Optimize my overclocking - q6600 ga-ep35-ds3

split

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Jan 24, 2009
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Hello,
i just want to get out a little more..

my components:
CPU: Q6600
MB: GA-EP35-DS3
RAM: OCZ DDR2 PC2-6400 Titanium 4GB Edition Dual Channel
Graphic: Readeon HD 3780

My BIOS settings so far:
Robust Graphics Booster [Auto]
CPU Clock Ratio [ 9 X]
CPU Frequency 3.00GHz(333x9)
CPU Host Clock Control [Enabled]
CPU Host Frequency(Mhz) [333]
PCI Express Frequency(Mhz) [100]
C.I.A.2 [Disabled]
Performance Enhance [Standard]
System Memory Multiplier (SPD) [3.00]
Memory Frequency(MHz) 800 1000
DRAM Timing Selectable [Manual]
***** Standard Timing Control *****
CAS Latency Time 6 [5]
DRAM RAS# to CAS# Delay 6 [5]
DRAM RAS# Precharge 6 [5]
Precharge delay(tRAS) 18 [15]
***** Advanced Timing Control *****
ACT to ACT Delay(tRRD) 3 [Auto]
Rank Write To READ Delay 3 [Auto]
Write To Precharge Delay 6 [Auto]
Refresh to ACT Delay 46 [Auto]
Read to Precharge Delay 7 [Auto]
Static tRead Value 7 [Auto]
Static tRead Phase Adjust 8 [Auto]

System Voltage Control [Manual]
DDR2 OverVoltage Control [+0.2V]
PCI-E OverVoltage Control [Normal]
FSB OverVoltage Control [Normal]
(G)MCH OverVoltage Control [Normal]
CPU Voltage Control [1.38750V]
Normal CPU Vcore 1.32500V


My System is Prime95 stable for more then 15h and seems to be running fine.

My Questions: What can i do next, i tried FSB 366 but had an bluescreen while booting, is it smart to raise the vcore even more? Is it faster with more FSB but lower Multiplier when the processor is at its limit, mine seems to need a prity high voltage so far, whats it about the CPU:RAM ratio? i read about highten the FSB voltage for quadcores, is it better then vcore? whats the temp a q6600 g0 shouled have maximum at full thrust? can someone explain the "Advanced Timing Control" to me, i dont know mutch so far? any other recommendations?
i would be glad to have response,
split
 

split

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thx 4 reply,
i tryed around a little more but to run at 3200 the vcore needed to be to hight for my taste.. so atm i`m back to 3ghz. we'll see how long i can bare it :D
 
For more overclocking, you probably will need to increase the FSB and MCH voltage by .1, as well as the cpu voltage to circa 1.4. The mobo you have has more than desireable vdroop, so you will need to offset for that. Don't worry though, as most Q6600's will go to 1.5v or more without any problems.

Also, going from 333 to 366 is quite a jump, especially without raising voltage. I'm not surprised it wasn't stable. You may get 340 with stock voltage, but I would not expect more.

Also, for going much past where you are, I would recommend watching your temps. You are at the threshold where the voltage and temps start to increase.

As far as temps go, I have seen people take it as high as 127C and still not shut down. I do NOT recommend trying that though. Try to keep your temps to less than 65C, and you won't shorten the life of your cpu.

Advanced Timing Controls are useful when you know the complete specs of your RAM. If you don't know the specs, then I suggest you leave the parts you don't know to auto. You could slow your system down badly if you get these wrong.

Hope that helps...
 

billiardicus

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I've got a Q6600 OC'd to 3.3ghz (I can do 3.5 stable) on a GA-P35-DS3L.

1. Change "System Memory Multiplier (SPD) [3.00] " to [2.0] for 1:1 or synchronous mode. Right now your memory is OC'd. Don't OC your memory and CPU at the same time. Do them one at a time so you know where instability is coming from.

2. I didn't have to mess with MCH or FSB voltage until I got to 3.4 ghz, so I wouldn't mess with that yet

3. Keep increasing "CPU Host Frequency(Mhz)" and stressing the processor to see if it's stable. Read the guides stickied on here for stress testing info. Also, monitor your temps. Your cpu voltage is starting to get high...I hope you have a decent cpu cooler. See the stickied guides.

