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HELP: Overclock Q6600 with EP45-DS3L

post #1 of 18
Thread Starter 
Hello, I'm new to overclocking and would like some help in doing it.

I have started a little bit already by reading this old thread:

http://www.overclock.net/t/430544/overclocking-q6600-on-gigabyte-ep45-ds3l-motherboard/10


I was fairly successful in getting my CPU OC-ed to 3.0 GHz w/o issues. I have tested it with prime95 and is stable. biggrin.gif At the moment, with core temp. My CPU is maintaining a temp of 35-43 C but there is some load on it (just copying files from 1 drive to another).

I would like to know if I can get any further. Current goal is 3.4GHz!

Additional info for cooling is:

- CNPS9900A
- Zalman Z9 case and I have 6 fans installed. -1 for the one on the left side.

Let me know if I can provide more info to help you, help me! smile.gif

Thanks in advance!

~snow
post #2 of 18
Easily get higher than that.

More voltage in small increments and try and keep it as low as possible at all times. Work up in grandad fashion i.e. set the multi to the frequency you want and then keep trying to boot and run prime with voltages increasing by a few increments each time until you reach the minimum voltage it is stable at.

Watch out for heat and overvolting. Look up your CPUs thermal throttle temperature and the max TDP. Also make sure you do not exceed the maximum recommended voltage by much.
 
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post #3 of 18
Thread Starter 
Thanks for the reply!

Ah, so what would be your suggestion for increments?

Should I go something like:

3.1 - 3.2 - 3.3 - 3.4 or smaller?

or find whole number matches like 400Mhz * 8 is 3.2?

Aside from heat and overvolting, what are my considerations on my RAM?

I have 3 OCZ2P8004GK - makes it 6Gigs of RAM.
post #4 of 18
Thread Starter 
Hello again,

After a LOT of reading/research - trying to figure out what the values on MIT mean I am able to take all values out of auto and put actual values in them that work together.

I think I have found the "sweet" spot voltage for OC-ing to 3.2GHz.

VID is still 1.325V
VTT = 1.3V
(G) MCH V = 1.2V (What is this exactly?, I don't know if it's just coincidence but I tried to put VTT down to 1.28 and this to 1.18 and PC did not want to boot. I don't know if it is just coincidence.
FSB = 400MHz * 8 as multiplier

I followed the timings I saw on CPU-Z for my RAM and I have taken out the extra 2 Gigs.
My FSB:DRAM ration is already 1:1.

I have attached screenshots of my coretemp and CPU-Z values. It looks like my temp is bouncing in between 30-40C with little to no load. I am going to test it with prime95 for stability in a moment.




I guess my question is, is it possible to reach 3.4GHz with my build? I read that I should not try to go over my RAM frequency which is 800MHz. This OC is already 1:1.

I'd be glad to give additional details if needed. Thank you!
post #5 of 18
I could get to 3.0 GHz on stock voltage on my q6600 then about 3.1 ghz I hit a wall. It eventually ran stable for over two years at 3.6GHz but to get there I had to run it at 1.5 volts! Pay attention to your load temps more than the volts. These Q6600's can take a lot. I would say staying in the 70's under load is fine. Can you set your ram divider to slow your ram? You can take your ram past its rated speed if it will handle it. It may require more voltage or different timings to get the ram stable at higher speeds.
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post #6 of 18
Thread Starter 
I can't seem to find the right voltage to stabilize my 3.2GHz. It will boot but it will fail on prime95. The best setting I found was vcore 1.36875, vtt 1.36, vtt ref .911 and even this when running prime95 breaks core 3 or core 2. The temps were always good, staying put at around 52C max. So just partially stable?

Also, the settings above are after I gave up on OC-ing my RAM along with the CPU to make sure it's not something my RAM is doing. The only DRAM setting I change is the multiplier to make sure it does not go over 800MHz.

Something I noticed was while I was using 400MHz FSB and a multiplier of 8, my PC and prime95 says that my CPU is clocked at 3.6GHz. but CPU-Z and coretemp has the right values though. It looks like the only multiplier they know is 9? Is this a clue to my issue? In turn I also tried 363 and 9 as multiplier same problem. I can boot and work with it but when I run prime95, a core or 2 dies after about 5 minutes.

Can anyone give me specific advice this time? My OC is stable at the moment with 333 *9 and voltages a little above stock voltages along with the 5-4-4-15 timings on my OCZ RAM. I think my CPU did not want to run on stock voltages because I tweaked the settings along with my RAM, I increased it a little bit and it worked! Stable with prime95 by testing 1 hr of small settings then medium then about 5 hours of the blend test. temps never went above 52C.
post #7 of 18
You have ALOT of headroom with those temps. Keep giving your vcore more voltage you probably hit the wall. Keep giving it voltage till it passes while keeping the temps in mind. Like I said I ran my Q6600 for 2+ years at 1.5 volts and 3.6 GHz still works like a champ.These are tough CPU's.
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post #8 of 18
Thread Starter 
Not to dismiss the 2 awesome people who have given me inputs (thanks so much to the both of you!) but I'm a little sad (but I guess not surprised) that nobody is helping me out. frown.gif I rarely ask in any forums unless I really have to. Like I said, I guess it's not really surprising that nobody is interested in OC-ing my CPU because it's a little outdated and the "kids" are busy doing updated stuff, heh. So my only other purpose to keep posting here is to possibly help out the next 'me' who is probably just looking for answers!

