Posts by ka4iqd
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Message boards :
Number crunching :
Computer freezes when using boinc... why?
(Message 814714)
Posted 4 Oct 2008 by  ka4iqd
Post: You have probably already fixed the problem since this thread is about two weeks old now but I was out of town and just now seeing it. One thing you can always try if a previously stable computer starts crashing is to get a can of compressed air and blow the dust out of all your fans and heatsinks. I overclock right to the edge of stability, using prime95 for stress testing, and I have to blow the dust out of my cpu heatsinks every couple of months or so or I'll start getting crashes from overheating. |
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Message boards :
Number crunching :
Overclocking newbie to Q6700 to 3.2Ghz and a ASUS P5K-VM Mobo
(Message 807923)
Posted 14 Sep 2008 by ka4iqd
Post:
I think this may have been in response to my suggestion of putting a different fan on your cpu cooler. If so, I didn't say to replace the cooler, just the fan, as I saw your previous post stating the size problem. Also, not a bigger fan, just a more powerful one. I'm not familiar with your cooler but many of them have replaceable fans so you could replace it with one the same size, just with a stronger motor. Someone more familiar with your cooler may be able to tell you if that's possible. It's been my experience that all but the top coolers, meaning the most expensive as well, use way underpowered fans so that's one of the first things I look at changing. edit: typo |
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Message boards :
Number crunching :
Overclocking newbie to Q6700 to 3.2Ghz and a ASUS P5K-VM Mobo
(Message 806813)
Posted 10 Sep 2008 by ka4iqd
Post: Addem note: While running SSSE3 at 55C at 400x8 and 1.45V (average 1.384V load), I don't get a multiplier drop but when I run Prime95 at 55C at 400x8 and 1.45V (actually 1.368v load), I get a multiplier drop (even during the test now). If the processor is slowing down during use it sounds like a heating problem, typically power supply problems would cause a reboot. I don't recall if you said what setting you are using in prime95 but if it's small ffts, the top check box, it can overheat quite rapidly. At least on my two q6600s and my qx9650. An inexpensive fix you might try is replacing your case fans and cpu cooler fan, if it's replaceable, with higher cfm fans. Most case fans are very underpowered for noise concerns and the same goes for most cheaper cpu coolers as well. I bought a bunch of 110 cfm, cubic feet per minute, fans from newegg when I was putting these together for less than $10 each. For comparison, many of the stock fans are under 35 cfm and quite a few are even under 25 cfm. As an example, replacing the two case fans and cpu cooler fan on one of the q6600s cooled the system temp over ten degrees c and the cpu by 3-4 degrees c. Even if you end up buying a new power supply the additional cooling is cheap and can extend the life of all your computer parts. In answer to your post directly above this one, your power supply would probably be sufficient depending on what else is in your system. I don't recall if you said what all is in it. One of my q6600s has a 550w and the other either a 600w or a 650w. I don't recall for sure which is in which one but I THINK the 550w is in one that is overclocked to 3284 mhz at 1.280v, under load, the motherboard is set to auto-configure the voltage when overclocking and I've had no need to try any higher manual settings on the cpu although I did have to bump up the ram voltages a bit. I did try to lower the voltage on the cpu a little because my other one, see below, is running lower but it became unstable. This system has an 8600gt video card and a tv card. The other is running at 3105 mhz and 1.216v, again the motherboard set the voltage on the cpu and it works fine, 24 hours on prime95, so I left it but also had to bump up the ram a couple of steps. This system has an 8800gt. Otherwise both are about the same, 2gb corsair ram, single 500gb hard drives, two dvd drives, onboard sound and lan. At the moment heat is the limiting factor on both of them, any increase is clock speed starts overheating. Although I run both of them about 200mhz faster in the winter when the air temp in this room is about 10-12 degrees c cooler just bumping up the clock speed a little, voltages stay the same. So unless you are trying to cram a lot more drives or dual video cards you are -probably- ok. As to modular for cooling concerns, just keep the unused cables out of the air path and they won't make any difference. Most of the computers I've built either had enough room to stuff extra cables right above the power supply or over top of the optical drives without blocking air flow. Careful cable routing and using ties or cable wrap to keep everything bundled is always a good bet in any case. Steve ka4iqd |
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Message boards :
Team Recruitment Center :
Carl Sagan
(Message 782023)
Posted 13 Jul 2008 by ka4iqd
Post: I'm fairly recent to the team having joined just a very few months ago. Some really nice people. Friendly and helpful, a pleasure to be associated with this team. And what could be better than to seti in the memory of Carl Sagan? Check us out, look over the forums, ask anyone any questions you may have. Hi Guys! <waves> |
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Message boards :
Number crunching :
Declining RAC
(Message 779542)
Posted 6 Jul 2008 by ka4iqd
Post: On all of my SETI dedicated rigs, the RAC is declining slowly since the last scheduled down time or so. Each so far has declined 150 to 500ish, except one that is a few weeks old, dennis3c, still going up. My pending has raised a few K but I do not know if that is enough to off set the decline. Is this my problem or others doing the same? Thank you for any answers in advance. Hope you are all having a grand 4th of July weekend. I've been watching a steady decline in my rac since June 17th and wondering what is going on too. I have three different computers that all started downhill in the same 24 hour period. My combined rac was to almost 21,000 that day and since have been dropping steadily and was at about 18,500 just a little bit ago and the graph is still nose diving. No changes have been made in the apps, the computer usage, hardware, or the overclocking on any of the three computers. I've been hoping it was just normal ups and downs but there have been no ups in that time. Maybe tomorrow. :-) |
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