EDITED - Question Re: Prime 95 Error Running Stock settings

[Herkulese]

Oops, meant 2400 mhz NB, not 200. Dur. I think you will be fairly lucky to hit 4 ghz with your chip, given how hot it is already getting, but if you can get there, hey, good on you. 2700 mhz NB would be a significant improvement over the stock 2 ghz.

I would actually be happy with 3.8ghz.
Heck I am happy with 3.4, but want to get the most out of it that makes sence.

BTW it is a C3 stepping, lower voltage.

 

[Herkulese]

OK, I have a confirmed Prime95 test at 3.8GHz.

FFT's - Small
Duration of Test - 16 Hours
Errors - None
System Monitor - HWMonitor
OC Type - Multiplier Only (19x200 = 3800mhz)
CPU Core Voltage Setting - 1.5v (+.25v Over Normal of 1.475v)
LLC Setting - Regular

Min Core Voltage - 1.152v
Max Core Voltage - 1.520v (Before, or very beginning of, Prime 95 test)
Steady Voltage throughout the test 1.488v
Idle Temp - 28c
Max temp - 57c
Steady at check points - 53c/54c/55c

 

[DrMrLordX]

Okay, try your NB next. Bear in mind that you will want to use different stress tests to verify the stability of a new NB setting.

 

[Herkulese]

Okay, try your NB next. Bear in mind that you will want to use different stress tests to verify the stability of a new NB setting.

Earlier you suggested a NB setting of 2400mhz.
Should I back off on the multiplier, or just leave it at 19?

Also, what other stress test should I use to verify stability?

I did run a rather long MemTest and found no issues with RAM.

 

[DrMrLordX]

2400 mhz NB is a fairly common limit for C2 and C3 chips, though you can probably go higher. Assuming you meant your CPU multi, you can either:

1). Leave it where it is
2). Save it as a profile in your BIOS (assuming your BIOS supports profiles) and go back to stock when testing NB overclocks

I'd go with option 2, get the highest NB clocks I could, and then I'd try 3.8 ghz on the CPU and my top-end NB clocks simultaneously to see what I could get.

Anyway, to test NB stability, memtest is a good idea, as is prime95 blend.

Are you currently at 2000 mhz NB? Or have you moved that already?

 

[Herkulese]

2400 mhz NB is a fairly common limit for C2 and C3 chips, though you can probably go higher. Assuming you meant your CPU multi, you can either:

1). Leave it where it is
2). Save it as a profile in your BIOS (assuming your BIOS supports profiles) and go back to stock when testing NB overclocks

I'd go with option 2, get the highest NB clocks I could, and then I'd try 3.8 ghz on the CPU and my top-end NB clocks simultaneously to see what I could get.

Anyway, to test NB stability, memtest is a good idea, as is prime95 blend.

Are you currently at 2000 mhz NB? Or have you moved that already?

I've not moved the NB at all yet, so it must still be at 2000mhz.
This is the next thing that I will try.
QUESTION 1: How far would you guess I could reasonably push it above 2400?

I ran a 9.5 hour MemTest at Optimized Defaults, with no issues.

I will plan to run MemTest and Prime95 after setting NB.
QUESTION 2: How long would you suggest to run each of them, knowing that memory is stable at stock Optimized Defaults?

QUESTION 3: Where do I look for BIOS profiles?
I don't think I have seen anything like that, but it may be in a place that I am not aware of.

QUESTION 4: A lot of atricals recommend OCing the HT as well. What are your thoughts on that?

 

[DrMrLordX]

Before you do any further overclocking, I'd recommend looking over your UD3 BIOS settings and getting as familiar with them as possible. Dealing with CPU speed is fairly easy - just mess with vcore and maybe LLC settings. NB stuff can be a wee bit more complicated.

Question 1: Depends on your thermals. Increasing NB speed/voltage doesn't do much to increase heat flux/temperatures, but NB stability decays pretty badly as die temperature increases (in my experience). With your temps, I would say 2400-2700 mhz NB is achievable. It depends on how much CPU-NB and NB voltage you want to give it. C3 chips can hit higher NB speeds than C2 chips.

Question 2: I would recommend a simple 5-10 minute Prime95 Blend or Linpack (using all memory) session every time you raise nb speed by whatever increment you decide to use. Keep doing this as you raise NB speed until you get problems booting, then back it off one step and do maybe 4-8 hours of Memtest 86+ tests 1-5/1-6 followed by 12-24 hours of Prime95 blend/Linpack/whatever.

Bear in mind that instability from NB problems will manifest itself differently than CPU instability. Sure, it can produce failure to post, though it can produce other annoyances, such as the claim that your BIOS is corrupt (this is a real PITA).

Question 3: not familiar with the UD3 BIOS. I would recommend starting with the manual to figure it out for yourself.

Question 4: HT overclocking is not recommended (note I'm referring to HT, not HTT). You will not see any increase in performance from increasing the HT.