Can I play the big fan game too?  Have you tried the same experiment with just one of the fans? AFAIK the fact that there are 12 shouldnt be that much of an improvement due to teh first fan being the only fan that intakes air - how about thrying it with them paralell instead of in series  I have 15 of these delta 120s - 252CFM - lovely for shifting air BUT too loud for continuos use (unless its in a server room) i have 12 pulling air in my server cab and 3 to 'play' with "Arranging fans in series - stacked on top of each other, so one blows straight into the other - gives no improvement in free-air performance, but doubles the pressure increase in a sealed box, and better and better performance compared to parallel fans as the system resistance gets higher and higher. Incidentally, this means that those goofy monster processor heatsinks with layered low-profile fans are a waste of money, since fans strapped onto a heatsink are very nearly in the free-air situation, and putting two layers of them there does close to nothing to the airflow." SourceSo an array of fans next to each other would move much more air, but the static pressure would be far less (Would fill up the bag quicker, but the bag would be saggy), this is why the bag balloon too a bit to fill up, but then looked like it was about to burst |
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you're right and they are working on that.
Cool! Are they working on the pictures of the 505 units in stock, too ? Can't wait! Oh, I was thinking the 505 units in stock was referring to the 550 unit preorder limit, didn't realize it was actual in stock. Thanks for clearing that up for me. |
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Also, in case anyone is curious
24-core Opteron 6164HE 1.7GHz:
"chainspermin" : 29,
"chainsperday" : 1.67533939,
"primespersec" : 8389,
32-core Opteron 6274 2.2GHz:
"chainspermin" : 12,
"chainsperday" : .71721642,
"primespersec" : 7039,
From PassMark and the opteron wiki page: http://www.cpubenchmark.net/cpu_list.phphttp://en.wikipedia.org/wiki/List_of_AMD_Opteron_microprocessorsDual CPU, 12-core opteron 6164HE's PassMark CPU result: 5351/ea, 5351*2 = 10702 ||| Cache arrangement; L2: 12x 512 KB L3: 2x 6 MB [Dual CPU] AMD Opteron 6274 PassMark CPU result: 10809 (inclusive of both) ||| Cache arrangement; L2: 8x 2MB L3: 2x 8 MB If I had to guess, the dual cpu, 16 core setup (6274's) is slower because it shares one unit of L2 cache between two cores. The HE's have dedicated L2 for every core. Despite the disappointing(?) performance, those are still all nice systems and I would mine on them any day. Looking at the specs on AMD's site, it shows the L2 cache of the 6274 at 1MBx16 http://products.amd.com/en-us/OpteronCPUDetail.aspx?id=760&f1=AMD+Opteron%E2%84%A2+6200+Series+Processor&f2=&f3=Yes&f4=&f5=&f6=G34&f7=B2&f8=32nm&f9=&f10=6400&f11=&http://products.amd.com/en-us/OpteronCPUDetail.aspx?id=649If that were the case then the only thing left would be the L1? |
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Also, in case anyone is curious
24-core Opteron 6164HE 1.7GHz:
"chainspermin" : 29,
"chainsperday" : 1.67533939,
"primespersec" : 8389,
32-core Opteron 6274 2.2GHz:
"chainspermin" : 12,
"chainsperday" : .71721642,
"primespersec" : 7039,
4-core i7-2600k 3.4GHz:
"chainspermin" : 8,
"chainsperday" : 0.57826364,
"primespersec" : 3170,
8-core L5520 2.26GHz:
"chainspermin" : 8,
"chainsperday" : 0.73978522,
"primespersec" : 3628,
8-core L5420 2.5GHz:
"chainspermin" : 14,
"chainsperday" : 0.96020906,
"primespersec" : 3490,
8-core X5355 2.66GHz:
"chainspermin" : 15,
"chainsperday" : 1.00721642,
"primespersec" : 3670,
4-core Xeon 5160 3.0GHz:
"chainspermin" : 7,
"chainsperday" : 0.50713449,
"primespersec" : 1859,
4-core Xeon 5130 2.0GHz
"chainspermin" : 6,
"chainsperday" : 0.34404084,
"primespersec" : 1267,
Core 2 Duo 6300 1.86GHz:
"chainspermin" : 3,
"chainsperday" : 0.15991434,
"primespersec" : 587,
All systems running 64-bit HP9
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So with HP9 on a 24 core 1.7GHz AMD system I was getting 8300PPS, I just upgraded to a 32 Core 2.2GHz set-up and I'm getting 7100PPS, Anyone have experience with 32 core systems? What setting might I need to adjust?
