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QUAD qx9650 @ FSB 450 Mhz is it safe?

A

antonka

Junior Member
Hello,

I was adviced not to overclock my cpu QX 9650 more than 400 FSB due to possible degradation of the cpu. But then I can not use full speed of my memory. Have anyone heard something about issues with qx9650 @ 450 FSB??
 
Things that will degrade CPUs are high voltages and high temperatures. It's recommended to not exceed 1.45V CPU voltage, 1.45V VTT, Temps of 75C full load. You can run your FSB as high as you can but when you reach one of those limits, then best to not go further. I limit myself to 1.40V on CPU voltage and 1.40V on VTT so my Q9450 can last longer.

It is easier to overclock by changing the multipliers, you can keep it at 400MHz FSB and increase the multiplier until you think you hit the max overclock. There's hardly any noticable difference, for example, between 400MHz and 450MHz. People overclock their FSB because they have the locked-multiplier CPUs and can only overclock by increasing the FSB as high as they can. You have QX9650, so you don't need to push the FSB to get high overclock.
 
Hi ShadowFlarex,

Thanks for the tip. But if I stay at 400 FSB I can not run memory @ 1800 Mhz which is actually made for. And @ 450 Mhz system becomes unstable...

I do not have VTT in BIOS. What is VTT exactly??
 
VTT is also known as FSB Termination Voltage, at least on my ASUS Rampage Formula. To calculate the FSB required from the RAM perspective, you should have divided 1800 by 2, not 4. So technically, if you want to run your 1800 DDR3 1:1 to FSB, you'll need 900MHz FSB.

CPU = Quad pumped FSB
DDR = Dual pumped FSB

Can't you use the Memory Divider like on DDR2? Say you have the FSB at 400MHz (1600MHz Quad pumped), you can use 3:4 divider and have the RAM at 533MHz (1066MHz Dual pumped). That's my understanding.
 
I don't have a DDR3 board but dividers do exist for DDR3 as well... so you could definitely run 400mhz fsb and use some divider to get to 900mhz or close to it.

Running your FSB high does not damage your chip. As previously noted it's dependent on temps and voltage.
 
sorry but what cooling do you have for this chip?

4ghz territory is not something you can pull off on a stock heat sink.

 
The only thing you can do to run the memory at 1800MHz is to use the memory divider as I mentioned. If you go to the BIOS, then go to the memory speed option, you can select which speed you want which I think has been pre-calculated with the memory divider against the FSB. This is the only way to run your RAM at 1800MHz with Intel based chipset like your motherboard.
 
Originally posted by: antonka
Hi,

So far my goal is not to overclock CPU. I just want memory to run at 1800 as it meant to.
Click to expand...

you just contridicted yourself then.

you want 450fsb but you dont want to overclock?

 
Hi, Withi that I meant I only want memory to run at spezified 1800 but not overclock the CPU etc. Which FSB to use for 1800? 450 I tried but get blue screens, etc.
 
Originally posted by: antonka
Hi,

So far my goal is not to overclock CPU. I just want memory to run at 1800 as it meant to.
Click to expand...


You have QX but dont want to oc!

You should also want your cpu to run at o/c'ed speed as it meant to
 
Yes of course when I change FSB I change also CPU clock rate but not too much. 3,2 at max... I want to keep my piece
 
Originally posted by: antonka
Yes of course when I change FSB I change also CPU clock rate but not too much. 3,2 at max... I want to keep my piece
Click to expand...

i believe your ram will run at stock settings.

if 1800 is stock settings, then on stock settings it should run at 1800.

However you wont notice jack difference between 1800 and per say 1066.

We learned a long time ago, you want to tighter timings and lower speed. vs faster speed and loser timings.

The point in getting ram like that was in the event if your CPU could go up that high, there would be no wall hitting your overclocking.

I think you impulsively bought b4 researching, and this might bite you in the butt later on

:X
 
Are you using this QX9650 on your Asus P5E3 Deluxe like is says in your signature? If so, I just looked in the manual for that board and it says that you have a "Stepless Frequency Selection" and can choose memory speeds between 800Mhz and 3200Mhz. In the AI Tweaker menu in your bios, change the DRAM Frequency from [Auto] to [Manual] or whatever and see if it lets you just type in the frequncy you want.

...but yeah, why would anyone get a QX9650 and not want to overclock it? ...that's the whole point of the Extreme processor line.

 
Use CPU-z to determine what speed your memory and FSB are actually running at, then post a screenshot here. There is clearly a lot of confusion as to what settings you're using. My guess is your ram is already running close to the speed it's supposed to and you don't realize it is.

