• Thanks: 8

Topic: 'off-topic': Overclock QX9650 processor

Hi,

I just made a good deal on a QX9650 processor which has an unlocked multiplier. I hope that I will get more out of SVP. This is great for my Asus P5G41T-M LE which seems to have a limitation of the FSB of 399 (I used to own a Q9450 and with my board I just could not get the FSB past 399 no matter what I did with voltages etc.).

I m on watercooling so I want to give 4.0Ghz a shot with the QX9650. What I want to know is how to do this so I have some questions about this


1. CPU VID
With the QX9650 an option comes available in my bios when changing the multiplier from it s default 'auto' setting to a manual multiplier. This is the so called CPU VID which can be set from 1.1375V - 1.6000V. Can someone tell me what this does and what recommended voltage is to set it on looking at my goals of 4Ghz? And also what the maximum safe voltage is to put it on?

2. FSB
What the best/highest performance value to put the FSB on (in my BIOS the FSB is called CPU freq):

333 (default) with multiplier 12 which results in 3.996Ghz
348 with multiplier 11.5 which results in 4.002Ghz
363 with multiplier 11 which results in 3.993Ghz
380 with multiplier 10.5 which results in 4.000Ghz
399 with multiplier 10 which results in 3.990Ghz

I know these values also have their influence on the speed of my DDR3 memory, 2x2 GB Kingston KVR1333D3N9K2/4G. (With my previous q9450 I owned I ran my system on FSB 399 with x8 multiplier (3.2Ghz). With this setting my memory speed was 1596Mhz and it was stable).

3. MEMORY VOLTAGE
I can set this from 1.21000 - 2.47000. I assume it will depend on the FSB I choose if I can leave it on 'auto' (default) or increase it to max. 1.6-1.7?

4. NB VOLTAGE
I can choose from 1.12500 - 1.51875 for this. What does it do? What would you guys recommend with the goal (4Ghz) I have? And what the max safe voltage?

5. VTT VOLTAGE
I can choose from 1.20000 - 1.59375 for this. What does it do? What would you guys recommend with the goal (4Ghz) I have? And what the max safe voltage?

6. CPU OVER VOLTAGE
I can choose from 0.01000 - 0.63000 for this. What does it do? What would you guys recommend with the goal (4Ghz) I have? And what the max safe voltage? Also a not selectable option called 'Offset Sign' appears with a '+' when switching from 'auto' to manual.

7. SB 1.5V VOLTAGE
I can choose 1.5V or 1.6V. What does it do? What would you guys recommend with the goal (4Ghz) I have?

Thanks for all input!


Hardware/Software:
Asus P5G41T-M LE with 0901 firmware
Intel Core2Quad QX9650 with unlocked multiplier
2x2 GB Kingston KVR1333D3N9K2/4G
MSI GTX460 Cyclone 1GB GDDR5
OZC ModXStream Pro 600W
W7 64-bit

Some screenshots:
http://imageshack.us/gal.php?id=sZankp2 … auZo83b2pU

Re: 'off-topic': Overclock QX9650 processor

THX-UltraII
I m on watercooling so I want to give 4.0Ghz a shot with the QX9650.

... and it still'll be slower than i5-2300 at stock clocks. More like i3-2120 big_smile

  • Rimsky
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Re: 'off-topic': Overclock QX9650 processor

THX-UltraII
1. MAX voltage = normal voltage + 10% cool cooler required!
2. FSB must be multiplier=2/4 to RAM clock, so prefer FSB=400
3. MEMORY VOLTAGE does not depend on the FSB so much, maximum 0.1-0.2V DDR3? See the spec for the normal voltage for you RAM
4. Voltage of the north bridge Dont tuch this voltage
5. -
6. At the higher load MB drop voltage a bit, so OVER VOLTAGE take advantages to negotiate this drop
7. Southbridge Dont tuch this voltage

MB is not so good for the extremal overclocking QX9650

And even over 4.0GHz QX9650 have't enought powerful for i7 profile

  • Thanks: 8

Re: 'off-topic': Overclock QX9650 processor

Chainik
I could trade my q9450+$15 for a q9650 so this upgrade was a no-brainer.

  • Thanks: 8

Re: 'off-topic': Overclock QX9650 processor

2. FSB must be multiplier=2/4 to RAM clock, so prefer FSB=400

With a fsb that high (333=default on my mb) I would need a higher NB Voltage don t you think?

3. MEMORY VOLTAGE does not depend on the FSB so much, maximum 0.1-0.2V DDR3? See the spec for the normal voltage for you RAM

? With a higher FSB my memory will run at a higher speed so the Memory Voltage has it s affect on this very much?

5. -

Whats ' - ' ?

6. At the higher load MB drop voltage a bit, so OVER VOLTAGE take advantages to negotiate this drop

But what is the actual difference between CPU OVER VOLTAGE and CPU VID?

7. Southbridge Dont tuch this voltage

check!

And even over 4.0GHz QX9650 have't enought powerful for i7 profile

Who's saying I m aiming for the i7 profile? All I did was trade my q9450+$15 for a qx9650. Like I said a no-brainer I think wink
btw. I doing video hardware acceleration with SVP with a GTX460 so I might be able to reach i7 after all?

  • Rimsky
  • Installer Master
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Re: 'off-topic': Overclock QX9650 processor

THX-UltraII

I would need a higher NB Voltage don t you think
I dont think so

With a higher FSB my memory will run at a higher speed so the Memory Voltage has it s affect on this very much?
run CPU-Z and search for a voltage for different frequency

Whats ' - '
i dont know

CPU OVER VOLTAGE and CPU VID
voltage on the cpu = CPU VID + CPU OVER VOLTAGE

I doing video hardware acceleration with SVP with a GTX460 so I might be able to reach i7 after all?
no


1. if you dont know what to do - dont do it!
the best way to RIP you system is listen russian-spaking man with the pidgin-english  wink
2. dont rape you CPU, overclocking CPU dont give you in SVP much over than on the default, so dont warry about overclock and think about upgrade and donate big_smile