Treckin's 955BE 4Ghz Daily OC Thread

[treckin]

I thought I would start this thread so that anyone else out there who wants to find a stable 4Ghz clock for their 955/965 can check out what others have done.

First, the specs:

$140 | Phenom II x4 955 BE C3

$55 | Zalman 9900ALED

$75 | Asus M4A79XTD Motherboard

$93 | GSkill Ripjaw Series 9-9-9-9 DDR3

$8 | Thermaltake ram slot dual fans

$200 | 2x Asus EAH4850's in Crossfire |core:720 | ram:1150 |

$free | 2x Seagate 300GB SATA HDD's in RAID 0

$70 | Antec TruPower 650 Modular PSU

The reason I bought these parts was simple; PRICE. These suckers were cheep, plain and simple. Almost everything here was done combo'd up on Newegg, and the whole thing was less then $600.


I originally posted this in another thread, but I didnt want to hijack, so Ill repost here:

I want to get it to 16x on the multiplier, but I have to reseat my Zalman 9900ALED cooler.

It makes a huge difference. The first time I seated this chip a month ago, it idled at 27 and hit 37 under load at ~3.8 and 1.5xVID. I had to reseat the proc, and I didnt do as good a job this time. Now it idles at ~40-45 at 4.0 and ~1.6VID.


If I were to **** with it some more, I would like to get a higher multiplier (16 or 16.5) and a higher NB/HT overclock.
Being able to take the ram to 2000+ would also be nice

This setup runs p95 blend for a so far indefinite period with no errors.

FSB is 260 if you cant see. I had it set to 265 but it was giving math errors with higher voltage in prime.

 

[treckin]

Part 2

Ok, as I said, that last push ^ was old, about a week ago.

This is all on Win7x64 btw.

Now, I have some new settings

First, the screenie:

I forgot to hi-light it but this config runs about 10 deg C cooler at idle and 8-9 deg C cooler load (idling at 35c vs 45c)

If if didnt mention it, these are all stable, passed at least 3 sets of 10 Prime95.

I decided to drop my ref clock down further from 260 to 250, and I settled on 16 as my multiplier. Doing this allowed me to loose a lot of core voltage at the same resultant clock freq, and I therefore am more stable/more cool under max power consumption stress testing.

Because my ref clock is now lower, however, my ram is going to run at 'only' 1666. Because of this I dropped the timings from 9-9-9-24 @ 1.5v to 8-8-8-24 @ 1.6v. As I understand it, timings can be more important then raw bandwidth, especially on wide chips such as the PhIIx4.

I included a screenie of the voltages page because I wanted any passing lurkers to take note of the voltages I had to up to get this stable.

CPU-NB (IMC) vid = 1.2875v
HT-vid = 1.260v
NB - 1.28v (pic says 1.3 but its wrong, dbbl checked bios)
SB = 1.35 <- would not boot with out this, but WOULD boot with 1.65 vcore and w/o this. GOOD SETTING)

 

[Wmtelsr1]

treckin,
I am new to AMD phenom II x4 systems. I am planning on getting one soon 955 Black Ed.. I have looked at alot of info in the last 2 days, only to find that I know very little about putting together a good planned system. I want to build a machine that i will not have to upgrade anytime soon. I will be using it for learning AutoCAD and controlling a HF rig. I was not sure what mother board was best, only that I didn't need on-board video. I am not sure that I even need to OC it, except it seems the thing to do "get more out if you can". i think that AutoCAD on a home computer is a good reason to OC.

I am new and do not know much I wish there were a book or two that I could read to get up to speed. I saw your parts list and was impressed. your tag says new member ,but you sound as though you understand the the way the chip work. I could use help to understand it as well. i guess it will take time and a few mistakes lol.

Thank You

 

[trents]

Are you using AOD to overclock instead of manually overclocking from the bios?

 

[beenthere]

It just depends on what you need and what you're definition is of "stable". I require no errors in Prime 95, OCCT, IntelBurn, etc. when run 24/7. I can get 4.0 GHz with 1.5V CPU, CPU-NB @ 1.2V with SB/HT @ 1.3V. I'm not sure jacking the power on all of these is worth the small performance gains for my use when I can run 3.7 GHz. with all default settings resulting in 10 C cooler CPU temps under full load.

 

[EckoUnltd]

Are you using AOD to overclock instead of manually overclocking from the bios?

I'm wondering the same...... Input from OP please