the "warm-up" effect

M

MrWizard6600

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I here by designate this The Groos theory of overclocking :D, unless this is old news, which it might be.

So, I've got my sig, and its been pissing me off the whoooollee time when im trying to overclock, I blame the majority of my failures on the crap ass ram, and a small ammount on the instabillity that 680i SPP memory controller might be yielding when using an odd ratio (in my case, 7:4).

So, I'll sum up my first oc experiance, on P21: The thing would NOT post, between 1700 (all numbers are the quad pumped FSB of course), and 1840. It would NOT post between 1870, and 2010. As far as I can tell, 2036 is as high as she goes.

Ok so, after hours of tinkering, I get the thing to post, and a few more hourse of tinkering, I settle on 2012, with ram underclocked :)eek: ... :() to DDR 571, but that might not be enough. It runs orthos for about 5 hours, I turn it off, and come back the following day, and run orthos again. This time, I fell asleep while orthos was running, and I woke up at 10am (~13hrs of orthos), to find my computer on the "failed to post, now running at stock speed, enter BIOS to fix the problem" screen. I do not believe this was due to overheating, I believe its due to the renovations and the constant flipping of switches on the breaker pannel. A clock plugged into the same outlet was blinking 12:00.

So, I turn the thing on again, it fails to post, I try twice more, nothing. So, I set it to the highest known possible post speed, 1850 (I have mem:fsb set to unlinked and at 675, thinking that will provide the closest to 667, but obviosly this changes my 7:4 ratio), and turn it on. It posts, I enter bios, and let it idle there for about ten minutes. When i come back, I change the settings back to the 2012, and DDR571, and it posts! It boots to windows, it runs orthos, I install HL2 and WOW, and it runs both games flawlessly (aside from the inherant instabillity and artifacting of the 8800 drivers).

So, seems to me, that running my sig for a little while, to get it to heat up a little, causes higher overclocks, can anyone confirm anything like this? Why would heat cause anything to change electrically?
 
Why would heat cause anything to change electrically? well it wouldnt. although im not sure what your exact problem is it is fairly safe to say that it is purely coincidence that it would boot after letting it 'warm up' for a while. ive had similar things happen and come to find out later that it is something completely different and unrelated that caused the problem.
 
Heat increases impedance so it definitely affects things electrically.
 
unless your computer was sitting outside all night and is 15 below zero or you had it in an oven, it wouldnt cause what he is talking about. the difference between 20c and 50c doesnt have a noticable impact on electrical conductivity. i was just saying it was most likely some freak coincidence that by doing thing #1 you get result #7, i doubt that it had anything to do with letting it warm up a few minuits
 
its done it 3 times now.

on top of that, i run orthos for 20 mins, nothing happens, when i try to run firefox, its GG (well, this is obviosly software related but you can understand my frustration).
 
no im not. read the 1st post :\

edit: its gotten so bad i've had to change my msn name:
"Highly unstable mobo, Highly unstable ram, Highly stressed CPU, highly unstable program [steam], and highly unstable OS..... :("

I should probibly mention this, as its probibly causing the majority of my problems program problems, ex crashing games: My version of XP is cracked. I talked to several of my computer buddies, none said they could get ahold of one for me, then i talked to my asian computer buddy, so stereotypical but, he got one for me. Made it sound like he had to contact his member of the Yakuza to get it to, lol. It was a crack copy of SP2 but, It wont let me update, but I managed to get .net framework 2.0 update and DX9.0C from third party sources.

I have a copy of windows Vista home premium sitting on top of the computer right now but, I've heard 8800 + Vista = death.
 
Cold boot problems do occur when overclocking. Right now my rig in my sig suffers from it. If my room is too cold in the morning my PC will fail to post first, after that it'll get into a spontaneous reboot loop during XP loading until it warms up enough. Aiming a fan heater at my PC for a few mins makes it turn on properly first time.

I noticed, oddly, that a few times when it had managed to somehow cold boot, my PCI speed was at 53mhz, so it seems in this case it's the PCI lock failing when the PC is cold causing the reboots on loading.

The problem is significantly reduced when I use a lower FSB/HTT whilst keeping the CPU speed the same, i.e. 329x9=2961mhz is much more susceptable to cold boot problems than 296x10=2960mhz.

Hope this info is useful somehow... ;)
 
it would if i wasnt on the E6300.

My LED indicator would lead me to believe its either my memory controller, the Memory bus, or the Ram its self. Since its crappy ram to start with im inclined to believe the latter.

Seems to me someone *ahem phenoix ahem* should make a slow post process which would allow for the computer to warm up a little bit. If cold booting is a real factor, its about time BIOS recognized it so the overclocker might know what the hell was going on, because if you didnt know the problem you might just think your chipset and or your ram had gone crazy.
 
Why would heat cause anything to change electrically? well it wouldnt.
Click to expand...

Not true, for lots of reasons. Most electronics works much better at lower temps. Just ask the guys pouring liquid nitrogen on their CPU's if it helps.

I think you have a combination of things going on right at the edge of stability and its impossible to say exactly what the heck is going on. Doubt it is your software.
 
I didnt mean my crack OS had anything to do with the heat-post issue, just stabillity in windows.

oh yeah, I found ANOTHER problem. One of my ram sticks is (officially) defective. It failed orthos at stock speeds, just asked for an RMA ticket. lets see how long turnaround is with PQI.
 
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