Haswell - the silver lining in the cloud

[Nec_V20]

I have built up my new system based on the i7-4770k.

Mobo: Gigabyte Z87X-UD5H
CPU: i7-4770k
Cooler: Corsair H100i
PSU: Corsair AX860
Chassis: CoolerMaster HAF XB

I noticed that the light on the H100i cooler was no longer on whilst I was working on it configuring Windows and migrating data. I checked and the pump was no longer working.

Windows however had not crashed, so I loaded CoreTemp and the 4770k was only at around 45 degrees Celsius.

I thought, "That's weird", and loaded up FireFox and did a bit of browsing and the temperatures remained stable.

I double checked that the pump was indeed dead - which it was - and I could notice the temperature going up in the BIOS. I still wasn't convinced, so I took the pump off the CPU entirely.

When I rebooted into Windows again I kept an eye on the temperatures for all of half an hour.

I am now working on the machine and I am writing this post from it without the cooler (which I am sending back to get replaced) on it any more, just the bare CPU.

It goes to show, I have gotten so used to CPUs needing cooling or frying that I never thought of the low energy consumption of the Haswell CPUs having this bonus. The temperatures are still stable at around 45 degrees and the CPU itself is warm to the touch, not hot.

 

[BallaTheFeared]

lol, I've thought about this myself.


My power is so low I was considering setting windows to keep it throttled around 3GHz and just leaving my tower on but turning off the fans.

 

[Nec_V20]

lol, I've thought about this myself.


My power is so low I was considering setting windows to keep it throttled around 3GHz and just leaving my tower on but turning off the fans.

Actually I kind of savoured the irony of posting this thread in the Section "CPUs and Overclocking".

 

[SunnyD]

The question is what is your clock throttling to.

 

[sm625]

As long as your cpu is idling it probably wont ever have a problem. But what happens when windows decides to flip out and run 7 TrustedInstaller processes and peg your cpu? (It does happen... automatic updates, etc)

 

[BallaTheFeared]

It throttles clocks until it reaches critical temps and shuts down.

 

[ShintaiDK]

It throttles clocks until it reaches critical temps and shuts down.

I dont think it can reach critical temp in any normal way. Even without the heatsink.

 

[JimmiG]

I miss the days when Toms would post videos of Athlons literally being on fire

With SpeedFan, you can have it shut down the fans completely if the temp is low enough. I can run my computer fanless all day as long as I don't do anything CPU intensive. As soon as I launch a CPU intensive game or application (or Windows throws a fit) the tower roars to life

Unfortunately I don't have enough PWM-enabled pins on the mobo to connect all my fans that way. I run the other fans at 7V which is a good compromise.

 

[cytg111]

how about pushing it -- just a little ?

 

[Rvenger]

Load up some IBT without the heatsink.

 

[thilanliyan]

You're running with just the bare CPU? No cooling at all on the CPU? I didn't think that was possible in this day and age, even at idle?!

 

[xeledon20005]

I had to rma my h80i Because the pump didn't work. The computer said it was still at like 40-50c max. I have a 3770k gets hot if I overclock. So I leave it at the default speeds for most time I get around 24-34 idle.

 

[Yuriman]

Same thing happened to me a few months ago - pump went out in my loop. My chip was at 4.6ghz and I had an overclocked 7850 crunching bitcoins.

I didn't notice the pump was out for hours. I had some minor screen corruption so I assumed my GPU overclock was too high, lowered clocks a bit and it kept on crunching.

 

[ElFenix]

You're running with just the bare CPU? No cooling at all on the CPU? I didn't think that was possible in this day and age, even at idle?!

intel has had very good overheat protection since the pentium 4 a decade ago. the chip will throttle itself to keep from overheating. toms had a video where they took the sink off while playing quake 3. game slowed to an absolute slideshow but the processor didn't cook itself. pop the sink back on and the fps climbed back up immediately.

 

[Rvenger]

Any one wanna try running it delidded with just the bare die?

 

[BallaTheFeared]

Well, I'm cheating...

