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High Tech Chat » Awesome CPU Heatsink The Prolimatech Megahalems
On 09/02/2009 at 16h20

Photon

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Repost of the preceding message

I'm getting something like that with my two Q6600.

The first clorcked to 3.2 GHz work with an 9800GX2 to feed et get something between 4300 and 5500 PPD depending on the WU on the GPUs with a native Linux (Ubuntu 9.04 kernel 2.6.28.15).

Te second Q6600 working @ 3Ghz have 2 9800GX2 to feed and get something between 3700 and 4500 PPD with the same OS.

The first one is on P45 with DDR2 800 (MSI P45 neo 3FR which is very capricious with memory).

The second one is on a X48 with DDR3 1333.

Both are folding all four core on one SMP client.

So it seems that these phenom II are pretty good folders. :top

   
On 09/02/2009 at 16h38

Quark

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MtM:
Weedacres:
I also run a Q6600 at 3024mhz with 2 gpu's. It averages about 4800ppd with notfreds, but it runs at 64c. I was having trouble with it overheating until I stuffed another 120mm fan in the front of the case blowing directly on the Ultra 120 heat sink.


Tell me your secret? Q6600 3g, notfred, four cores, 8gb ram ( allocated default amount to the appliance ) and I'm getting an average of about 3.5k.

Or... you're running two vm's instead of one????????????????????????????????????????????????????????

Might be worth mentioing you're not following recommodations when saying you get X ppd ( or well I mean you should mention the client setup ).


Sorry, I was trying to point out the temperature difference with the subject heatsink.

The Q6600 on an Abit IP35 Pro, with 2x2g of Mushkin PC2-6400 at 400mhz. The Q6600 is running 3024mhz, 9x336 @ 1.2v. Running XP32 with VMware Workstation running notfreds with 4 cores, not 2x2 cores with the default memory allocation.
It's no real secret, there are several threads on the fah forum on this. Here's one of them:

http://foldingforum.org/viewtopic.php?f=52&t=10629

I use Process Lasso to manage priorities and affinity, with vmware-vmx.exe set to idle and my gpu's set to real time. You might check to see if there is some other application using a lot of your cycles and that its actually using all 4 cores and not maybe 3. Lasso shows vmware-vmx.exe averaging 90.69% cpu utilization on all 4 cores.

   
On 09/02/2009 at 18h05

Photon

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Temps are strange for the Q6600.

Are you using a B3 or a G0 stepping for the Q6600 ?

Because with the same clock or so I have much more cool temp.

Stock vcore ?

   
On 09/02/2009 at 20h19

Quark

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Messages: 46
MtM:
Weedacres:
I also run a Q6600 at 3024mhz with 2 gpu's. It averages about 4800ppd with notfreds, but it runs at 64c. I was having trouble with it overheating until I stuffed another 120mm fan in the front of the case blowing directly on the Ultra 120 heat sink.


Tell me your secret? Q6600 3g, notfred, four cores, 8gb ram ( allocated default amount to the appliance ) and I'm getting an average of about 3.5k.

Or... you're running two vm's instead of one????????????????????????????????????????????????????????

Might be worth mentioing you're not following recommodations when saying you get X ppd ( or well I mean you should mention the client setup ).


Somehow my response MtM's post disappeared. :s I'll try again. edit: Oops there it is.

Sorry I didn't give the details, I was trying to make the point at what a good heat sink the Prolimatech is.

I'm folding a single instance of notfreds on 4 cores on Win XP Pro 32, using the default memory allocation.

You should be getting more than 3.5k ppd with your setup if running XP. I don't know about Vista as I dumped it some time ago but that's another discussion. I'd suggest making sure that you are in fact folding on 4 cores and not 3 and that there isn't anything else gobbling up resources. I use Process Lasso to manage priorities and affinities but there are several programs that will handle it.

As for the Q6600 it's OC'd to 3024mhz (9x366) at 1.17v, has 2x2g of Mushkin at 400mhz on an Abit IP35Pro mb. It's a very vanilla OC. It also has 2x8800GT that are folding. Vmware-vmx.exe is at idle and the gpus at real time.

I'll probably put one of the Prolimatech's on the Q6600 at some point and see if I can crank it up a bit. It would be interesting to compare the 940 and Q6600 side by side at equal clock speeds.



Edit by Weedacres On 09/02/2009 at 20h39

   
On 09/02/2009 at 20h37

Quark

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R_34:
Temps are strange for the Q6600.

Are you using a B3 or a G0 stepping for the Q6600 ?

Because with the same clock or so I have much more cool temp.

Stock vcore ?


It's a G0 chip and to be honest I've been running it so long at this setting I don't remember on the vcore but I can't imagine it's stock. cpuz says 1.17v. Next time I boot it I'll look.

Idle temps are 43,42,40,39 . While folding for awhile they're in the low 60's, that's after adding another 120mm fan in line with the heat sink. Before that they were around 72-74c and kept setting of the over temp alarm.

   
On 09/02/2009 at 21h26

Photon

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I was getting just short of 6k on 2 notfred's vmsmp's on my Phenom II 940 @ 3.4GHz (while I could run them) never had cpu temps above 44C. Using a Red Scorpion cooler and a 40cm pedestal fan to keep the gpu's in check. Don't like the red scorpion though as it only mounts east west and blocks my RAM slots on the K9A2 preventing me running my Corsair Dominators..
Have a new Phenom II 955 and am interested to see how it goes with a stock cooler.
Hoping to get back into the notfred's smps (technical problems) currently just doing 4x uniprocessors with the 940.
kiore.