 

megabuster

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A quick question when do I need to add Voltage to (G)MCH or FSB while overclocking. If my memory is at stock freq, latency and voltage?
 

split

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thx for the suggestion Groveling_Wyrm. i tried FSB +0.1 MCH +0.1 with FSB366, CPU Multi 9 (3,3GHz) - RAM Multi 2.5. But unfortunately it was not stable even with 1.49 Vcore (my limit) and Prime95 displayed a error after about 8 minutes.
Is my CPU just to weak for the 3.3? is it unussual to need nearly 1.39V for 3ghz with the 6600? is there any sens in changing MCH +0.2 or any other ideas coming to your mind?
Billiardicus: what was ur vcore at 3ghz and with 3.4ghz?
for now i`m back to 3ghz with the old settings, running stable.
thx so far,
split
 

billiardicus

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I could do 3 ghz at my stock vcore of 1.25 vcore
3.4ghz takes 1.4v vcore, and +.1v to both FSB and MCH.
I run it daily at 3.3ghz @ 1.35 vcore at normal FSB and MCH.

But read what I wrote in point 1. Change your memory multiplier to "2." Your memeory could be what's causing the Prime95 errors!

As for MCH and FSB, you only need to increase the voltage on these when your FSB gets high. Technically your mobo is only rated for 1333 mhz, and you're trying 1466 (367x4). My GA-p35-DS3L is fine at that FSB, but yours may need a boost.
 



I would say that you would have issues with your ram as a possibility. When overclocking, you will probably need to loosen up your memory timings, voltages, or run higher multiplier to keep stable. Another thing to check would be your PCIE settings. On some motherboards, the PCIE ramps up with the FSB. Also, as mentioned, you may be approaching the limits of your motherboard, as well. Remember, that when overclocking, you are throwing everything out of whack, and that there are many things that can cause a problem.

Do be careful at those voltages. You are approaching heat warning voltages and that is the area where air cooling can start to fail you. Watch your temps carefully.

I would NOT change the MCH to +.2. You shouldn't need that much unless you are pushing the board over ~450 MHz or higher. You are far from that.

A possibility would be to change your multiplier to 8 and run a higher FSB. Some people get higher OC's that way. I did. For example, run 400x8=3200 vs 355x9=3195. That could get you a bit of a tweak that you wouldn't get with the 9x multiplier.

It is quite possible your chip isn't suited to the higher OC's. Consider the fact that at 3.0, you are already at a 25% overclock, and 3.3 you are at a 37.5% overclock, over already high stock speeds. Five years ago, this was not possible on air cooling. Not to dissuade you, but I personally would be happy with 3.0GHz. Anything more doesn't add much gain, but adds greater risk.



 

PeteRa

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Feb 12, 2009
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On a P5KC with Q6600 and 2x2Gb OCZ PC6400 SLI i have run with the following settings:
CPU Multiplier 8, Strap 333, FSB 433, RAM 1040 5-5-5-15-55 and
CPU Multiplier 8, Starp 400, FSB 400, RAM 800 4-4-4-12-45

Everest gives better ram performance readings in all read, write and copy tests with the 1040 (5:4) setting.
CPU is a bit higher 3.46GHz vs 3.2GHz in the 1040 setting.

I had to do pencil mod for the VDROOP and set CPU voltage to 1.3125V and set ram voltage to 2.1V and adjust CLK SKEW A to 150 to reach 1040MHz with this PC2-6400 (800MHz) memory.


 

EpicSaga

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CPU Host Frequency(Mhz) [333]
System Memory Multiplier (SPD) [3.00]
Memory Frequency(MHz) 800 1000

your ram is running on 1000mhz speed. thats the problem. try to pick another System Memory Multiplier (SPD) to hit safe mhz around 800, if you have ddr2 800mhz ram.
 

split

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Jan 24, 2009
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my ram is runing stable like this so far. but thx for the advide i'll try it with 800 fsb 400 and multiplyer 8 again.