New Nas CPU - i5 Sandybridge, ivybridge, or i3 ivy?

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mstang1988

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May 19, 2010
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Going to upgrade my NAS with a bit more storage using ZFS which is RAM and CPU intensive, especially once de-dedupe is more common and turned on in future freenas builds.

Fry's had an i5-2400 for $118 which got me thinking quad core but the TDP was high, can't decide if too high.

I have no need to overclock but may undervolt/underclock a bit to keep it nice and cool in an ITX case. Do I need to go with an unlocked processor to really have the last bit of control like a 3570K?

What's the real world difference between a 3450 and a 2400 in terms of heat in a small case?

 
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The 3450 (75W) has lower TDP which means less heat (~20W less) for the HSF and VRM to dissipate. You could also aim for the 3470S/3450S (65W) to shave yet another 10W or 3470T (35W) to shave 40W more. 30-60W less in what would otherwise be a ~130W SFF system should make a fairly noticeable difference in case temperatures if it has somewhat limited airflow.

As far as undervolting goes, this depends on the motherboard.
 
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There is no way to cool down these cpu's what part of:

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You don't understund?

In a NAS system there is no room for massive cpu coolers anyway, 2 NF-P12 (2 x 1,08 Watts) are more than enough if he deactivates the onboard graphics card he can connect it to his pc and working it as a storage from there anyway.
 
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You are the one who does not understand that Ivy Bridge is perfectly fine. Millions of those CPUs are out there and the world has not gone through thermonuclear meltdown. Hundreds of people on these forums bought one and are perfectly happy with their IB as well.

So please just quit heat-trolling.
 
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You have to give him 10/10 for trolling though he even went away for a week and made his own website!
 
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I used more close to the earth examples "the road to cpu cooler", "highways" but my english are not very best and i know it.

I asked Pinhedd's help that is always more accurate than me and toled me he will rewrite some parts...

What else can i do?
 
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Heat is heat, temperature is temperature, running hot doesn't mean it made more heat. Temperature is a function of heat generated, cooling performance, and ambient temperature so while ivy may seem to run hotter that would be because of worse cooling performance the total heat generated is less so the air temperature immediately around it will be higher but left in a sealed box it will heat up the air slower than a sandy bridge CPU.


Also, your page has some issues. Capacitors don't cease to function properly above their rated temperature, they just age faster. 85C capacitors will still work at 105C they will just age about 4x faster(aging rate approximately doubles for every 10C above the rating), also the caps around the CPU aren't getting anywhere near 90C when the CPU is at 90C, the fins on the heatsink are likely only around 50C since there is a temperature gradient in the heatsink that progress from the hotpoint(the base) to the cooler points(the tips of the fins) the air around the heatsink is no where near the temperature of the CPU itself so that piece is a chunk of FUD.


Also, thermal camera pictures with no scale shown to tell you how hot each color is are meaningless, cameras change their scale depending on the hottest item in the picture to provide you with contrast. Dark red is the lowest and dark blue is the highest in each picture but i have no idea if red is 20 C and blue is 30 C or if red is 0 C and blue is 200 C without a scale.



As for the actual topic at hand, reducing the TDP of the CPU used means that you don't need as much airflow to keep temperatures at a rational level, undervolting will further reduce it. The Phenom IIs could get a signficant drop in TDP from undervolting(they were set much higher than needed), I am not sure about how much of an effect it has on ivy bridge but reducing voltage will always reduce heat output so it is worth a shot.
 
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learn some basic physics please, specificaly around temperature Vs Heat energy. I have my 3570k idling at 30-33, maxing at 60-62 @ 4.3Ghz on cheap air.

in a small case the number of air changes per minute can be a lot higher, its air changes that gets rid of the heat build up, so it can run happily in a small box.
 
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Thanks for the debate guys! My question was more academical. Intel typically rates a class of CPU's at a given TDP and they will often perform under depending on where they rank in their class, at least that's my observation. I was interested in real world observations of these CPU's and their characteristics.

The guy that hates IB can leave the discussion.

 
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Run a prime 95 torture ONLY 4 THREADS, 6000 bytes (6Mbytes) minimal fft, half the ram of your system ussage and post me a screen shot.

I need only system, cpu temprature from speedfan. But i did warn you i know something you don't ok?

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even indigo 2 extream faild to these cpu's....
 
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And your speedfan shot says 'Intel core 2 quad' which is not ivy bridge by far....
 
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Yes it was 105 watts processor and i asked HALF of that processor was doing... were is the problem?

I mean he wrote "I have my 3570k idling at 30-33, maxing at 60-62 @ 4.3Ghz on cheap air." There is no problem? you bet his 79 watts cpu can't handle 4 threads with his cache full and half the ram? I know it.

Ps I'm still trying to find a cooling solution for ivy's cpus when i will get finaly Succeed i will post in the web page for sure trust me, what to post the failures? Amuffin what do you think about this one?
 
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will respond tonight. Although I usually use IBT/linpack as its hotter. Any particular version of prime 95?

It was video encoding all day yesterday should I wait for a few days before it is cool enough to use again?
 
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You can follow the steps 1 2 3:

http://mersenne.org/freesoft/

I don't know how many days you must wait untill your cpu to cool down is usually getting 1-2 minutes...

Do you want me a link for the speed fan?

http://www.almico.com/speedfan.php

You know how to press the printscreen right?

 
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I don't claim something I allready don't know and the fact is your cpu can't handle 4 threads with your cache full and the half ram of the system without getting 90 c to the cores (-15 c from the die temprature) and way above 105 to the system use any prime95 you like the same result over and over again and you can't do nothing to stop it.

I know why and i post the link for you the thing is when you finally realize it.

PS i tell you what try a little you will see it then stop it no way to make 2 hours with these tempratures... i mean really really i search any possible solution my self beacouse this cpu is no go for me
 
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Even in stock it makes no diffrence read this carefull and tell me what part is not clear to you

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Then run a test with any prime you like and post me a screen shot.

prime 95 torture 4 threads ONLY minimal/maximal fft all the cpu cache 8192 (8MBytes) + half your system ram.

 
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He's the resident thermal troll, keeps repeating that Ivy Bridge CPUs run hot enough to initiate nuclear fusion; I doubt you will manage to make him shut up no matter how much proof you collect and present. There are already plenty of people running IBs well under 80C full-load, often less than 70C but he keeps saying it is impossible to run IB at less than 90C.
 
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I know, worth 30mins on prime to see what rubbish he comes up with. All day encoding 100% usage, + SWTOR (its rubbish) and nothing over 60C.

In a small case there should be no problem, as the airflow will be that much better. It might also help the OP make a call with some actual data, unless he's given up due to the back and forth.
 
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