I have a cruncher (Keplerbox) running an I7-4771 Haswell processor and 2 high-powered GPUs (a GTX 660TI and a GTX 670).
I am running 3 tasks on each GPU and 7 of the 8 HT cores on the CPU are in use by BOINC.

Two things lead me to think about changing the CPU to NOT run hyperthreaded.

1) statements I read in the Fora that HT really doesn't get much more work done (and since GPU >>>> CPU for getting work done, it shouldn't affect my RAC very much anyway).

and

2) The Haswell (as advertised) runs HOT - even with a Noctua super air cooler, it's flirting with 80C all the time.

So: if I go back to only the 4 real cores (no HT), I will have to change the limit to 75% of cores used (3 of 4) and also use app_config.xml to limit the number of simultaneous GPU APs to 3 (so I don't overcommit cores).

i.e, something like <max_concurrent>3</max_concurrent> for astropulse_v6

But in the app_info.xml I already tell BOINC that astropulse_v6 on the GPU requires 1 CPU core. Given that, do I also need to use the <gpu_versions> parameter in app_config.xml?

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The Haswell (as advertised) runs HOT - even with a Noctua super air cooler, it's flirting with 80C all the time.

If you are running at factory settings check your thermal solution for a problem.

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If you are running at factory settings check your thermal solution for a problem.

This is apparently "normal" for Haswell.

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Hi there. I have a Haswell also and I'm running at 49deg C.

I have a GTX 780 running full blast and 5/8 cores are crunching on the CPUs.

I had problems until I went into the system BIOS and disabled the built-in Intel GPU and turned the CPU fan up to full blast. Now my box is kicking butt.

Mike

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Hi there. I have a Haswell also and I'm running at 49deg C.

I have a GTX 780 running full blast and 5/8 cores are crunching on the CPUs.

I had problems until I went into the system BIOS and disabled the built-in Intel GPU and turned the CPU fan up to full blast. Now my box is kicking butt.

Mike

I'll try disabling the graphics and see if that helps my situation. But I am running 7, not 5 cores, so I doubt it will come down to 49 degrees. But any improvement will help!

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In my UEFI BIOS, I found a few settings that were graphics related, but nothing that said "deactivate onboard GPU".

Here's what I found:

Primary Graphics Adapter: set to PCI Express

Under Advanced Chipset I found

IGPU multi-monitor: set to Disabled
Render Standby: set to Enabled
Shared Memory: set to Auto

Is that sufficient to disable the CPU graphics? Or did I miss something?

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But I am running 7, not 5 cores,

You have 4 cores and 8 CPUs; really 1 CPU with 4 cores and 8 threads but defiantly not 8 cores. You have to wait for the i7-5960X Haswell-EP for that.

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But I am running 7, not 5 cores,

You have 4 cores and 8 CPUs; really 1 CPU with 4 cores and 8 threads but defiantly not 8 cores. You have to wait for the i7-5960X Haswell-EP for that.

I know that the cores are virtual; I was just responding in kind to the other poster.

BTW (and OT): any answer to my query about app_config.xml?

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Even though neither of my rigs are not Haswells (2500K & 3570K) they must either have a monitor or a dummy plug connected to activate the on die video otherwise they are disabled and as your 4771 rig isn't showing its 4600 in its details then I'd say that it is disabled as well.

Cheers.

I know that the cores are virtual;...

Cores are hardware, it is the "processors" that may be virtual.

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I know that the cores are virtual;...

Cores are hardware, it is the "processors" that may be virtual.

HEY - lighten up a bit. I was doing virtual systems in the '70s; don't be so pedantic. We're all friends here.

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In my UEFI BIOS, I found a few settings that were graphics related, but nothing that said "deactivate onboard GPU".
[cut...]
Is that sufficient to disable the CPU graphics? Or did I miss something?

It depends on your chipset, some support the GPU on the processor, some don't.
If you're using one that doesn't, you won't have an on-board graphics choice.

-Dave

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First off I'd like to say I'm an idiot. I was looking at my GPU temp not my CPU temp with I said 50 deg...


I rebooted to check my BIOS.

Under Peripherals I have:
Inter Processor Graphics

which I have disabled.

Under Performance, I have:

CPU Fan speed (full speed)

Also, I used Precision x to set my GPU fan to a higher than normal speed.


