HOWTO: Overclock C2Q (Quads) and C2D (Duals) - Guide v1.6.1 - Page 3

Last message on previous page:
yes it is. Well, 375FSB ain't too shabby but I still think there's something you're missing in your settings keeping you from hitting 400. Your temps are good. Make sure you're at least 16-24hr stable at your max settings.

Serenity228, Did you lock your PCI-Express @ 100 and your PCI @ 33.33?

Serenity: lookie what I found: http://www.motherboards.org/review [...] 704_2.html

I just gave it a brief run through. Not sure if it'll help but it's got BIOS screenshots for OCing. That, and I think you should change your memory setup from Sync mode to 1:1 to start things off.

Bustamove: That antec p-180 has a big chimney fan up top towards the back, right? Make sure your exhaust fans (top & back) are running at the same speed or faster than your intake fan(s). You might be creating a dead zone around your CPU with your current fan setup/speeds. There definitely shouldn't be a 10 degree difference with the side off. Usually only 2-3. Corect me if I'm wrong, but you should have a 120mm in the front, one 120 in the back, and a 200mm up top? Also, do you have a fan blowing on your Ultra extreme? I recommend mounting it vertically with the fan on the right side, blowing through it towards the back of the case.

Thanks for this krazynuts. What you are saying makes a lot of sense and did cross my mind 'the dead zone thing''

OK, The fan set up is as follows- 1x 120 at rear of case 1x 120 at top of case, no fan at front of the case, [maybe thats my problem] ill fit one today. there is another 120 fan at the bottom of the case in between the psu and hard drive enclosure. i dont have this one turned on. i have an akasa fan -120mm] mounted on the heatsink. [you said it needs to be on the right hand side] but you also added blowing towards the back of the case? my cpu fan is on the right hand side, but that blows to the front of the case i.e towards the rom drives.

i do have a bit of an issue with wiring, there is a problem with a 'spagetthi like lump at the bottom of the motherboard, i realize this could be affecting air flow. the problem is [i think] there is a panel that sits above my psu that seperates it from the main interior of the case, all my sata ports sit just above it where the mass of wires are, dont know how i can change that if at all.

You have given me something i can work on, oh btw can you tell me if my cpu fan is sitting on the correct side of the heatsink? [heatsink is vertical as you said] first thing i need to do is put a fan in the front panel of the case, there is a housing for one, but none present, thus no intake fan right? meaning two exhaust fans, top and back but no intake?, ill do that first then work from there.

thanks again for the advice, its very helpfull. now i know where to start.

@krazynuts.
Thanks for the advice, i feel like i just went a few rounds with mike tyson doing this! i think my head is about to pop but.. i think im there. heres what i did, between my two year old son picking bits up and running off with them! [nightmare]

ok, i turned the heatsink fan around like you said, no difference at all.
so i removed the heatsink, cleaned off the as5 then reapplied new paste put it all back together. [incidently, anyone who has a thermalright extreme, how lame is that wire clip arrangement to hold the fan on!, man i nearly lost it with that completely. anyway by what must have been a minor miracle i got the thing back on. then... no difference. by now i think i wanted to cry.
ok so all my efforts thus far resulted in zero difference. there was no way i was giving up so i put a fan in the front of the case [120mm] problem was though it was about 100mm out of paralel with the heatsink if that makes sense, so was blowing air direct under the heatsink by about 60 or 70 mm. above it are my dvd drive bays. i got a small fan and wedged it in an empty drive bay just above it and had it blowing directly towards the heatsink fan.
then i had the other fan in the psu / hd compartment which just would not come on at all. so out it came, i got another akasa 120mm fan and wedged it in with some foam padding. it fired up np.

so my cpu is clocked to 3.08 now
[280x11]
core volt 1.35
temps are reading at idle.

core0-42
core1-42
core2-38
core3-38

at full load the max it is reading in core temp is 64 64 60 60. i ran tat to get these readings.
this is with the side panel on, for a qx6700 i think this is ok, i did run occt for 30mins on full load. it crashes, but its not because of high temps. im not sure if its a voltage thing with my cpu [needs to go up] or mem timings.
memory timings are something i havent got my head around.

well the inside of my case looks like beirut on a bad day, but the temps are down. the case doesnt have a window so what do i care.
if you have any more advice for me that would be great krazynutz you helped out a lot allready, i appreciate it.

just ran occt for 30 mins after upping the voltage to 1.375. stable. next i need to run orthos.