I am starting a new approach because there was a lot of things I misunderstood about overclocking CPU. Mainly that it it is not directly related to your RAM, I guess it kinda is and I have not fully understood that as of yet but my point is - I am stepping back, start fresh and try to OC my CPU and my CPU alone, nothing else.

Steps I took:

1. Uninstalled Easy Tune and Dynamic Energy Saver - I read somewhere that the Dynamic energy saver might cause your OC to go unstable - makes sense to me as long as it makes sense to disable C1E and some other power saving modes which is consistent with what I read. I also uninstalled ET6, I had a gut feeling that it might not be so bad to do it and since I am prepared to do it straight from my BIOS and nothing else, I'm fine with it. The thing that I found out after uninstallling ET6? My OC disappeared! I did all my OC through BIOS but when I uninstalled it, it went back to original clock! I have no idea why and I am not going to dwell on that but I guess it was a good idea to do so! smile.gif

2. BIOS:
- Loaded optimized defaults, then figured all my stuff like 1st boot, ahci if you want to, native queueing, these things are personal preferences i think and should not affect my OC (I think).
- From advanced mode: Disabled EIFT and C1E and some other power saving modes for the fan and thermal readings as suggested all through my research. Disabling the power saving modes makes sense since you are going to monitor the health of your PC manually anyway for now and taking off load from the MOBO sounds like a good idea.

3. BIOS: Under M.I.T.
- Changed clock speed to 333Mhz, multiplier to 9, PCIE to 100MHz and Disabled CIA2
- Under DRAM Performance - Changed PE to standard and SPD to 2.40B to maintain 800 MHz as suggested in my reasearch. DRAM Timings - are all set to auto for now since my goal is to isolate CPU OC from RAM. According to CPU-Z it's using 6-6-6-18 rfc=46 cr=2t. Weird cause that's jedec timing for 400Mhz. Probably just choosing the most loose timing? (I have yet to understand loose timing and tight timing on RAM).

All voltages were taken out of auto and inputted the just NORMAL values manually.

RESULTS:

Boot Results - booted normally. Temps are in between 27-32C depending on the loads from the machine itself. Yey!

Prime95 stressting results:
- passed small ffts. Max temp 50C for 1hr.
- passed large ffts Max temp 47C(interesting, i thought this was for max heat and power consumption testing) for 1hr.
- passed blend test max temp 47 for 3 hrs.

Interesting result on Prime95, the "small" test made my CPU hotter than the other 2. This might be because it is a stress test for CPU itself but 2nd one states it's for max heat. Anyway, for myself, I consider this stable. Some might say you need to make sure to run prime95 for whatever hours (mostly 24) but I just can't justify me running it that long, I don't have full load on my CPU 24/7. So I think however many hours you run prime95 is a personal choice that should be dependent on how you use your PC. This again, all taken from my research that sits well with me.

So now I have stable 3.0Ghz OC-ed Q6600 that's running on "stock" voltage and RAM has not been touched so far.

BRB to try and get to a stable 3.2GHz! biggrin.gif
post #9 of 18
You can re-enable power saving stuff later after you verify your OC. Ram speed is related to the motherboard FSB speed and it can be changed with dividers depending on the options in your mother board. What is your ram voltage at? You will have to up the voltage if you want to run it at higher speeds or tighter timings. As far as ram timings go "Tighter" timings mean lower numbers and "Looser" timings mean higher numbers.
Testing in P95 I usually do 30 min for a quick checking when I am trying to climb quickly to the top OC. This will get you in the ball park then you can run longer P95 tests once you are at a speed and voltage you like. For full stability 8 hours P95 is usually sufficient for me like you said though its all a personal preference.
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post #10 of 18
Thread Starter 
Hi! Great timing, I think my problem now is directly related to what you just said. I cant figure this out.

At some point I figured that I should just keep upping my vcore to get a stable 3.2 OC but I kept adding on to VTT and VTT ref as well. When I raise VTT, MCH reference, raises itself as well just like the VTT ref. In any case WITHOUT touching the timings on the RAM or it's voltage, I think I was able to get a 'stable' overclock for the 3.2 because when I ran prime95 small test it ran for 10hrs straight no issues. But every time I run large or blend tests it failes on the 1024K test. I think I read somewhere that when it fails on the smaller values, it usually means CPU problem and when it fails on the larger values then it's RAM. So I tweaked my voltages a bit for MCH and raised the RAM voltage to mfr suggestions which is 2.1V. It would boot but fail the blend test then I'd just get a blank screen with some lines at the top. This confirmed my suspicions about the RAM settings. So then I removed the timings from auto and followed the JEDEC timings for 800MHz and upped the VTT and MCH voltages a bit. Now, it won't boot at all. frown.gif


Here are the settings I have:

CPU Vcore = 1.40625
CPU termination = 1.36
CPU PLL = 1.55
CPU Ref = .906

MCH Core = 1.32
MCH Ref = .841
ICH I/O = 1.55

DRAM V = 2.1

Timings on RAM

6-6-6-18
TRFC 195
CR 2T
static tread value 9


GMCH Latched to 400MHz
SPD 2.0D

With these timings I would think that I have enough overvoltage for MCH?
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