Posts by BMH

21) Message boards : Number crunching : Will 4x pci slot effect cuda crunching (Message 1136647)
Posted 6 Aug 2011 by Profile BMH
Also, regular dust clearing from the heatsink of that bottom card in particular may be in order with it being sat in the bottom of your case. Once heasinks become clogged temperatures quickly rise.
22) Message boards : Number crunching : Please help building my new main cruncher (Message 1136646)
Posted 6 Aug 2011 by Profile BMH
I advise that you get PC3 1333 RAM (or PC3 1600 if you want some overclocking headroom)... and a higher wattage PSU (800W min.) - one with 4 x 6-pin PCI express connectors (the graphics cards require two each).

The HAF is a nice cace and should be up to the task I think. When you come to build, make sure the side panel has a fan fitted to blow air in towards your two graphics cards.
23) Message boards : Number crunching : GTX 560ti Users: Information Needed (Message 1135902)
Posted 4 Aug 2011 by Profile BMH
1.Corsair HX 850W ATX Modular SLI Compliant Power Supply 70amps on 1 x 12v rail
Q9550, Win 7 64 bit SP1, 4GB Cosair defender ram. ASUS P5Q-E mobo
One MSI Twin Frozr 560Ti
2. 0.38
3.Yes. Don't run Seti cuda all the time. Sometimes once or twice in 8 hours drops core to 405MHz. Have looked at error message Boinc say computing error.

Errors can happen when PC is running without other use.
Seem to start with .38 + 27X.xx drivers
Have MSI Afterburner installed with above profiles.

I am also using a MSI Twin Frozr 560Ti, with no downclocking issues (unless I overclock). The only difference (besides not using MSI Afterburner) really is I'm using nvidia 270.61 drivers, so you might want to try that instead?
24) Message boards : Number crunching : Comparing WUs to wingman (Message 1135474)
Posted 3 Aug 2011 by Profile BMH
I thought the 260s could only practiacally crunch 1 WU at a time. That's what I have mine doing and the 460s and 560tis do 2 WUs at a time (some people have them doing 3 but I'm not certain there is any benefit).
25) Message boards : Number crunching : Please help building my new main cruncher (Message 1135472)
Posted 3 Aug 2011 by Profile BMH
You do realize that the Sandy Bridge motherboards have a lot less PCIE lanes so that you can't use as many video cards as you could with say an i7 970.

Just a thought.

The motherboard for my next build has three PCI Express slots - it did did take some searching to find. The first two slots are 16x and the third, provided by a separate chip, is 8x. I've not tried crunching yet with three graphics cards.

However I have heard of some people experiencing problems with using four graphics cards, especially dual-chip cards like the 290s.

"Dual channel" and (I assume) "triple channel" is marketing-speak for two (three)physically and electrically identical modules. There's no need to buy "special" dual/triple channel modules as long as the ones you get are identical (i.e., same model/part number).

It is recommended that you buy the matching RAM as a kit. Sometimes RAM of different makes and speeds will work OK together (they'll all run at the frequencies of the slowest module), other times you may run into problems. I've had problems with seemingly identical RAM modules that were purchased individually.
26) Message boards : Number crunching : Time to get sorted out, Seti@home (Message 1135234)
Posted 2 Aug 2011 by Profile BMH
Have you considered that you're likely overreacting? We're currently in our 3 day outage window and before your post, things were working just fine. As of the time of this post, we've been without new tasks for around 16 hours, don't panic.

I had been pretty much without work on my main rigs before this outage. But I do agree, don't panic.

What most north Americans don't consider is how their decisions affect us this side of the pond.
Since I retired, to keep costs reasonable, and to relieve some of the stress on Seti, I now only crunch when I am up and about. Approx 16 to 18 hrs a day...

I really think it's down to luck. Two of my rigs are only on during the day too for the same number of hours as yours but haven't been without work since I set them up a month ago.
27) Message boards : Number crunching : Please help building my new main cruncher (Message 1135228)
Posted 2 Aug 2011 by Profile BMH
I too would recommend the skt.1155 "sandybridge" CPUs, either 2500K (4 cores/4 threads) or 2600K (4 cores/8 threads), and suitable motherboard.

PC3-1333 Dual Channel RAM is recommended.

I'm using an 800W 80plus rated PSU to power my two GTX 260 ti's, but I only have one hard drive and minimal other things so it might be cutting it fine - these cards do seem to be a bit particular when it comes to power/heat/stability, so more is probably better.

The MSI Twin Frozr II is a good card with good reviews, I have one. Good case airflow is key, especially with two cards installed. It is recommended that the CPUs stock cooler is replaced with maybe a 'tower' cooler with 92mm/120mm fan - it will not only keep the CPU cooler but keep things a bit quieter.

Maybe consider a SSD for your OS drive and applications, for quick bootup and loading times and improved responsiveness.
28) Message boards : Number crunching : GTX 560ti Users: Information Needed (Message 1134958)
Posted 1 Aug 2011 by Profile BMH
Because the stock frequencies of the 560ti aren't that much above those of the 460 (while the latter has fewer cores - I read 7% in computer magazine I read), manufacturers feel a greater need to play with the clock speeds to tempt consumers with OCd versions, and on top of thise maybe these cards are just a bit more sensitve when overclocked/what voltages are set at or the manufacturers aren't getting the settings quite right... and when you run a GPU, like a CPU, at full load, as when crunching for SETI, those frequencies and voltages have to be just right for things to remain stable.

