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-   -   Cooling my PC ( an 8-day test of Arctic Silver 5) (http://www.ironworksforum.com/forum/showthread.php?t=96889)

Larry_OHF 12-14-2006 12:43 AM

<font color=skyblue>Test 7:

Five Minutes: 122/113F, (50/45C)
Eight Minutes: 124/115F, (51/46C)


Tomorrow night will be the final test and according to AS, the full time will have been met for it to reach its full potential.

I will perform a "special" test that goes beyond the 8-minute barrier and will actually test in a high-activity area.

All that want to see the historical event be at the ready and come marvel! </font>

Callum 12-14-2006 01:51 AM

Quote:

Originally posted by Larry_OHF:
<font color=skyblue>You said: AMD runs warmer.
The guy at Intrex said: Intel runs warmer.</font>

Intel used to run warmer. Pentium 4s are very hot chips, but Intel has sorted their act out with the newer Core Duos and Core 2 Duos, and now AMD have the hotter high end chips. I believe.

Quote:

Originally posted by Larry_OHF:
<font color=skyblue>You said:Fill all openings with fans. (my current objective).
An engineer friend said: Only two case fans should be used, one in, one out. Too many fans ruins the proper air-flow needed.

I am so confused. Shall I simply flip a coin?</font>

So long as you plan it logically, you can fill the case with fans and still keep the correct airflow.

Rikard T'Aranaxz 12-14-2006 05:09 AM

Quote:

Originally posted by Larry_OHF:
<font color=fuchsia>
You said:Fill all openings with fans. (my current objective).
An engineer friend said: Only two case fans should be used, one in, one out. Too many fans ruins the proper air-flow needed.

I am so confused. Shall I simply flip a coin?</font>

Those 2 things dont have to necessarily be in conflict. Get 2 case fans, close off all other holes (as mentioned before in here?). This will ensure maximum effenciency with those 2 fans.

Sir Krustin 12-14-2006 05:59 PM

It depends on the CPU. Later model P4s are very power inefficient (ie, they dissipate more power as heat).

Core Duos, otoh, are made with the 65nm process and offer considerable power efficiency advantages. (this, btw, is the key reason why core duos currently dominate - they still use an inferior architecture than the A64's)

Larry_OHF 12-14-2006 11:29 PM

<font color=skyblue>Tonight's Final Test

This is the final one, and I did about half an hour of testing stuff.

First, the average test. 5 minutes of "gaming" in Undermountain = 122/113F. This is the same as yesterday's standing around and doing nothing. The 8 minutes test proved the same. Therefore, I conclude that it does not matter if the game is merely on or I am battling three dragons. The heat is the same.

Next, I played through fifteen minutes, and ended up in Skull Port. Testing the temperature proved that after fifteen minutes, I was holding at 127/118F, but not going any higher. I decided to try something else. I removed the case cover from the PC to see how well it would cool down. The result was amazing. In 5 minutes, I was cooled to 115/109F!! This tells me that I just do not have enough good air flow like I need, right?

This is what I have, as I used a piece of tissue paper to verify which direction the air flow was on each fan.

Intake: 1 Fan. Front, bottom of machine.
Output: I have 5 fans. 1 on top, 1 on side panel, three in back. One of the three in back is the Power Supply's fan. Another is the high-performance output I bought to set under the GPU.

All case fans came with the case. I am wondering if I should replace these cheap fans with higher power fans, especially the intake one.

What do you guys and dolls think?</font>

Callum 12-15-2006 02:25 AM

Wow. Erm, yeah, I'd say your air flow isn't quiiite optimal. Generally you want air in to equal air out. A 5:1 ratio isn't ideal. ;)

Try switching the fan on the side panel, and the one on top around, so they are also intakes, and only the fans on the back are outtake fans.

Larry_OHF 12-15-2006 09:36 AM

Quote:

Originally posted by Callum:
Wow. Erm, yeah, I'd say your air flow isn't quiiite optimal. Generally you want air in to equal air out. A 5:1 ratio isn't ideal. ;)

Try switching the fan on the side panel, and the one on top around, so they are also intakes, and only the fans on the back are outtake fans.

<font color=skyblue>I might try that, but let me mention an issue with that first.


Since heat rises, it makes since that a fan would be on top to remove that heat. The fan on the side panel is directly aligned with the processor's fan so that it takes the hot air from the processor area on out. If I had either of those fans reversed, would that not just blow hot air directly back onto the components?