Krazynutz, should i run the one brand mem in dual or single channel mode? both sets of ram are cas4

shall i remove the gskills or the corsair? or doesnt it matter?

no difference, in fact if anything the temps went up slightly. i tried both configurations.
i have a question, if i set the bios to stock settings, then raised the multiplier to 12 and left all other settings as they are, [except maybe speedstep] that would theoretically give me a 3.2ghz clock right? is this likely to raise my temps again?
or maybe a similar sum that would =3.00ghz with a x12 multiplier? that would of course be an initial underclock i think. am i way off base here?

Serenity:

1: did you set your ram to be 1:1 in the bios and your voltage is 2.0-2.1??

2: If so, just for giggles, set your ram timings to 5-5-5-15 and see if it takes you any further. You shouldn't have to, but maybe you have some weak ram.

3: have you updated to the latest BIOS version?

Ok, in CPU-Z under the memory tab, if you have PC2-6400 ram, should the frequency say 400MHz or 800MHz? Cause even when i run my CPU at 1333FSB, and set my memory to 1:1 in bios, Witch sets my ram frequency to 1333, my comp wont even load (make it to post).

I could have swore that with DDR memory the effective speed is double the core speed (witch is what CPU-Z displays).

My bios runs differently. It rates the CPU FSB in quad pump format, and my ram is displayed in normal manner. So when i run it in 1:1 mode its essentially matching the ram DDR score with my Quad Pump score of my CPU, witch would be running the ram at double what it should be. For instance, when i have my Ram set in Sync mode with a 1333 FSB it makes the ram score 667, and when i get to Windows i run CPU-Z and under the memory tab it shows the Frequency as 333 (witch u double cause of DDR, witch equals 667) and says my FSB : DRAM ratio is 1:1. If i were to set my bios to 1:1 instead of sync and made it into windows CPU-Z would display my ram core speed at 667, witch u double cause of DDR so 1333, and i dont think my ram can handle that much of an overclock. Hence why i cant even make it to post when my CPU quadump is set to 1333 (its default) and make my memory 1:1.

So im woundering if i may have gotten a bad CPU or maybe my mobo has a bad socket? I cant make it to 1600 FSB with out it crashing, and i have run my ram with a core frequency of 400, doubled cause of DDR (800), before and it has performed fine. But for some reason i cant run my CPU FSB at 1600 with my ram at 800MHz (400MHz core freq), even with my vcore voltage at 1.4v and my ram at 2.2v (says u should only do 2v). What are some possibillities? And thnks so much Krazy for trying to help me out i really apreciate it, u have no idea, im just so frustrated that i cant figure out whats wrong. Could it have something to do with the mobo chipset drivers (i have 680i installed now, i think my chipset is suposed to work with 650i too)? Could it be a bad CPU? Maybe a bad Mobo socket? a bad PSU? or bad MEM? any other things that u could thik of?

Thnks again so much! I guess im just screwed lol.

Ok, i got my machine to start with 1600MHz fsb, and 800MHz ram. My temps idle at like 40c-43c ish, and my full load is like 62c. Are those temps too high for my machine?

I had to set my voltages up kinda high, also i lowered the LDT from x5 to x4 (im not sure if this did anything but it was like the only thing i never changed lol, so i was like hmm why not) Can u explain LDT multiplier is? I also raised my PCIEx16 slots to 115 MHz (dont know if this effects it either). I really wish i could get these voltages down lower. My Vcore is ~ 1.51825v in bios (Speedfan is saying its 1.42v), my Memory ~2.2v, HT 1.4v, NB 1.5v, SB 1.55v, VTT 1.45v.

Also another quick question, could there be a common reason why my core0, and my core1 are different temps. My core0 is like 3c-6c lower then my core1. I may give lapping a try, but im just scared ill screw something up.

