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T1055 + Asrock Deluxe 3, First time OC

post #1 of 10
Thread Starter 
Hi everyone

First time overclocking here so I'm trying to do my homework and take things cautiously, the rig is in my signature. I've mainly tried to prepare my rig for what's to come so I haven't really changed the FSB yet - here's the stuff I've done:

Cool 'n' quiet - disabled
CPU active core control - disabled
Turbo Core - disabled
IO c-state support - enabled (didn't touch this one but what is it? Couldn't find info)
Spread spectrum - disabled
Disk write cache - off

I have also created a system image backup and a repair disk of my OS after I had installed all the necessary programs & drivers (firewall, antivirus, spyware removal, CPU-Z, Prime95, speedfan, coretemp, AMD overdrive). I also saved the default profile in BIOS to one of the three custom profile slots.

Temperatures:
Ambient: ~21C
CPU idle: 47C (BIOS, don't really buy this one..), 34C (Speedfan, sounds ok)
Core idle: 30C (Core temp with +10C offset), 20C (Speedfan, no offset, seems ok if offset added)
System (speedfan) idle: 37C
M/B (BIOS) idle: 42C

I tried to do a short 1 run blend with Prime95 to get an idea about load temps but didn't really get higher than 38-39C on both Coretemp cores and speedfan CPU. I have no idea what is normal without any OC.

RAM is on auto and running 9-9-9-24-2T @ 1.409V (wonder why it's overvolted auto when memory is rated 1.35V?). I suppose I could pump the FSB up until the RAM starts to close on its rated frequencies without changing much (voltages or ratio)?

Before doing anything else I probably need to update my BIOS too but other than that I think everything is in order. I will be updating this thread as I go, any tips & comments are welcome!
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post #2 of 10
Overvolting slightly on the ECOs is no problem, but you really should be running at the rated 1600Mhz 7-8-7-24. Better yet, push the voltage to ~1.5V and you can run 6-8-6-20; I have not seen a single ECO kit that could not do 6-8-6
post #3 of 10
Thread Starter 
By the way, in many guides it's said that one probably faces trouble with RAM first but if I've understood right I only need to start worrying about that when the DRAM frequency goes past 800MHz (since the ECOs are rated at 1600)? My RAM was set to 667MHz on auto since my mobo apparently only supports 1600 through OC.

Also in spite of reading threads about the subject and trying to grasp it, how does one actually detect that say NB is the one hindering the OC? Is it just a process of elimination if you can test it's not the RAM or heat?

The good news seem to be that I managed to install my Mugen properly, of course the temps are still low due to low clocks but it's passing 30+ min prime blends with around 37-38C on the cores (with that 10C added).

P.S. Mildly OC'd my GPU and made a custom fan profile for it before starting with this, should I have waited and worked on the CPU first?
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post #4 of 10
Slightly above 1600 should be fine. Heck you could each reach 2400Mhz if you loosened up the timings to a not-too-shabby 9-11-9 (for 2400Mhz at least).Your motherboard does NOT support 1600Mhz through OC only. There is an undocumented x8 multiplier that allows you to use 1600Mhz with all AMD CPUs, and with an x6 processor it is no problem. You should be ignoring everything the motherboard says about memory speed support anyway, the memory controller is integrated on the CPU now (as has been on AMD since 2003 with Socket 754!) and not on the motherboard anymore so what they say is completely irrelevant.
post #5 of 10
Thread Starter 


Hey again, so as you can see I'm at 3.5GHz and I haven't encountered any instabilities thus far but I have couple of questions. The core voltage is set as 1.2750 in BIOS (no voltage increase from base), but during load CPU-Z reports it at 1.374 max (while still ok, why?).

Another issue is that while my core temperatures (see Core Temp vs speedfan, core temp has +10C increase to represent real core temps) are around 48C at their highest the CPU temp hanged around 54-57 (both speedfan and everest) during a longer part (640K) of the test but went up to 60C with 8K at which point I stopped the the test. There's effectively a 10-12C gap between core temps and CPU temps, is it just a sensor issue or could there be something else here? My thermal paste hasn't had the time to go through the break-in period yet so I am hopeful in that sense. Motherboard temp goes to about 40C at its highest.

I wasn't planning on OCing the chip any higher than this and while I haven't encountered any instability the temperature problem stops me from doing proper testing. DRAM frequency is 666.7MHz with 7-7-7-20-27 T2, I might try to tighten those up a bit and get to T1 if this thing gets sorted out. I'm considering just hanging in there for the break-in to happen or getting some better fans.
Edited by Clocksmith - 2/10/11 at 4:40am
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post #6 of 10
Have you disabled turbo core?
At 1333Mhz you could manage 6-6-6 or possibly 5-6-5
post #7 of 10
Thread Starter 
Yep it's disabled, one thing that helped was changing LLC from auto to slight. It was giving 1.394v during load beforehand, now it's giving 1.334v max keeping the prime95 running at 55C CPU max. Although it still claims the cores to be 10C below the CPU temp even with the 10C offset in place. I will probably let it rest at this OC.

I guess I'm going to either try those timings or run it at 1666MHz and try to get that 6-8-6? Since this is quality ram it should be able to pull that off..
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post #8 of 10
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Tried tweaking the RAM @ 1666MHz, gave it 1.496v with 6-8-6-20 and 6-8-7-20, it finally booted to windows with 7-8-7-20 but I soon noticed some instability. Switched to 1333MHz and tried 6-6-6 clocks at 1.409v (I can choose between 1.322, 1.409, 1.496 before it starts giving options in tighter voltage range), no go, upped the voltage to 1.496 and it booted but with severe instability (as in memtest found an error with 1.5% tested or so). Now it's at 6-7-6, no signs of instability yet but memtest is going to run for several hours now to see what happens.
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post #9 of 10
Thread Starter 
Currently: RAM 1666MHz 1.496v 7-8-6-22-28 2T, NB 2250 stock, FSB 250 stock (1.334 LLC max), HT 2000. Prime95 load temps have dropped (arctic silver breaking in I'd guess) to 55C with short length testing, although the temperature perversion between core and cpu temps still exists.

It has been fun tweaking this, alongside with the GPU clocking it has been a 2000 point increase in 3dmark06. I like the fact that it has been gained without a) any BSODs b) increasing any other voltages than the RAM.

I will probably keep on trying to figure far I can get within acceptable temps and stability and probably buy some better fans for the cooler and/or remount it. I would like to thank you guys (other than xd_1771 ) for not responding since that forced me to figure out most of the stuff myself so I learned more in the process.
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post #10 of 10
Interesting... try upwards of 1.6V? should be able to hit 6-8-6 easy at 1.5-1.6V at 1600Mhz (1666Mhz may be a bit finicky though)
Edited by xd_1771 - 2/15/11 at 6:28pm
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