   
On 09/05/2009 at 21h03

Photon

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An interesting finding with the Q6600. Mine was running with the Alpine 7 at 3.2Ghz for quite some time but I installed a ASUS 9600GT with passive colling and I have to drop my overclock to 3.1Ghz since I was getting a lot of rc=66 (segmentation faults) with my Ubuntu 8.04 smp, and wine GPU.
Anyways I replaced my hsf with a Xigi HST-1283 and started to crank back my overclock to 3.2G.
I was doing this in XP-32 bit and running for a few hours a notfred 4core VM in VmWare WS and the native GPU2. The notfred was using the 2.10 core. I was getting about 3400 PPD on GPU2 and about 5500 on the nf VM. not to shaby :)
Anyways for some reason I swithed back to ubi with the wine GPU, and for my biggest surprise I am getting almost exactly the same PPD's with the native linux SMP as with the notfred VM.
The GPU speeds are comparable as well (wine wrapper vs. native GPU2).
Maybe the native linux advantage over XP is gone?

   
On 09/05/2009 at 23h01

Photon

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We have to wait before concluding anything about this new core.
It shows a huge decrease in performance with C2D, and don't fix all the problem with bad WU running on only 1 core instead of four.

The 2.10 core is supposed to be quickly replaced by a 2.11 for a reason I still don't know.

toTOW was supposed to gather informations today about the new core, but there is still no new on fah-addict about it.



Edit by R_34 On 09/05/2009 at 23h02

   
On 09/06/2009 at 13h15

Administrator

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I'm waiting for answers about e theory I sent to Peter ... but he didn't answer yet :(

CPUs with VT instruction should have the same performance in native OS as in VM ... there might be some overhead when running in VM, but it isn't always noticeable.

Mail Web    
On 09/06/2009 at 14h59

Photon

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Quotation:
CPUs with VT instruction should have the same performance in native OS as in VM ... there might be some overhead when running in VM, but it isn't always noticeable.


Nice explanation. Thank you! Maybe it never occurred to me since CPU without VT can not run VM at all.
I would like some explanation for an other phenomena though :top (maybe you could split this out since this is really OT).
On the forum I mentioned that my E5200 running native Ubuntu SMP with wine GPU on 9600GSO lost about 30% PPD, but the GPU's PPD jumped up with the core 2.10.
Now this E5200 cached a project 5101 (core A1) which is more like 50% decries in PPD (3400->1650) but my GPU went down with more than 500 points (4150-3630) on a 353 point WU about the same as it was with the 2.8 core :\'(
I have never tested this machine with only running GPU (unlimited CPU access) but the funny thing is I would expect exactly the opposite. the 2.8 core and the A1 leaves more spare CPU cycles for the GPU :berk

   
On 09/06/2009 at 19h27

Quark

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ikerekes:
Quotation:
CPUs with VT instruction should have the same performance in native OS as in VM ... there might be some overhead when running in VM, but it isn't always noticeable.


Nice explanation. Thank you! Maybe it never occurred to me since CPU without VT can not run VM at all.
I would like some explanation for an other phenomena though :top (maybe you could split this out since this is really OT).


VMWare will run on a machine without VT but you can not run a 64bit OS on a 32 bit host. I made the mistake of purchasing a new Dell Q8200 for the office thinking I could also use it to fold on. VMWare install fine but can't run notfreds on it. I'm stuck with Windows SMP,, ugh :@

It never occurred to me that it would not have VT support.


   
On 09/06/2009 at 19h28

Administrator

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That's indeed weird ... but I wouldn't trust much a Wine GPU client : I've noticed that a GPU client running under wine uses much more CPU power than what we could see in native GPU clients.

I don't know what causes this, but keep in mind that Wine is an emulator : it catches Windows specific function call and translates them into Linux calls. That takes time. And of course, the CUDA wrapper is doing the same (translating Windows CUDA calls into Linux CUDA calls), this also take time.

Mail Web    
On 09/06/2009 at 19h54

Photon

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In addition the GPU is also a little slower under Linux than under windows (~300-500 PPD slower).

A native Linux will solve the problem with the Q8200.
Ubuntu have all the softwares needed to work correctly.

   
On 09/06/2009 at 22h49

Quark

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R_34:

A native Linux will solve the problem with the Q8200.
Ubuntu have all the softwares needed to work correctly.


Are you saying that I can run 64 bit Ubuntu on VMWare on a 32 bit XP on the Q8200? If so I'll jump right on that.



Edit by Weedacres On 09/06/2009 at 22h57

   
On 09/06/2009 at 23h19

Quark

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Signed up since: 01/09/2009
Messages: 46
Earlier in this thread I mentioned it would be interesting to compare the Q6600 side by side with the AMD 940. At least I thought it would be interesting...

Since then I have gotten a lot more serious about overclocking the Q6600.
As it turns out I had to back off on the 940 a bit and am now running it at 3500mhz (17.5x200). I'm not done with it yet but it's been folding error free for several days at this speed.
I'm currently running the Q6600 at 3420 (9x380) with the memory backed off to 380 as well. I'll let it run overnight to make sure it's solid there before continuing upward.

Current stats on P2671 are:
940 @ 3500 = 4865ppd, 5:41TPF
Q6600@3420 = 5184ppd, 5:20TPF

Both machines running 4-core notfreds VMWare Workstation on XP32. The Q6600 notfred is throttled back a bit for the 2.10 performance problem.



   
On 09/07/2009 at 00h18

Photon

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Weedacres:
R_34:

A native Linux will solve the problem with the Q8200.
Ubuntu have all the softwares needed to work correctly.


Are you saying that I can run 64 bit Ubuntu on VMWare on a 32 bit XP on the Q8200? If so I'll jump right on that.


No it's more simple.

Run a native linux system on it.

Unless you have specific needs you can easily work with linux instead of windows.

   
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