Fluctuations elsewhere in the system, such as in the power from the PSU can easily prevent an overclock from being stable, and manufacturers of GPUs don't know what our PSUs are like - so personally I don't like pre-overclocked GPUs... but I like the ones with decent coolers and it seem you can't have the latter without the former.

We don't get pre-overclocked CPUs so it annoys me a little that the market is flooded with pre-overclocked GPUs, just to persuade consumers.
29) Message boards : Number crunching : Goodbye (Message 1134579)
Posted 31 Jul 2011 by Profile BMH
JPM, you can still crunch. The idea behind S@H was to use spare cycles. That means running in the background when your computer is on but idle. For example when you go grab lunch or a cup of coffee. If you use the program as originally envisioned then you can still crunch and only burn the electricity that your computer will burn anyway.

I don't think it works like that any more. As soon as your computer becomes idle and BOINC starts crunching, it's going to use 100% of the CPU by default... in all honesty, if you wanted to save electricity you'd be better off letting a computer go to sleep or better still shut it down.
30) Message boards : Number crunching : Goodbye (Message 1134146)
Posted 30 Jul 2011 by Profile BMH
Regarding those that are struggling for WUs... I have two boxes that are only on for 12-15 hrs a day that haven't been out of work for over a month when I set them up, compared to a couple of others that are on 24/7 that are struggling to keep the 'hoppers full'. I can't understand the logic - some machines just seem to go through rough patches.
31) Message boards : Number crunching : Windows upgrade question.... (Message 1134144)
Posted 30 Jul 2011 by Profile BMH
I much prefer clean installs rather than upgrades which in my experience often turn out to be buggy or run less efficiently.
32) Message boards : Number crunching : Help with my laptop? (Message 1134142)
Posted 30 Jul 2011 by Profile BMH
Just press and hold the power button for a few seconds will generally force the system to power down, even if frozen.
33) Message boards : Number crunching : Tansferring WU to new machine? (Message 1133068)
Posted 28 Jul 2011 by Profile BMH
What's the best way, very specifically, to transfer un-crunched WU from one machine to another?

You can transfer the identity of a machine to a different machine, including un-crunched work.

If you have a slow machine with tons of work, and a fast machine that is empty, you could actually swap identities.

What you can't do is take some work on machine "A" and give it to machine "B."

One form of widespread cheating in SETI Classic was to have one machine download work, crunch it on multiple machines offline, and then give it back to the original machine to return -- making that original machine seem mind-bogglingly fast.

I used to do this, not to cheat but because machine "A" (at work) had internet access and machine "B" (at home) didn't. I never realised it was considered cheating or that anyone was looking at the performance of machine "A".
34) Message boards : Number crunching : Help with my laptop? (Message 1132960)
Posted 28 Jul 2011 by Profile BMH
One thing to try is, remove the mains power lead, remove the battery and then remove the CMOS battery for a minute.

If that works then you'll need to enter the BIOS and set the date/time and maybe a couple of other things.

If that doesn't work it may be faulty RAM or a fried CPU. With the first you can try one module at a time if there are two, as a process of elimination.
35) Message boards : Number crunching : Question: about Imac (Message 1132270)
Posted 26 Jul 2011 by Profile BMH
yes it is the monitors. Imac has a different setup in pixels...don`t remember what it is , but my professor explained it to me because I brought the subject up to him also.

Possibly a higher dpi and more accurate colour representation by default? Especially with the latter compared to all the PC screen variations. Not to say it's not possible to have a PC with good visuals, but you have to choose your components wisely and maybe do some calibration if such things are important to you.
36) Message boards : Number crunching : credits and workunits: a fair system needed for Boinc (Message 1132262)
Posted 26 Jul 2011 by Profile BMH
I've been a SETI@home participant since '99 but I did stray away for a while while I participated in a non-BOINC-based project. I recently directed my computers back to the SETI because of an issue I had with the points system with the other project which I felt was not beneficial to the science.

For me I enjoy setting myself little targets and comparing participants and computers with similar RAC. I like how we can all offer tips and advice and help out when people run into problems, while at the same time essentially competing against each other.
37) Message boards : Number crunching : SNMP Monitoring of GPU? (Message 1131766)
Posted 25 Jul 2011 by Profile BMH
How remote are you?

GPU-Z has a 'log to file' option - you can set it to log to a shared directory.
38) Message boards : Number crunching : I hate those guys :-) (Message 1131757)
Posted 25 Jul 2011 by Profile BMH
Just wondering, can you be your own wingman if you have more than one computer?

I guess it's not really optional but more theoretically possible?
39) Message boards : Number crunching : So What Happened?? (Message 1130935)
Posted 23 Jul 2011 by Profile BMH
Following the weekly outage, the new work-experience kid was asked to go and switch everything back on, but was faced with the following POST message:

No keyboard present...
Press F1 to resume
40) Message boards : Number crunching : Welcome to the 12 year club (Message 1129299)
Posted 18 Jul 2011 by Profile BMH
I just sent my original SETI cruncher off to be recycled :(

An AMD K6-2 368Mhz with 128MB RAM and a huge 10GB hard drive. Still in full working order but just taking up space.

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SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.