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Phenom II steppings and max OC 550-940 - Page 270

post #2691 of 2829
12.5 Hours running P95 Blend
6 hours running P95 Small FFTs
14 Hours running p95 Blend

I am stable running the Phenom II x2 555 BE unlocked to Quad Core at 3.8 GHz. I have not had a single crash or error since I boosted the voltage up to 1.38125 in Bios with LLC at 3.xxx %. HWMonitor is reporting voltages of 1.38 - 1.47. Low of 1.01??? That has to be a misread, doesn't it? Oh and running on air cooling, the temperatures are between 43 and 46C under a load and 31C idle.
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post #2692 of 2829
x4 955BE CACY CA Rev. RB-C3

3616 MHz w/ Mugen 2 Rev.b. HS/Fan using included TIM.

A-Data DDR3 2x2GB 1600MHz 9-9-9-24
1.6V




    
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post #2693 of 2829
i just got an AMD PhenomII x2 555 rcb3 3.2 i clocked it to 3.6 and unlocked all the cores on stock voltage and ran prime95 for 2 sets of 30 minuits and passed the only temp that seemed to be a problem is the vcore temp at 77c to 78 c on a gigabyte ma770t-ud3p.is 79c too hot for the vcore on this board ,and also what is the max temp on the core and cpu of the aforementioned processor?????any will be apreciated
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post #2694 of 2829
Thats way hot.

For longevity and stability I personally don't drive my CPU over 58C. Literature states 62C, and sven if Manuf. stated limit is conservative, you're still looking at 66c - 70c being near tolerable limits for any sustained period of time.

Take the temp from within Windows with both Core Temp and CPU-ID System Monitor.

Average the two sources with what the Bios is reporting.

Keep in mind Bios temp is neither idle nor @load so it's hard to judge.
    
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post #2695 of 2829
Thread Starter 
Quote:
Originally Posted by detta View Post
i just got an AMD PhenomII x2 555 rcb3 3.2 i clocked it to 3.6 and unlocked all the cores on stock voltage and ran prime95 for 2 sets of 30 minuits and passed the only temp that seemed to be a problem is the vcore temp at 77c to 78 c on a gigabyte ma770t-ud3p.is 79c too hot for the vcore on this board ,and also what is the max temp on the core and cpu of the aforementioned processor?????any will be apreciated
That is way too hot indeed! Never go pass 62C, or you cpu will have a very short lifetime! Get better cooling I'd say
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post #2696 of 2829
* Phenom II 925
* CPU stepping 2
* Revision RB-C2
* 3500, 250MHz, 14x
* CPU voltage 1.45V
* CPU-NB voltage 1.3V
* Northbridge clock 2500 and voltage 1.2V
* HTT link speed 2000 and voltage Auto
* motherboard used Asus M4A79XTD Evo
* motherboard BIOS revision 704
* type of cooling Air (Cooler Master V8)
* OS Windows 7 32-bit
*

I'll try get it higher sometime, but I'm relatively happy with this! Glad I reached 7 hours stable Blend. I didn't read the stepping off of my CPU when I got it, and I don't have any thermal paste to reapply my cooler. Sorry!
post #2697 of 2829
I tried starting a separate thread on this but got no bites. So figured I might be able to find some help in this thread.

I finally unlocked Phenom II X2 550 BE and the best I have done so far on 4 cores are

Core: 3675.00 Mhz
Multi: 17.5x
Bus Speed: 210 Mhz
HT: 1980 Mhz

The was done using a Vcore set @ 1.50 in the BIOS. Hardware Monitor was showing MAX Vcore of 1.47v
NB voltage @ 1.175
Ram voltage @ 1.575
This was 6 hours stable with OCCT:Linpack, haven't had time to test it further.

However, this was only accomplished with lots testing and failures. It was not easy getting to that clock.

My issues are:

I cannot seem to achieve any overclock higher than what is listed above that is remotely stable. Any increase in multiplier, CPU Bus Speed (even by 1 or 2 mhz) leads to system that almost instantly fails under stress testing.

Also when my overclocks fail its not usually with the termination of OCCT or Prime 95 showing an error. The failures typically occurs with a BSOD and a system reboot. As a result I cannot tell if a particular core is failing. I am thinking that the BSOD/reboot is due to insufficient NB voltage, but I have already pushed 1.25v in other testing

It also seem like I am using a lot of voltage to get hair under 3.7 ghz in comparison to others results who are hitting the same speeds with much less voltage. However, the system is not running hot at those voltages. The max temperature I was hitting was 46c - 47c according to motherboard, since the cores no longer register. Does anyone think is okay to run more voltage since my temps aren't that high.

I have also tried lowering the BUS Speed to down to 200 and running a multiplier above x17.5 to achieve a clock above 3675 mhz, while keeping my voltages list above constant, which also leads in stress test failure. My CPU doesn't seem to like an multiplier above 17.5 unlocked.

It just seems that I have hit a wall 3.67 ghz and cannot break past it. I am not looking for 4 ghz, but am trying to figure out why I am having so much difficulty getting to 3.6 ghz. Am I doing something fundamentally wrong? or maybe I just have a "bad" chip.

Any advice is appreciated and thanks in advance.
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post #2698 of 2829
It seems like whoever started this thread isn't updating the database.
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post #2699 of 2829
Phenom II 955 BE
Stepping 2
Revision RB-C2
Random numbers on cpu HSF - 0915DPAW - 9118522D90403
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post #2700 of 2829
* Phenom II 925
* CPU stepping 2
* Revision RB-C2
* 3640, 280MHz, 13x
* CPU voltage 1.525V
* CPU-NB voltage 1.3V
* Northbridge clock 2520 and voltage 1.22V
* HTT link speed 1960 and voltage Auto
* motherboard used Asus M4A79XTD Evo
* motherboard BIOS revision 704
* type of cooling Air (Cooler Master V8)
* OS Windows 7 32-bit

Pic is a bit blurry, it was a 6 hour prime95 blend, max CPU temp was 48 C.

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