The Official PC building thread -3rd Edition

What should program displays main cpu temp? All the ones I know of besides Everest only give core temp from what I can tell (speedfan, real temp, core temp). Also speedfan's reported cpu temps are 15C below those of real temp and Everest.

 

Not all motherboards are supported by programs such as Speedfan and Everest. Usually Everest can tell you enough, however.

 

Red_Maw,
I agree with Sam there. Generally you get enough info with Everest to figure it out. Things like the motherboard and CPU temps switched. If the motherboard temp moves up quickly, when you load the CPU, and drop quickly when you stop the load, it's the CPU temp, not the motherboard. That's the most common one! It takes a lot longer to heat up and cool down the motherboard temp than the CPU.

Russ

 

I agree, that works well when the temps make sense. According to Everest my i7 930 OC'd to 3.34Ghz hits a max temp of 47C (idles at 33C) while the cores are getting to 61C. I can't say that isn't normal, but it's very different from what I'm used to seeing with my E6600.

By the way I wonder if the cpu and MB temps being swapped is a trait of Gigabyte boards, it seems all of us with Gigabyte boards have that issue.

Also noticed that when benchmarking, with the just the benchmark running it's faster to use 4 threads but with other apps open it's faster to use 8 threads.

 

47C main and 61C load is absolutely fine. Thankfully at 3.34Ghz the heat output of an i7 is almost identical to stock. Were you to overclock to 4Ghz, things would be very different.

 

I'll be getting to 4GHz if I can, just taking my time lol (raise it a little every time the system is turned on). Guess I'm just really surprised to see the i7 running cooler than the E6600.

I'm mostly worried about the MB now, the chipset isn't getting any air flow thanks to the huge cpu cooler. At the current rate it won't be surprising to see it in the 60C range come summer.

 

On the contrary, large CPU coolers help cool the chipset due to the nearby airflow.

 

I'll take a picture when I install the 5850 to show how it's arranged; it certainly doesn't look like there would be any airflow in that area.

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Any suggestions for case fans? Looking for the one's that will push a lot of air but can be tamed when needed by a fan controller. Currently looking at these two:

http://www.petrastechshop.com/14yalod1cafa1.html
http://www.newegg.com/Product/Product.aspx?Item=N82E16835185060

I wonder if undervolted Delta's would be tolerable lol

 

spam edited by ddp

 

Red_Maw,
The Scythe's are good fans, and they are pretty honest with their specs. I would change that 110 cfm fan to one of these.
http://www.newegg.com/Product/Product.aspx?Item=N82E16835185058

A much more reasonable 68 cfm. There's no reason to ever need that powerful a 120mm. If you need that fan to keep your computer cool you have something seriously wrong with your cooling scheme! At 37 dBA, it's also very loud. Remember too that if you are using it as an exhaust fan, you have to have enough intake airflow to balance that fan's output airflow. Otherwise it runs hotter because of high negative case pressure. I'm going to increase my intake air by 15 cfm, by moving a 53 cfm Silverstone fan from the rear, to the front as an intake. The fan I just linked you is going in the rear, as an exhaust. Both fans are about 15-17 cfm higher than the fans they are replacing, so the balance of the case airflow stays about the same. A lowering of the side 80mm Silverstone exhaust fan to about 800 rpm should be just about right!

I use airflow characteristics in my work, so I just apply the basics to case ventilation. I have to manage 3.5 to 4.5 cfm airflow through a space less than 1/100th of a cubic inch in order to keep things running smoothly, while seeing that the turbine turns at over 400,000 rpm, at less than 70dBA, and has enough torque to cut the tooth!. All of this, just so the Dentist can drill your teeth! LOL!! Case ventilation is just a hobby, but it's getting to be more than that as they keep cramming more stuff on the motherboards. video cards are getting more powerful and running hotter, and more and more systems have two or more video cards in them, or at least Hybrid CrossFire. Lots of heat you have to work at removing. Keeps me on my toes! LOL!!

Best Regards,
Russ

 

If you have to undervolt Deltas, they're pointless. Delta fans by design run very fast, but are extremely inefficient at low speeds. A fan with a lower maximum rating would be up to twice as powerful for the same noise level. Go for high-speed versions of trusted fans like the Scythe Slipstream. I use six of the 1900 Slipstreams as you have linked, and they're excellent - very powerful at high speed, very quiet at low speed.

 

Hey kompuutte, Lightning struck! LOL!

 

Ah hah! I finally plugged mine in last night. It was bearable at full speed! And was pushing quite a bit of air. Can't wait to compare it to the Tuniq's stock fan. While I'm sure the comparisons been done, I'd like to see it for myself

WITHOUT running wires through the fans thank you very much ROFL!

 

Thanks for the advice Russ. Since they're going to be on a fan controller they will be running only as fast as needed so there's no real need to buy the 1200 rpm one's instead of 1900rpm to cut noise. Also the 1900 rpm one's will be ~7$ cheaper lol.

Oh well it was worth a try, never know when you might need a 240cfm fan lol.

 

Never. I agree with Russ, if you need that much airflow all the time, you're doing something wrong!

 

Going off balancing the airflow, anyone know of any high (above 68cfm) cfm 140mm fans? My case has 3x120mm intake fans (front), 1x120mm exhaust fan (rear), 2x140mm exhaust fan (top).

The other option (besides better case fans) would be to place a slot cooler below the chipset; even though I'm not a fan of those that might be the best solution.

I forgot to take a picture when installing the new gpu so this will have to do:


The black square indicates the approximate size of the cpu cooler and it's top barely clears the side panel. Red arrows indicate fans and their airflow direction.

Any advice is appreciated.

TIA,

redmaw

 

personally i think haveing more of an intake is better than an output. that way air is forces though the back slots/mesh etc, cooling differnt parts of the case.

 

Thanks shaffaaf, that could work, didn't even think of it. It would force some air past the chipset which is in a dead-zone right now. Usually I go with a negative air pressure design although I don't think I've ever seen any benefit lol.

 

I usually use negative pressure, but for the moment I think pressure is slightly positive, simply due to the way my case is laid out. Personally I think as long as you're close to being balanced, it doesn't really matter which way round you have it, but it should be noted that due to the way fans mount, intake fans are always noisier than exhaust fans.