Stress Test

Looks good. Standard cooler? With the maximum heat setting (In-place large FFTs) on my Core i5 750 with a Thermalright HR-02 (huge cooler) and a Nexus 120mm low speed and noise fan running @ 6.8volt (lowest voltage that still allows the fan to turn, so it turns very slowly), I get around 56 degrees under load (case closed, case open it is slightly lower). So definitely not bad results.

Haven't ever had a CPU that was DOA, usually I rather run Prime95 to confirm the system is stable overall, but I've never gone for more than three hours. Usually if it will fail it happens fairly quickly in my experience...

Btw. is that x86 or x64 (Windows). There is a x86 and x64 Prime95. Yeah I know you're done already just pointing it out anyway :p
 
nakedpeanut said:
It's average... I'm assuming you got the stock cooler?
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What kinda temps do you get with case closed and your overclock? Running Prime95?

Btw. what do you guys use to measure temps, I've always used Real Temp... (On Intel)
 
nakedpeanut said:
It's average... I'm assuming you got the stock cooler?
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Eish.. not standard.. got low profile cooler.. Thermatake jobbie. I got a desktop case ... The cooler designed for low noise .. more for HTPC if you like.. But just wanted to know if the temps are good for the running..
or a bit too high ?
 
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nakedpeanut said:
I'm sitting at 60 load but I got Water cooling... Use both coreTemp and Realtemp just depends on which icon I feel like clicking :) http://mybroadband.co.za/photos/showphoto.php/photo/19125/title/side/cat/all
I still wanna lap my block and replace my paste with that liquid pro just waiting for exams to end
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Heh, my cooler doesn't do too bad then, was beginning to wonder if maybe I didn't seat it properly, but then again my case doesn't have very good airflow being low noise and all. Like the setup btw. how is it noise wise?

nakedpeanut said:
Damn AI
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Err, yeah there is a reason class was so empty this semester ;) Definitely the module with the most work this year. Every assignment is like a mini-spe, not for the lazy.

Dan C said:
a bit too high ?
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Considering that is Prime95 after an hour. It's perfectly acceptable, you definitely won't run into heat issues IMHO.
 
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Well to keep the noise low I've got my fans running at 50% and they in pull so that decreases the effectiveness but keeps the air noise lower than push.. But I'm going to buy some better/quieter fans that are PWM and after all is done (lapping and new paste) I should drop by 10C with less noise.. Damn Yateloons are too noisy!
 
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Hehe, take a look at the Nexus 120mm Real Silent Fans :p Cyberdyne is selling them last I checked. Not sure if they are suitable for air cooling but I can definitely tell you they are incredibly quiet.
 
Gnome said:
Hehe, take a look at the Nexus 120mm Real Silent Fans :p Cyberdyne is selling them last I checked. Not sure if they are suitable for air cooling but I can definitely tell you they are incredibly quiet.
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Scythe Gentle Typhoon
At the same airflow its 2dBa quieter, uses 10x less power (though 0.3W vs 0.03W is not exactly "wow") and can ramp up to 50% more airflow at 28dBa. They also cost ±30% more though and can only be had via imports.
 
Archer said:
Scythe Gentle Typhoon.
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I think we've had this argument before but which review puts it at higher airflow and lower noise?

SilentPCReview puts the Nexus as their current best fan. Not sure if I saw the Scythe reviewed there tho...

I'm genuinely interested, just not willing to go on manufacturer specifications.
 
Just don't make the mistake like I did by trusting the specifications of the CoolerMaster Sickleflow fans! They're actually very noisy at 12V and since they don't have PWM, you can only lower the speed by using a modified Molex connector to run it at 7V.
 
Yeah I don't, hence the reason for 3rd party review. I bought myself some of those Nexus fans (I imported tho, Cyberdyne didn't sell them yet) because they have a review @ SilentPCReview. Almost all manufacturers DB specs differ from those posted by SilentPCReview :(

Btw. the Nexus PWM is more noisy than the non-PWM, according to SilentPCReview. So I soldered a 5w resistor (costs approx. R2ea for the resistor from Electronics 123) on a power cable converter thingy to get it to around 6.9volt. Inaudible now. Will happily provide the resistor specs to anyone interested in buying some of the non-PWM.
 
