this board sucks. Either that or the CPU sucks. Either way, the best I have done is 3.4Ghz without any voltage increase, but I don't think even that is stable. I have gotten it to POST and boot at 3.7Ghz but it fails Orthos after a few minutes (this is with running Vcore at 1.425 and RAM at 1.6 with a NB increase as well). Since the NB cooling on this board sucks, I am reluctant to increase that at all.

Anyone have any luck OC'ing with this board or this CPU?
How are your temps holding up? For the cpu socket temp 62c is the max, but while OC'ing shoot to stay no higher than 55c. Max Vcore is 1.55v but stay at or under 1.5v for 24/7 use. Just watch your temps.

Adding cpu/nb freq won't raise temps that much on the NB HS, it helps the IMC (internal memory controller) in the cpu communicate at a faster rate to the memory which is a BIG plus for performance http://www.overclock.net/amd-cpus/81...ng-review.html

I'd try to get the cpu/nb freq up to 2600-2800MHz if possible, and leave the HT Link Speed as close to 2000MHz as possible. The cpu/nb voltage could start out at 1.2v, but may need as much as 1.35v (1.45 max). HT voltage should also be addressed and start with maybe 1.3v and a max of 1.4v. You may find the added cpu/nb freq will help stabilize higher clock speeds.

Also be sure to manually enter the ram timings and ram voltage into bios and than disable cool & quiet. Give that a try. Feel free to PM me if you need more help, always glad to help those that ask.
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post #5 of 25
Thread Starter 
Quote:
Originally Posted by The Sandman View Post
How are your temps holding up?
They are very good. When I had it clocked to 3.7Ghz at 1.425 Vcore, the CPU temp never went over 36C. Of course, the board later failed the stress testing as I mentioned above, but temps are not an issue. I am not sure about the NB temp; there is one sensor on this board that is stuck at 80c and never moves. There is a "system temp" sensor and it never goes much above 30c. But, all the temps the mobo lists are never over 36c.

Quote:
For the cpu socket temp 62c is the max, but while OC'ing shoot to stay no higher than 55c. Max Vcore is 1.55v but stay at or under 1.5v for 24/7 use. Just watch your temps.
How about CPU-NB voltage? That is new for me. Do I need to up it whenever I up the Vcore?

Quote:
Adding cpu/nb freq won't raise temps that much on the NB HS, it helps the IMC (internal memory controller) in the cpu communicate at a faster rate to the memory which is a BIG plus for performance http://www.overclock.net/amd-cpus/81...ng-review.html
Yeah this is the hardest part for me. The NB stuff was not around on AM2. I understand the principle, but it greatly complicates overclocking. In the past I could just downclock the HT because it has no effect on anything anyway. But, to my understanding, the NB and HT must be running at the same speed. This makes it difficult to both overclock the CPU and the NB/HT.

Quote:
I'd try to get the cpu/nb freq up to 2600-2800MHz if possible, and leave the HT Link Speed as close to 2000MHz as possible.
I didn't think this was possible. I have read in other threads that NB and HT must be the same. Did I just misunderstand?

Quote:
The cpu/nb voltage could start out at 1.2v, but may need as much as 1.35v (1.45 max). HT voltage should also be addressed and start with maybe 1.3v and a max of 1.4v. You may find the added cpu/nb freq will help stabilize higher clock speeds.
OK, I will look into increasing CPU-NB voltage more than I have.

Quote:
Also be sure to manually enter the ram timings and ram voltage into bios and than disable cool & quiet. Give that a try. Feel free to PM me if you need more help, always glad to help those that ask.
I haven't even got to RAM timings yet. I am just letting them go to default. Should I just keep my RAM at its lowest clock speed until I get CPU and NB figured out?

Thanks alot for responding. I was beginning to think no one cared.
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post #6 of 25
Quote:
Originally Posted by thiussat View Post
(whats the average life of mobos and CPUs when overvolted anyway?)
Idk, but they usually outlive their usefulness, overvolting the cpu deteriorates transistors inside the cpu.
post #7 of 25
Quote:
Originally Posted by thiussat View Post
They are very good. When I had it clocked to 3.7Ghz at 1.425 Vcore, the CPU temp never went over 36C. Of course, the board later failed the stress testing as I mentioned above, but temps are not an issue. I am not sure about the NB temp; there is one sensor on this board that is stuck at 80c and never moves. There is a "system temp" sensor and it never goes much above 30c. But, all the temps the mobo lists are never over 36c.

System temp is probably the mobo it self, keep an eye on it but it will probably not be much of a factor at this point.

