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drummers-lowrise
1) Message boards : Aggie The Pew message board (Message 104749)
Posted 1687 days ago by Profile Andrew Hughes
Could you take pictures of both sides of the PCB with the cooler off? I might be able to help a bit :D
2) Message boards : Project Staging Area : Wall-Sun-Sun: "This implies a bug in the software." (Message 96850)
Posted 1895 days ago by Profile Andrew Hughes
Getting the following using wwwcl.exe with an RX 480 on windows

[2016-07-15 05:27:15 EDT] WALLSUNSUN: received [End Greeting] [2016-07-15 05:27:15 EDT] WALLSUNSUN: closing socket wwwwcl v2.2.5, a GPU program to search for Wieferich and WallSunSun primes Sieve started: (cmdline) 209642090000000000 <= p < 209642100000000000 Fatal Error: Not prime: p = 209642095000000129 c10 = 6286 c11 = 23123. The code must have a bug. Fatal Error: Not prime: p = 209642095001473153 c10 = 19839 c11 = -25000. The code must have a bug. [2016-07-15 05:27:19 EDT] : Could not find completion line in log file [wwww.log]. Assuming user stopped with ^C [2016-07-15 05:27:19 EDT] Total Time: 0:00:05 Total Work Units: 0 Special Results Found: 0 [2016-07-15 05:27:19 EDT] Client shutdown complete
3) Message boards : Aggie The Pew message board (Message 96787)
Posted 1898 days ago by Profile Andrew Hughes
Looks like a bitcoin or similar currency mining farm. I suspect that he did not have to pay for the electricity, otherwise there is no profit anymore.


Wonder why they didn't invest in the usb stuff that's specifically designed for bitcoin mining? Those things run circles around most gpu cards.


ASICs specifically designed for primegrid projects, now wouldn't that be interesting.


I think in one of the threads someone was even asking about something along those lines when that new project came on line and folks were racking up billions of credits in just weeks. Something about it being "unfair" and someone said, well go and design a stick just for PG.


That was bitcoin utopia, it was to mine bitcoins that paid for other BOINC projects - but the amount of money it generates is somewhat low in relation to the clients it supports, but yeah it gave away waaaaaaay too many credits, like 2.5billion/day for a 280x
4) Message boards : Aggie The Pew message board (Message 96786)
Posted 1898 days ago by Profile Andrew Hughes
Yeha it was an altcoin mining setup, btc isn't too profitable for many people to mine right now. Sorry for falling off the radar, but on the bright side I do have a 480! As of now the 4GB models are just re-flashed 8GB models that are gimped, but they can be flashed back to the 8gb models. Unsure of how long this will last. I'm running the vram at 2250/9ghz effective at 120 watts maxish(reported by OS). Once it's stable I'll benchmark it!

I know I need to up the core clock though, but for what I do for work it's working really well right now!
5) Message boards : Aggie The Pew message board (Message 96630)
Posted 1905 days ago by Profile Andrew Hughes
Some of you may like this https://www.chiphell.com/thread-1612953-1-1.html 108 7970s being replaced by 108 1080s!
6) Message boards : Aggie The Pew message board (Message 95431)
Posted 1938 days ago by Profile Andrew Hughes
Only one avx processor here, but I'll also be throwing in a horde or two(and hopefully a phi!)
7) Message boards : Number crunching : Fastest / best CPU for long tasks? (Message 95376)
Posted 1940 days ago by Profile Andrew Hughes


GPU? I don't think those CPUs have integrated video. I suppose you could run linux completely headless but it does make installation a bit trickier.

I got the mobo for $100 on ebay used a while back, it has a video out, just make sure the jumpers are set correctly and it will work. If you want a gpu in it, you'll need to cut the bottom down to fit in PCIe 6 or 4
8) Message boards : Aggie The Pew message board (Message 95344)
Posted 1943 days ago by Profile Andrew Hughes
Central Florida has been putting the heat on, thermometer in the sum hit 120(but it's metal) with the temps hitting as high as 93,lows at 85. I'll turn back on a rig to prime searching for the competition though!
9) Message boards : Number crunching : Fastest / best CPU for long tasks? (Message 95334)
Posted 1944 days ago by Profile Andrew Hughes
That time was with 8 cores. With 2 CPUs and 16 cores, you may see memory contention -- perhaps very significant memory contention -- that you don't see with 8 cores running. Extrapolating from 8 cores to 16 cores might not produce accurate results. Unless, of course, you're also using two motherboards. :)


When I was researching dual socket mobos myself, they generally offer quad channel per CPU, not per mobo. So, the ram performance will scale with the number of CPUs. There might have been some crippled mobos in order to make them fit smaller form factors, but if they have 8 dimm slots, you're probably fine.

Also, on comparing boinc timings, there will be two further unknowns. It doesn't tell you the actual CPU clock, only the nominal. So you don't know if it is overclocked or not for example.

It also doesn't tell you anything about how ram is running. From memory, when I first built my 6700k (running at 4.2 GHz 4 cores), I had some ram stability problems at 3333, so I tried reducing it to 2133. I can't recall the exact speed difference but it was of the magnitude of tens of %.

Bearing in mind the Xeons aren't overclockable, I did work out for our purposes they wouldn't be significantly ram limited providing you use all 4 channels per socket.



All of the dual boards I've seen for e52670s have had 8 slots, 4 per CPU. I am not sure if there is a huge speed increase from having NUMA, although I would hope so.

The tidbit about overclocking is a good point though!
10) Message boards : Aggie The Pew message board (Message 95068)
Posted 1955 days ago by Profile Andrew Hughes
Does the UK have 240v power lines?


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