Don't know if you have these exact options...

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First off I'd like to say I'm an idiot.

Welcome to the club!

As I mentioned above, those were all I could see.

As far as CPU fan is concerned, I will check in the BIOS, but, given the CPU temp now, I would think the fan (if variable speed) would be running at or near max speed.

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Well, I restarted the machine, and in BIOS I set the CPU fan mode from "Standard" to "Full Speed". The CPU fans (push-pull) were loud on restart, but, as I suspected, when crunching was going full bore, the temps were just about what they had been before.

So no help there.

First off I'd like to say I'm an idiot. I was looking at my GPU temp not my CPU temp with I said 50 deg...

Well, what WAS/IS your CPU temp????

BTW: Speedfan reads about 20C LOWER than my other s/w, CoreTemp, at least on my machine. But I believe Coretemp because of comments on the Net.

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Hi I have been following this thread and just wondering if you found a solution as to why your cpu temps are at 80C? I have to add that if my Sandybridge (i7-2700K) were running at the equivalent temps as to what's expelled from the dual-exhaust on my pick-up, I'd have serious cause for concern. Especially, though I only crunch gpu WUs, since my cpu temps never exceed 35C. In an attempt to help solve your dilemma, I have a couple questions...

What is the cpu temp at idle, after booting to desktop, say for 30-60 mins.?

Have you tried adjusting computer parameters to one cpu thread > one gpu wu?
So in this case, you would have 6 cpu threads > 6 gpu wu's (with 2 cpu threads free to crunch cpu wu's). If results still show temps above 60C, I would think problem is thermal...more fans, re-seat the processor with higher quality paste.
Anyway, hope you find a solution soon, good luck.

Regards

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Hi I have been following this thread and just wondering if you found a solution as to why your cpu temps are at 80C? I have to add that if my Sandybridge (i7-2700K) were running at the equivalent temps as to what's expelled from the dual-exhaust on my pick-up, I'd have serious cause for concern. Especially, though I only crunch gpu WUs, since my cpu temps never exceed 35C. In an attempt to help solve your dilemma, I have a couple questions...

What is the cpu temp at idle, after booting to desktop, say for 30-60 mins.?

Have you tried adjusting computer parameters to one cpu thread > one gpu wu?
So in this case, you would have 6 cpu threads > 6 gpu wu's (with 2 cpu threads free to crunch cpu wu's). If results still show temps above 60C, I would think problem is thermal...more fans, re-seat the processor with higher quality paste.
Anyway, hope you find a solution soon, good luck.

Regards

Haswells have voltage regulator built into the cpu, that is what makes them run much hotter than 2xxx and 3xxx ix generation intels.

Comparing your 2xxx to 4xxx is pointless, they are two different beasts.

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[/quote]
Haswells have voltage regulator built into the cpu, that is what makes them run much hotter than 2xxx and 3xxx ix generation intels.

Comparing your 2xxx to 4xxx is pointless, they are two different beasts.[/quote]



Yes, I realize the i7-27xx is two generations back and I actually went back to re-read a review or two on current i7-47xx models and despite the on chip voltage regulator, saw no confirmation that 80C is the normal 24/7 operating temp for this particular processor...50C-60C tops for 24/7 use, not 80C=176F.

Regards

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As I said, around 80C is not abnormal for a Haswell: (this, from xbitlabs)

To illustrate Haswell’s thermal performance we performed a quick comparison between Core i7-4770K and Core i7-3770K working in their nominal mode and tested with the same NZXT Havik 140 cooler:

(I can't figure out how to copy the chart they showed, but where (under heavy load) the 3770K was at 59C, the 4770K was at 78C)

(I take "nominal mode" to mean not overclocked)

And when heavily OCed, the 4770K got up near 100C (gulp!).

Here's the link:

http://www.xbitlabs.com/articles/cpu/display/core-i7-4770k_12.html

and SETI does drive the CPU pretty hard when using 7 of 8 HT cores. Like in the 95-98% usage most of the time.

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My understanding on Haswell is that Intel redesigned the internal heat spreader and rather than soldering it, they are now using a thermal paste. There are lots of online postings about 'delidding' Haswell and using alternative TIM products. I have not done this on my i7-4770K as of yet but am considering it. Typical benefit is a lowering of core temperatures by roughly 20°C. YMMV

John

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