MAn i dont get this MOBO! I set it down from 1600MHz to 1550MHz. I was able to drop my Temps to about 35c idle, and 50c on full load. Man this board is suposed to be good, but the only catch is all the good OC reviews said that you have to be patient. They say this mobo is very hard to get right, the voltages are tough to figure out. I agree with that lol. Man how does 1600MHz take .3v more than 1550MHz? You got me. Maybe i just suck at OCing. I dont think i could possibly do anymore in terms of air cooling. I mean i have 2 120mm intake fans upfront, a 120mm exhaust fan in back, a 200mm exhaust fan on top, and a Tuniq Tower 120mm HS. Oh well i give up, Im gunna have to deal with 3.1Ghz

My Voltages are:

Vcore: less than 1.28v
Memory: 2.0v
HT: 1.2v
NB: 1.4v
SB: 1.5v
VTT: 1.35v

SORRY ABOUT THE DOUBLE POST THIS SITE KIND OF LAGG AT NIGHT LOL

Have you tried 8x400 for 3.2Ghz? Does the Q6700 do wacky things when the multiplier is changed? For instance, when I change my multiplier, the only thing that sees the CPU speed correctly is CPU-Z. Everything else sees it running at anything from 2.66Ghz all the way up to 12.42Ghz! Pretty funny stuff. Check out this thread of mine:

http://www.tomshardware.com/forum/ [...] -wackiness

Tried it, occt crashed after 5 seconds under load, but temps were only at 56 at the hottest core, could there be some other setting that needed to be changed? i left everything else as it was.

Could my graphic card or psu be an issue?
but i think more likely is my heatsink not tight enough on the cpu. i turns real easy, almost like it slides around. i dont have to put hardly any pressure on it to move it, i need to put the washer in there to see how that is. take a look at this and let me know what you think?

http://www.exoid.com/?page_id=94

i reckon its gonna help my temps for sure, along with lapping the hs, temps should drop about 5 degrees i reckon.

the thing that is puzzling me though is that even as it stands, its not even reaching its max intel recs before i get errors in stress tests? and correct me if im wrong but intel are giving conservative max temps are they not? most ppl say you can add 5 degs to that making 70 the point where things start to get overheated?

however it does seem quite happy at 9x333=3.01ghz im gonna run prime overnight at that and see what happens.

15 dollars is a great deal! i just paid £45.00 [90dollars] for my ultra extreme] and its an ice skater!

dude get me one, they wont post to uk! wwhhaaa! looks good, they even say its compatible with qx! meaning its been tested.

i could try one of those. does it have a back plate set up?

btw, i ran prime overnight at 9x333, everything was ok, no errors, but my temps sat at 65,65,62,62. that looks like just about a safe limit with my current cooling issue [prelapping and the washer mod] but would like to see it cooler, so to push it higher.

the advice you gave re air flow seems to have helped a lot, i can even hear the difference.

can someone please tell me how 2 turn off cool and quiet

Oh yeah, ouch! me too, that would be a disaster. dont bear thinking about.

btw, i did the washer mod, its tighter, but no real difference in temps yet, maybe needs to settle in.
ive had it on and off so many times it aint had a chance!

ill give it a few days then try lapping the hs, im still at 3ghz and all stable at 3ghz in prime. the pc is performing like a rocket engine!

i.e i can move a 100mb file from one drive to another, no status bar at all! it just sends it complete instantly, never seen that before.

btw, im after a gtx8800, know of any good prices over there? cheapest i can find here is about 600 usd. [£300 ish]

hows your overclock doing?

Good to see your temps have dropped. thats a big drop too.

I was just checking out your hardware config, very similar to mine id say, do you think your psu is big enough to handle the power your needing? i have the 550 version of the neo, im thinking maybe i need something bigger, especially when my new gc arrives.

thnx for the links by the way, i got one here for 300 pounds inc tax and postage.

here.. http://www.overclockers.co.uk/show [...] =GX-051-OK

prolly would work out about the same after postage etc. it was the cheapest i could find this side of the water and ocuk do good stuff.