You appear to have uncovered an issue with the miner with high thread counts - I get almost no performance gain when using more than 16 threads on a 32 core system. mikael / sunny any thoughts where this bottleneck might be? Well, as far as I know there are 2 bottlenecks when it comes to scaling out: 1) Block generation. Only 1 thread at a time can be generating new blocks. This was already mostly fixed by Sunny. 2) Memory allocation. The default malloc implementation uses mutexes internally which reduces performance with multiple thread trying to allocate memory. This shouldn't be an issue with my client because I have reduced the amount of memory allocations needed. So as far as the code is concerned there shouldn't really be any bottlenecks. If the caches on the CPU are completely inadequate, some performance issues would start appearing. But as far as I know, most server CPUs have pretty big caches. And of course if you have a VPS, remember that you may be sharing the CPU time with other people's instances. So looking at the specs, the 6100 series opteron has 128kb per core of L1 cache, the 6200 and 6300 have 48kb per core of L1. That's the only difference I can see. I tried running on fewer cores on the 16 core 2.2GHz 6276, but the performance was probably half that of the 12 core 1.7GHz 6164 opteron (Chains per min and chain per day) The PPS is 8300 with the 12-core and 7100 with the faster 16-core |
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So with HP9 on a 24 core 1.7GHz AMD system I was getting 8300PPS, I just upgraded to a 32 Core 2.2GHz set-up and I'm getting 7100PPS, Anyone have experience with 32 core systems? What setting might I need to adjust?
You appear to have uncovered an issue with the miner with high thread counts - I get almost no performance gain when using more than 16 threads on a 32 core system. mikael / sunny any thoughts where this bottleneck might be? I'll try playing iwth the genproclimit=X setting |
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So with HP9 on a 24 core 1.7GHz AMD system I was getting 8300PPS, I just upgraded to a 32 Core 2.2GHz set-up and I'm getting 7100PPS, Anyone have experience with 32 core systems? What setting might I need to adjust?
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I'm about to start renting dedicated servers by the dozen. I think that I found n4ru's special place...
Supposing a GPU miner comes up next week, how could I monetize the servers?
Care to share your settings? |
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Considering selling 1 or more of my preorder units. I have 3 ordered and paid for 8/24/12, also paid for overnight shipping.
Any interest or offers?
Also have 2 in hand if the price were right. Don't have BFL power supplies, but I'd include a desktop PSU.
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Here's my Primecoin set-up. total of 18 Quad core Xeon CPUs
[img ]https://i.imgur.com/KSmyxYKl.jpg[/img]
Is Primecoin CPU only atm? Yup, so I figured, got the cores, might as well use 'em! |
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Here's my Primecoin set-up. total of 18 Quad core Xeon CPUs  |
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Sorry, but this isn't a charity. Even with a geometric increase of 20% difficulty every 2100 blocks (which is practically impossible), this unit will have 77 bitcoins of equity by October 11. As there's no practical way to order an ASIC miner by an October 11th delivery, this offer can't be taken seriously.
Well, clearly they are breaking your door down to buy them at your price.....so knock yourself out. Is this yochdog vouching for you? lol 76BTC |
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Epic!
OP is a douchbag! ssateneth wins!
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Put it around the $50/GH and you will have me interested.
+1 +1 +100 (qty I would buy) |
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Best bet is to get the Gen 4 hybrid asics, they run on unicorn tears
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Excellent, 47 K10's and 14 K20's get bored and lonely evenings and weekends.
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Lots bigger than I expected.
That's what she said. Sorry, I just couldn't let that one go  *groan*  Aaaaaaand that's what she said after |
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Just mined two back to back blocks. Awesome.
Are you running linux? Any particular settings you'd like to share? |
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I think the 7 day rule only applied to the earliest pre-orders. All current orders are queued by date of payment. I don't think your order is even in the queue until you pay.
mm, i think probably i'll cancel the order  i was struggling because i didn't placed the order early but this make my choice easy i will evaluate a purchase when they will release the new miners, having a clear frame about shipping time behaviour and how things will evolve The difficulty increase slows as it grows, think of it this way, for the difficulty to double from the point it's at now, all the asics that are in the wild right now will need to double (plus more to cover the gpus and fpgas) that's a lot of asics. So basically, the difference between getting it week 1 vs week 6, really isn't going to make that big a difference, nothing like week 1 vs week 6 for the avalon batch 1. BFL just announced they plan on being caught up by late september, so if you ordered in May, June, you might get it by September, KNC? October. So pay up, get with the new world order of ASICS, it's awesome over here ;-) |
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