The AC is on and my PC sits right next to an outlet

Once it shuts off I'll try it again, actually my fans since they draw from away from the AC outlet (it's for my gpus really or to offset the heat they can output) I'll run it again.


Anyways, stock worked perfectly fine with a -0.130v offset, DarkKnight II is still on it, but the fans are unplugged from the mobo.

Coolest my chip has ever been because before the fans were actually heating it >.<


24C with passive cooling + 50F Central Air.

 

[Concillian]

Any one wanna try running it delidded with just the bare die?

I did that once accidentally on an AthlonXP.

Pop!

Unfortunately, not so forgiving as Haswell.

 

[rge2]

Any one wanna try running it delidded with just the bare die?

The computer will simply shut off while trying to load windows, as throttling wont keep the temp at/below tjmax.

Then you can disable prochot in bios, and sometimes the computer will shutdown at 125C cpu temp, other times it just pops cpu (? temp rises to fast and damages it prior to shutdown), and smokes from socket, like mine did here:
http://www.overclockers.com/forums/showpost.php?p=7504532&postcount=9

But yeah, the ihs is a very good heatsink. Ran many bare cpus for hours while trying to test tjmaxes with calibrated thermocouples, prior to intel publishing them, as did kevin, author of realtemp.

 

[BallaTheFeared]

It's too hot out, even at 9:30 pm the AC is still kicking on.


I managed a 25 minute blip playing bf3 on a single 7950 @ 1100/1500 - Basically a 7970 GHz. I was on Caspain Border, so the CPU was getting worked fairly well with vsync off and MVP doing its thing.

Before the AC came back on I was reaching down and touching the heatsink, after about 15 minutes it started to get warm to the touch.

This is stock with an undervolt in an open bench (no case, no direct or indirect airflow).

I imagine with just a slab of copper and a case with some low speed fans creating some air movement over the fins of the sink you could passively cool Haswell without losing any sleep.

 

[Maximilian]

I miss the days when Toms would post videos of Athlons literally being on fire

With SpeedFan, you can have it shut down the fans completely if the temp is low enough. I can run my computer fanless all day as long as I don't do anything CPU intensive. As soon as I launch a CPU intensive game or application (or Windows throws a fit) the tower roars to life

Unfortunately I don't have enough PWM-enabled pins on the mobo to connect all my fans that way. I run the other fans at 7V which is a good compromise.

I remember that video :awe:

Someone should do a modern version to see what happens when the CPU cooler is taken off whilst its running. Obviously not me in case it goes on fire etc... but someone :whiste:

 

[SammichPG]

I miss the days when Toms would post videos of Athlons literally being on fire

With SpeedFan, you can have it shut down the fans completely if the temp is low enough. I can run my computer fanless all day as long as I don't do anything CPU intensive. As soon as I launch a CPU intensive game or application (or Windows throws a fit) the tower roars to life

Unfortunately I don't have enough PWM-enabled pins on the mobo to connect all my fans that way. I run the other fans at 7V which is a good compromise.

PWM splitters are cheap (aka 4pin fan y cable)

 

[antisocialmunky]

I remember that video :awe:

Someone should do a modern version to see what happens when the CPU cooler is taken off whilst its running. Obviously not me in case it goes on fire etc... but someone :whiste:

http://www.youtube.com/watch?v=UoXRHexGIok

 

[santilmo]

http://www.youtube.com/watch?v=UoXRHexGIok

Gosh I didn't know this is even possible indeed...

Makes me want to try it out my old Athlon 64 3200 if I can find a working mobo...

 

[Maximilian]

http://www.youtube.com/watch?v=UoXRHexGIok

Yeah i know... thats the video i was referring to. Someone should do a modern version of it, see what an i7 or FX chip does. Probably nothing, no surprises but it would be cool (no pun intended) to actually see it.

 

[ShintaiDK]

Yeah i know... thats the video i was referring to. Someone should do a modern version of it, see what an i7 or FX chip does. Probably nothing, no surprises but it would be cool (no pun intended) to actually see it.

It would just go to a crawl like the P3, P4 etc. Tho it should actually work better than those 2.