I tried clocking mine to 3.2 again today but it gets errors after 20 mins in stress tests, so i dropped it back down to 3ghz.

i was wondering, do you have that little qfan thing on your board? i was reading something on the asus forum, a guy put up an oc guide similar to greyskys here, almost identical! but he said he has the qfan blowing at his h/s too. I might try it, i never bothered with the qfan before, but who knows ...i just thought it might mess up air flow again?

i still didnt lap my hs yet, i might get around to it this week sometime. maybe i just need to settle for 3ghz on this chip with air.

Great Post,
Thanks for all the infos, i just put together a new rig and was reading up on overclocking before i purchased it ( as this is my first Intel system ).
So after i put her together i played with it for few days at stock everything, then went ahead and raised my fsb to 400, set ram to 1:1 and that was it - 3.2 easy and stable . Running prime95 small test as i type this, with other programs running, (3DSMax, media player, bit torrent, anti virus, coretemp). Core temp reports 36c - 37c for each core. I would clock it higher, but don't need to, running cool and faaast. I'm loving this rig so far.

Under 1000 bucks

abit Ip35 - E ( great budget board so far, i recommend)
C2D e6750 @ 3.2 (8 x 400 = 1600 fsb)
Zalman 9500 HS (i chimped to save 15 bucks maybe shoulda just got the 9700 but meh...)
Crucial Ballistix pc2 6400 1:1 timmings 4-4-4-12-24
Ati x1650 (soon to be 8800 gtx or better, this may raise temps a bit)
Samsung SATA 3.0 500gb
Sony Optiarc SATA 3.0 18x DVD Writer
Mushkin 650 PSU
Cheapo 49.00$ NZXT Trinity ( i just like this case, looks great, functionality is good enough for me)
2 x 120mm case fans (1 intake in front , 1 exhaust out back)

Prime still running , Temps at 36c - 36c

Im thinking the same, but he is running a core2. still seems very low temps with all that stuff running.

Id have to sit in a refrigerator to get those temps!

btw krazynutz, room temp has dropped here too, i have 42,42,37,37 at idle now,[higher than probots at full load!] for me thats good. still didnt try the little q fan yet, i got my new g/c coming 2morrow, those temps gonna go up again im sure.......ill put on the qfan at the same time, worth a try..

probots zalman 9500 is a good h/s i had that on mine b4 the ultra extreme, didnt make that much difference really. needs lapping though, i started waving back at it!

.

At idle with speedstep it sits at 12c - 17c Wow! are you living in an icecube!! lol.

quote;I really wanted to get the ultra-120 but i got the zalman purley out of ease of instalation, by roomate built his rig a week before with the stock Intel HS and i watched him bend his mobo pratically in half trying to get that piece of crap on, the zalman was so easy to install, easiest HS install i ever did.[/quotemsg]

the u extreme is similar to fit to the 9500, just has a crazy, wire clip thing going on for the fan installation, bit of a nightmare,

your roomates woes with stock hsfans sounds very familiar, i have an out of shape board to testify, abit aw8max. still works though..

Cnt believe those temps you have! lucky you!

@krazynutz, check this out, does this add up?

http://www.theinquirer.net/default.aspx?article=37465

Yeah i tried it, but i think im doing something wrong, i set multiplier and cpu to the values he gives but im not sure about fsb, i thought that automatically changed?
thats why i asked does it add up, 8x333 for example gives you way under 3.3 oc, now its the fsb setting im missing here.

did you notice he has the same mixed ram i have 'gskill'and çorsair'but his cpu is a xeon right?

btw my gc came today, my psu cant handle the extra watts needed so i have to get a new psu. man it never ends!

whenever i try to run a video app, i crash to a blue screen. its dfo the psu.

i tried clocking mine to 10x333 earlier with 1.375 cpu voltage. it ran great, but i cant run a benchmark app cos of my card.

that qfan didnt change my temps either.
i have an abit aw9d max board in another pc, im thinking about trying it with the quad. dont think it will be as good as the asus though, im just thinking about my temps. maybe it will help.