Argh, finding reviews for the Typhoon is next to impossible. I'm mostly going on the sentiment of many water coolers. I did find one review though, and while the nexus was indeed quieter, in that review it barely moved any air (the Typhoon moved 6 times more) which is way out of what you expect form their specs so I dont know what to do with that review :confused: Maybe next time I am in need of some fans I'll buy some Nexus ones, put them next to the Typhoons and see what happens. The nice thing about the typhoons though is that you can wire up lots in series (so all are at the same speed) since they draw so little power.
 
Gnome said:
Btw. the Nexus PWM is more noisy than the non-PWM, according to SilentPCReview. So I soldered a 5w resistor (costs approx. R2ea for the resistor from Electronics 123) on a power cable converter thingy to get it to around 6.9volt. Inaudible now. Will happily provide the resistor specs to anyone interested in buying some of the non-PWM.
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That's just stupid :p
Rather modify a fan molex connector to give you 7V, instead of wasting energy with a resistor where you don't really know what voltage it would give you, unless you measure it ofc.
The molex connector mod is simple: move the ground pin to the +5V pin.
The result would be +12V - (+5V) = +7V :D

I've just stress tested my i7 860 at the office using 7-zip and it maxed at 80'C using Intel's stock cooler :(
 
Pada said:
Rather modify a fan molex connector to give you 7V, instead of wasting energy with a resistor where you don't really know what voltage it would give you, unless you measure it ofc.
The molex connector mod is simple: move the ground pin to the +5V pin.
The result would be +12V - (+5V) = +7V :D

I've just stress tested my i7 860 at the office using 7-zip and it maxed at 80'C using Intel's stock cooler :(
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I worked it out beforehand ;) Have a huge resistor collection so it was quick just putting a few in to see (naturally I did some quick calculations also which narrowed it down to 2 but current used by the fan changes with voltage so couldn't be sure). Couldn't get a resistor for exactly 7volt so it's at 6.9 +- I don't like those 7v mods personally which is why I didn't do it.

The 5w resistor I just used because it wasn't expensive and gives plenty of head room. But they barely get hot (could just barely tell it was hotter than ambient).
 
lol should change the name of the thread to silent fans :p

Since we on a slight derail I came across this post a while ago: http://forums.techpowerup.com/archive/index.php/t-107135.html

What it is:
So you went out and bought a high quality aftermarket heatsink/fan but most of them only come with a 3-pin fan. Or maybe you want to use the cpu's fan controller to power additional fans. Or perhapse you want to take advantage of a high speed fan but you don't want to hear it or fork out the cash or deal with adjusting a manual fan controller. Most motherboards have cpu fan throttling adjustments in the bios but you can't take advantage of them with your new 3pin fan! This schematic shows you how to use only 3 components to allow the motherboard's 4-pin CPU fan connector to control 2 or 3-pin fans.

The motherboard's 4-pin fan header:
The 4-pin fan connector has power, ground, tach, and PWM connections. The PWM signal from the motherboard is open or grounded. When the signal is open the fan opperates at full speed. When the signal is grounded the fan is at it's lowest speed. The motherboard controls the fan by switching between these states.

How it works:
The transistor is held in the 'on' state by applying a current to it's base via. the 10k resistor from +12v to the base. The PWM signal from the motherboard sinks (grounds) the base to turn off the transistor. This resistor is needed to both turn the device on and limit the amount of current the motherboard has to sink to 1.2ma. The second resistor, also 10k, limits how low the pwm signal can sink it (and subsequently reduces the current current the motherboard's pwm circuit to .6ma). This keeps the fan opperating at a minimum RPM.

The NPN transistor was chosen because they are generally easier to find.

The 10k resistor in series with the PWM signal can be substituted with a 10k pot to give you 0-50% adjustability of the MINIMUM fan RPM.
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