Check my overclocking maths please!
HI, i'd appreciate someone double-checking this please before i place my order...
I'm going to get:
- P35 motherboard
- Intel Q6600 Core2Quad CPU
- Xigmatek CPU HSF
- 2 Gig of RAM
So the multiplier on the CPU is 9x 266Mhz to give 2.4Ghz at stock.
And i'd typically drop the multiplier to, say, 7? Which gives 1.86Ghz.
And then re-increase the FSB from whatever it is now to something higher. (I think, guessing a bit, this means approx going from 200Mhz to 400Mhz - help please!)
So what RAM do i want? I understand that generally higher the better Mhz, but will 800Mhz RAM be sufficient? Given that it'll be in dual channel, this makes it 1600Mhz. But this is 4x the CPU FSB....
I'm lost.:help:
Re: Check my overclocking maths please!
Up the vcore, set FSB to 400 or 333. Job done.
9 x 400 = 3600 cpu
400 x 2 = 800 ram
or
9 x 333 = 3000 cpu
333 x 2 x 6/5 (divider) = 800 ram
Re: Check my overclocking maths please!
If 3600MHz doesn't work try 3200MHz instead, 8*400.
I had to increase the vcore on my rig to a silly amount (1.58v) to achieve 3600MHz, too hot any noisy for my liking since I fold 24/7 with the machine in my bed room.
Re: Check my overclocking maths please!
As Sim says 800MHz Ram will be plenty fast enough, but please don't move straight toa FSB of 333 or 400MHz, overclocking should be all about small steps, although I expect the CPU will happily manage a FSB of 333MHz. Better to move in small increments so you get a feel for the CPU speed against voltage requirements, unless you are doing particularly CPU intensive tasks 3GHz would be more than enough and lower voltages mean less heat and less electricity being consumed saving you money! Of course you will want to find the limit (who wouldn't!)
Re: Check my overclocking maths please!
Yeah, i'm not going to be happy to increase the voltage particularly - i want simply to have a faster CPU, but without increased heat or reduced life. I'll post back my results when it all comes together, but i havent even ordered the CPU yet... (waiting for a Today Only on Scan, i have asked TheManWhoCan).
Re: Check my overclocking maths please!
Actually what webby says is correct. Unless you bought a 2nd hand Q6600 so you already know how much volts it needs, then you can jump up to 333/400 and tweak from there :)
Re: Check my overclocking maths please!
Quote:
Originally Posted by
MSIC
Yeah, i'm not going to be happy to increase the voltage particularly - i want simply to have a faster CPU, but without increased heat or reduced life. I'll post back my results when it all comes together, but i havent even ordered the CPU yet... (waiting for a Today Only on Scan, i have asked TheManWhoCan).
You will be overclocking your motherboards north bridge anyway if you plan to do what your talking about, so you will be potentially reducing the life of the system and increasing case temps.........and your more likely to replace a CPU then a motherboard.
Might as well overclock the lot. Q6600s will do 3.2GHz without breaking a sweat.
Re: Check my overclocking maths please!
From my overclocking experience on my E6550 (7x multi 333 FSB, 1.28v) I found that i required no voltage increase to get to 2.8GHz then a small bump to get to 3.2GHz (1.30v) and then a fair bit more to get to 3.5GHz (1.33v), it can be pushed to 3.725GHz but that requires a whole load more voltage (1.45v) and that is as high as the FSB will go 532 :)
Re: Check my overclocking maths please!
If your clocking then I would advise having a look at the DFI P35 board as I found mine to be extremely stable even when hitting 333Mhz FSB (no voltage increase needed from me) and then onto 400 Mhz FSB.
Oh and don't forget to turn C1E off or you'll be wondering why the CPU is running at slower speeds which is what I did for about 2 days :)
Re: Check my overclocking maths please!
Quote:
Originally Posted by
shaithis
You will be overclocking your motherboards north bridge anyway if you plan to do what your talking about, so you will be potentially reducing the life of the system and increasing case temps.........and your more likely to replace a CPU then a motherboard.
Might as well overclock the lot. Q6600s will do 3.2GHz without breaking a sweat.
That is not exactly true, a majority of Q6600s will do 3.2GHz but the are chips out there that can't as with all things overclocking your mileage may vary!
Oh and he will only be overclocking the motherboard after pushing past a FSB of 333 before that the motherboard will still be within its standard operating range.
Oh and in case you missed it Intel just announced a $10 price cut on the Q6600 so the price may drop a bit in the not to distant future!
Re: Check my overclocking maths please!
Cheers for the help everyone, you only get one 'thanks' from me per thread though! I've already got a Gigabyte DS3 coming for el cheapo money, but thanks for the DFI advice anyway.
Quote:
Oh and don't forget to turn C1E off or you'll be wondering why the CPU is running at slower speeds
I assume that C1E is some power saving / downclocking measure? If so, i'm quite happy for power saving to come in to play when the CPU isn't active... or do you mean that it's permanently slower, even when i'm thrashing it with video editing?
And yeah, i did also notice the $10 price drop, but i'm not going to quibble over another £5. If i can get a Today Only price i'll be quite happy.
Quote:
You will be overclocking your motherboards north bridge anyway
I know that this will be making various chipset bits and doo-dads running faster, but will they automatically self-increase their own voltage? Because surely if it's simply running faster, but at the same (stock) voltage, then the parts won't get any hotter. Or am i wrong?
Re: Check my overclocking maths please!
Quote:
Originally Posted by
MSIC
I know that this will be making various chipset bits and doo-dads running faster, but will they automatically self-increase their own voltage? Because surely if it's simply running faster, but at the same (stock) voltage, then the parts won't get any hotter. Or am i wrong?
You are wrong. Higher frequency at same voltage => more heat
Re: Check my overclocking maths please!
Oh. Well that's good for me to know then. You've just earnt your second 'thanks' in this '1 thank' thread :)
Re: Check my overclocking maths please!
The Q6600s bootstrap is set to 266MHz, so pushing to 333 WILL overclock the northbridge as it will be running at the more aggressive timings of the 266 bootstrap.
If you inserted a CPU that really did run at 333 FSB, then the northbridge will not be pushed as hard.
I have yet to see a Q6600 that didn't do 3.2GHz (with at-most a tiny voltage increase) out of around a dozen or so. I would suspect most failures to hit that would be from dodgy motherboards/setups/users.
Re: Check my overclocking maths please!
Quote:
Originally Posted by
MSIC
I assume that C1E is some power saving / downclocking measure? If so, i'm quite happy for power saving to come in to play when the CPU isn't active... or do you mean that it's permanently slower, even when i'm thrashing it with video editing?
Yeah speed-stepping - it kept reporting mine in CPU-Z as 1600 Mhz though so I turned it off when clocking and tweaking in order for it to report the correct speeds while I played with the settings.
Re: Check my overclocking maths please!
Quote:
Originally Posted by
Lee @ SCAN
Yeah speed-stepping - it kept reporting mine in CPU-Z as 1600 Mhz though so I turned it off when clocking and tweaking in order for it to report the correct speeds while I played with the settings.
Once i've tweaked and obtained the speeds i want etc, and ran it for a day or so to check, is it ok to re-enable C1E? I want my computer to be fast when i want it fast, and in low-power mode all the rest of the time. I basically leave my PC on 24/7.