It seems you've gone out and spent thousands of dollars on high end components for no real reason other than because you can. A good overclocker can build something for a few hundred dollars that will outperform a stock high end system. That's why these people are frustrated that you said you own this stuff but don't want to overclock it. It's like buying a Ferrari to keep in your living room.
 
Originally posted by: Woody
Use CPU-z to determine what speed your memory and FSB are actually running at, then post a screenshot here. There is clearly a lot of confusion as to what settings you're using. My guess is your ram is already running close to the speed it's supposed to and you don't realize it is.

It seems you've gone out and spent thousands of dollars on high end components for no real reason other than because you can. A good overclocker can build something for a few hundred dollars that will outperform a stock high end system. That's why these people are frustrated that you said you own this stuff but don't want to overclock it. It's like buying a Ferrari to keep in your living room.
Click to expand...

I second that. QX line is for overclocking purposes. And yes, a good overclocker can match a multi-thousand dollars STOCK machine for a fraction of the cost.
Perhaps he wants his QX running with low temp and not stress it. Perhaps the OP built a multi-thousand computer but forgot to get good cooling for the CPU. Have it as you wish. Set FSB to 450 (1800), lower the multi to 7.5 for 3.375GHz, set CPU voltage to about 1.30v, set FSB voltage to 1.4v.
Memory: set to 900 (1800), give it the normal voltage required by the manufacturer for 2 DIMMs. If you're using 4 DIMMs, I think a bit more voltage is due (don't know for sure, I need more for my 790i board). One notch higher.
That's it, you should be stable. Keep checking your temps and stay below 75. I'd stay below 65 for long term use...
 
qx9650 @ 4.05GHz (450x9) | zotac 790i | 4GB mushkin @ 1800 8-8-8-24 | 2 x bfg 9800gx2 q-sli | 2X150gb raptor x raid0 | 2x500gb re2 raid0 | lian-li v2000b / tagan 1.1kw | xonar d2 spdif-out to yamaha rx-v861
Click to expand...

Now that's what the QX9650 is for!! 4GHz on a quad...nice! My wife would leave me if I bought something like that! LOL Can I come to your house to play Crysis?
 
Originally posted by: Woody
qx9650 @ 4.05GHz (450x9) | zotac 790i | 4GB mushkin @ 1800 8-8-8-24 | 2 x bfg 9800gx2 q-sli | 2X150gb raptor x raid0 | 2x500gb re2 raid0 | lian-li v2000b / tagan 1.1kw | xonar d2 spdif-out to yamaha rx-v861
Click to expand...

Now that's what the QX9650 is for!! 4GHz on a quad...nice! My wife would leave me if I bought something like that! LOL Can I come to your house to play Crysis?
Click to expand...

and my 2 girls are chopped liver? 😛

ahh the crysis aspect. He wins.

:T

wait til i grab 2 hd4870X2's. We'll see what tune nvidia sings after that. :T
 
LOL!!!!!

Yes sorry! Didn't see your 4.25GHz sig!

I was actually considering crossfire also now with these new AMD GPUs but unfortunately I need NVidia for some proprietary stuff I run. I'm just not as hardcore when it comes to the desktop since I need to set aside for a new laptop this summer....and a vacation! ;-)

But I do have hardware envy.
 
I dont think this will have anything to do with harming your cpu. You need to look at temps and voltage. Bus speed may effect stability but it isn't going to damage your cpu.
 
Hi,

I am having very unstable system. Here are my settings:

AI Overclock: Manual
CPU Control: Manual
FSB Frequency: 450 MHz
PCIE Frequency: AUTO
DRAM Frequency: DDR3-1800 MHz
DRAM Command Rate: 2T/2N
DRAM Timings Control: Manual
CAS# Latency:___________8
RAS# to CAS# Delay:______8
RAS# Precharge:__________8
RAS# Activate to Precharge:24
DRAM Static Read Control: Disabled
DRAM Dynamic Write Control: Disabled
CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
CPU Voltage:__________Auto
CPU PLL Voltage:_______Auto
DRAM Voltage:_________1.76V
FSB Termination Voltage:_1.40
North Bridge Voltage:____1.52V

Yesterday I had a blue screen again and could only POST after resetting the jumper. Whould appreciate any good advice what to try. Is it still safe to run FSB termination at 1,42?

THanks in advance!
 
450 x ?

what is your multi?

if its 9 or higher maybe its because your going for too much when you dont know how to get there?
 
Originally posted by: antonka
Multi is 7 so CPU runs at 3,16 Mhz
Click to expand...

why did you buy a QX9650 only to have it run at 7x multi?

>.<

Thats like getting a 6 gear manual, and driving it on 2nd gear the entire time.
 
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