Build Log: 100,000 PPD by 1/23/2011

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Thanks to everyone for the overwhelming support I did expect some interest with my thread but not this much

Most of you are right, my car radiators are HUUUGE! and total overkill. I think i'm going to try and run them both and go with overkill though. I plan on setting up my farm in my unclimate controlled garage in South Florida so I need to be able to deal with high ambient temperatures year round. My goal is 100,000 PPD so thats going to take alot of fire power; even more than I am building now so I need room for future growth in cooling. For 100,000 PPD with only hexacores (for example) that would take around 3,100W - 3,200W in ambient temperatures that can exceed 33c! I think id rather build the WC system once and build extra cooling overhead to meet my goal.

This kind of devotion demands some help.
I just grabbed 3x1 gig of PC3-12800 GSKill to have as spares.
It's your's if you want it.

Thanks for the help! much appreciated

I would lower the QPI multi 1 step .
3780Mhz QPI link is a bit over the top (maybe allows you to lower QPI/VTT)
What's your ram and uncore speed?

Sound advise, after running overnight I went back into bios and checked my settings, my QPI was set at 1.34V! higher than I wanted! I backed off the bclk to 205 which let me drop my QPI to 1.32V, with vdroop i'm hoping the accrual uncore voltage is under 1.3v. The UD3R seems have a bit of vdroop, i'm running at level 1 line calibration (some vdroop.)

Settings are:
Vcore 1.21875v (load voltages are usaly 1.2v but fluctuate down to 1.184v)
QPI 1.32v
uncore multiplier 12x with 6x memory multiplier
Vdimm 1.3v with timings relaxed to 10,10,10,27 or something similar to that

Looks like the farm is shaping up nicely! Here's a tip on cleaning the rads: save yourself alot of time and frustration and take them to a local rad shop...

Good tips on the Rads and Fans. The bigger of the two rads is filthy and beat up and the smaller one has some grease and goo baked on the outside. The fans I got off ebay are cheapo's that a million different sellers are listing (heres one for example http://cgi.ebay.com/ebaymotors/NEW-1...#ht_3646wt_951 I think I bought a pair for ~$50 shipped.)

And once again thanks for posting pictures and a build log of your own Mass-WC'd farm; If I never saw your build log and your amazing collection of hexacores I would have never thought this was possible to do. This is why i'm posting my own build log also; I was inspired by others and shown how its done by the pro's, maybe someone can learn from my build log.

That L5640 is doing really good in 1.2v low-volt action. The chip seams to have more OC-headroom, but the BCLK-wall on MB seams to be limiting it.

Since you have 7 of them, it could be a good idea to see how they can do on a MB with higher BCLK-wall. BCLK240+ would make these chips rock @4.5GHz+, and it would be interesting to see if some MBs can do it.

I'm afraid trying to run these A0's at that sort of Bclk would be hexa-suicide. A B0/B1 L5640 has a turbo multiplier of 19x (vs my A0's 18) and B0/B1's are suppose to be less fragile. To even hit Bclk 210 stable it takes 1.34v QPI, and Bclk 200 needs 1.3v. Bclk of 240+ would take suicidal VTT

If you need any input or help on OCing those chips, watercooling, etc. just shoot me a PM, I'll be more than willing to help in any way I can

Thanks!

This thread is going to cause a substantial increase in PPD for all of XS once we see this finished and can say "oh man he just did that, what's the cost of another 6-core compared to THIS guy?".

Good point; I was so impressed with these L5640's I just ordered another 3. while 7 is a lucky number 10 has a much more even sound to it!

This is a good point actually. I have at least one and I want to say two old (and loud) 40Gig IDE HD's you are welcome to have.

Wow, thanks! I do need some HD's and a 40gig Ide drive is just fine for Boinc!


I'm not sure if these settings are 24/7/365 Boinc Stable yet, but I moved rig #1 off the test bench and set it crunching headless, changed the delta out for a S-Flex.


And here is the headless wattage, a nice even 175w