I understand what you mean about 5:1 not being ideal, but before I even added my own fan, the ratio was 1:4. Why would they construct it that way if it was not correct? I am not sticking up for the manufacturer of the case, I just don't understand why they would build something that was not good and sell it for nearly $100 (three years ago). </font>

Felix The Assassin 12-16-2006 01:19 AM

<font color=8fbc8f>@Larry. This is from the AMD site, and is similar to my CPU, I've built nothing but AMDs, and understand a letter difference might or might not make a difference (yes it's that old). I made a quick peak at Intel but could not find their well hidden true specs. Maybe one of the Intel warriors can scrounge it up?

Anyhow, what I meant by runs hotter. If you notice the temp band calls for 70* C max, that is when it will go into self protect mode, and render your current work useless. However, it will run right upto that maximum without any complaints. Hence runs hotter!

Mine is currently O/C'd and is happy at 2011Mhz, by pushing the FSB up, and the CPU voltage to 1.55V. I have grown to REALLY like the nVidia nForce chipsets, especially on an MSI M/B. You can push the CPU only, (no other component) or push CPU, and Video (DO NOT DO THIS)! And you can tweak the memory separately as well. I'm pushing my DDR PC3200 (400) upto 440, while reducing the lag, and lat times as well. End result? This setup has never risen above 50*C, even under full 3D load. And only using the stock AMD fan, and RS grease.


Quote:

Cut from AMD.com

AMD Sempron™ Details
Processor AMD Sempron™
Model 2800+
Ordering P/N (Tray) SDA2800AIO3BA
Ordering P/N (PIB) SDA2800BABOX
Operating Mode 32
Stepping D0
Frequency 1600Mhz
HT Speed 1600
Voltage 1.40V
Max Temp 70°C
Thermal Power 62W
L1 Cache 128KB
L2 Cache 256KB
CMOS Technology 90nm SOI
Socket Socket 754


Felix The Assassin 12-16-2006 01:44 AM

<font color=8fbc8f>@Larry's case. Dude, if your dropping 5*C with the side panel off you DO NOT have air flow, you have air turbulence! This is created when too many fans are pushing/pulling from each other and become inefficient, and the case may or may not have a well designed flow.

I will try to get some pictures up, and make a post on what works for 'me'. You may or may not get any ideas from it, but I received an honorable mention with this design in 2004, on a silly bet to send it to the over clockers club contest. It has hosted my last three builds, but has recently been retired to a new custom case that is easier on both the eyes and ears.

Cabling. Do you have yours wrapped, routed and tucked?
HDDs. Are they in the airflow?
VidCard. Is it well ventilated, and in the air stream?
CPU. Does the fan push or pull from the heatsink?
Is it tubed? (tubing from the side panel to face of the fan).

Fans. What size are they by position?
What brand are they?
Are they filtered?
Are they guarded? (shrouds, finger protectors).

In a nut shell. Large intake down low, pulling filtered air into the front, should be cooling HDDs. Side panel fan, 80 or 92, pulling filtered air into the middle of the case. One exhaust, somewhere center top, 80 or 92, unfiltered blowing the hot air out. Rear case. I do not prefer a rear case fan.

Power supply. Good quality name brand? How many fans? Are they fighting each other, or flowing with each other?

(I do work on my PS, I do replace the fans, and reverse their flow. The inner one pulls the hot air from directly above the CPU, and blasts it into the PS, the back fan is pulling this hot air out, and creating a vacuum for the rear of the case, which brings some cool filtered air in from the side panel fan). It is not quiet! But it will keep a O/C'd Sempron chilly cool!

General (CAUTION) nobody should be messin with their power supply without EXCELLENT knowledge, and having taught basic elec at least ONCE! They are dangerous, and can KILL you! </font>

Callum 12-16-2006 06:44 AM

Quote:

Originally posted by Larry_OHF:
<font color=skyblue>Since heat rises, it makes since that a fan would be on top to remove that heat. </font>
This is of course true, and an airflow from bottom-front to top-back of the case is often recommended, but the large difference in the number of fans prevents this because of the turbulence its creating. And there aren't really any other places you can change round.
Quote:

Originally posted by Larry_OHF:
<font color=skyblue>The fan on the side panel is directly aligned with the processor's fan so that it takes the hot air from the processor area on out. If I had either of those fans reversed, would that not just blow hot air directly back onto the components? </font>
Well, on my previous Penitum 3 and 4 computers, and my current AMD X2, the stock heatsink fan blows air ONTO the processor's heat sink. So ideally, you want the side panel fan to blow air into the case.
Quote:

Originally posted by Larry_OHF:
<font color=skyblue>I understand what you mean about 5:1 not being ideal, but before I even added my own fan, the ratio was 1:4. Why would they construct it that way if it was not correct? I am not sticking up for the manufacturer of the case, I just don't understand why they would build something that was not good and sell it for nearly $100 (three years ago). </font>
May I ask the brand? It may simply be that they are relying on more fans to sell it to consumers.


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