How about CPU-NB voltage? That is new for me. Do I need to up it whenever I up the Vcore?

No, you'll need to raise this while increasing the CPU speed and CPU/NB Feq to gain stability. Usually start at 1.3v or so and if prime only fails with one or two workers than increase cpu/nb voltage. If it BSOD than more Vcore.

Yeah this is the hardest part for me. The NB stuff was not around on AM2. I understand the principle, but it greatly complicates overclocking. In the past I could just downclock the HT because it has no effect on anything anyway. But, to my understanding, the NB and HT must be running at the same speed. This makes it difficult to both overclock the CPU and the NB/HT.

There are different multipliers for each one, reduce HT to maintain 2000MHz and increase the cpu/nb freq. The more cpu/nb freq = more cpu/nb voltage. It's not the same as old school NB which was chipset voltage.


I didn't think this was possible. I have read in other threads that NB and HT must be the same. Did I just misunderstand?

Yes it is written that both HT and CPU/NB should remain the same but that has also been proven wrong. Increasing the CPU/NB Freq will greatly increase performance. It's easy to see if you run Everest memory benchmark or Maxmem2


OK, I will look into increasing CPU-NB voltage more than I have.



I haven't even got to RAM timings yet. I am just letting them go to default. Should I just keep my RAM at its lowest clock speed until I get CPU and NB figured out?

I would enter all stock settings into bios to help with stability at this point.

Thanks alot for responding. I was beginning to think no one cared.
Heck no, we do care and that's why a good majority help others, it sometimes takes a bit for someone to actually get back with you is all.
Now if I could only figure out how to quote things properly like you did lol. Sorry about that read above closely and you'll see I did respond you each of your questions lol.
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post #8 of 25
Thread Starter 
OK here's where I am right now:

Clocks:

CPU: 3.7Ghz (265x14)
HT: 1855
NB: 2384
Memory: 1412Mhz (7-7-7-20-27-1T)

Voltages:

Vcore: 1.475v
Memory: 1.6v
CPU-NB: 1.3v
NB: 1.2v

OK, I can get it to boot just fine, but after about 2 minutes of Orthos RAM testing, it BSOD's. And I wanted to show my BIOS setting screen so we can be on same page. I don't have a "HT voltage" but have a Northbridge voltage (which I assume is the same). Any ideas on what to try?



NOTE: the settings I have above are not the same as I have right now. I only pasted this to show what settings my BIOS has.

EDIT: OK, I just passed a 5 minute Orthos RAM test after upping Vcore and CPU-NB one notch. So the settings I currently have are what is listed above (in my post, not the photo!).

Now, should I mess with RAM timings any? Should I move the HT multi up a notch? Also, the NB voltage, is that for the HT? If so, can I lower it to stock since the HT is below stock? I thought the temp sensor for NB was stuck at 80c, but after upping voltage it has moved to 81c. So, I wanna keep the voltage there as low as possible.
Edited by thiussat - 1/17/11 at 9:12pm
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post #9 of 25
1600 CL9 Ripjaws can usually get good results up to 1.7V in overclocking, some managing CL7-8-7. For IC longetivity reasons I don't recommend any further than 1.75V.
1423 7-7-7 may be just a tad bit over unstable.
post #10 of 25
Thread Starter 
Quote:
Originally Posted by xd_1771 View Post
1600 CL9 Ripjaws can usually get good results up to 1.7V in overclocking, some managing CL7-8-7. For IC longetivity reasons I don't recommend any further than 1.75V.
1423 7-7-7 may be just a tad bit over unstable.
Yeah I don't have ripjaws. I have this memory kit. Right now I have it at 1.6v (it's rated at 1.5v).

I have been messing around some since my last post. I now have these settings:

Clocks:

CPU: 3.7Ghz (247x15)
HT: 1975
NB: 2470
Memory: 1640 (9-9-9-24-33-1T)

Voltages:

CPU: 1.475v
Memory: 1.6v
CPU-NB: 1.325v
NB/HT: 1.2v (stock is 1.1v)

This allowed me to increase the NB freq without having to go up to the x10 multi (I am getting BSOD's when I move it to x10). It also brought my HT back closer to stock (it allowed me to raise HT to x10).

I imagine I need more CPU-NB voltage to get my NB freq any higher. No matter what my CPU clock is, it BSOD's when it gets much above 2400 (that is, if I lower multi and up CPU clock, it BSOD's. And I get same result if I lower CPU clock and raise multi to x10).

How much higher can I go on CPU-NB voltage for 24/7 usage?
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