gotoh
New Member
Posts: 36
|
Post by gotoh on Jul 21, 2006 10:20:55 GMT
my first cooling mod for GigEI still need to drill more hole on the bottom of the case as 80mm fan makes quite some noise in high RPM mode and sucks little air. Best would be to cut a real blow hole. I'll try to do it, but I only have basic tools.
|
|
gotoh
New Member
Posts: 36
|
Post by gotoh on Jul 21, 2006 11:27:29 GMT
I just drilled twice the number of holes for bottom 80mm fan. Much more airflow and much less noise. Now the noisiest fan is PLX fan (globalwin) I'll try to find a Papst, but these things are hard to find here in France...
|
|
|
Post by rampancy on Jul 21, 2006 12:12:17 GMT
Nice job! If you're concerned about noise you may want to look into using a fan gasket for your 80 mm fan and/or some low-density noise absorbing foam.
Something you also may be interested in considering is Contour Design's G-Riser - if you can get a hold of a pair of those you can increase airflow into your bottom fan considerably.
|
|
gotoh
New Member
Posts: 36
|
Post by gotoh on Jul 21, 2006 13:47:09 GMT
thanks for the tips
|
|
|
Post by aquamac on Jul 21, 2006 17:33:15 GMT
Hey Gotoh, That should help. Been thinking recently computers only really need cases to protect them from static & prying fingers. The idea that the case protects the components from dust is wrong. If you look inside most computers they are full of gunk anyway. All the fans & noise are to counteract the effect of the case, so its not surprising that Apple came up with the G5 case. When I look inside my G5, it is no dustier than my other computers. So if you wanted to increase ventilation further you could put more drill holes in the case above the Drives & PSU. Red Dragon did a similar thing on his G4 AGP, but removed the piece of metal completely. Every hole helps. Anyway thanks for sharing your mods with us!
|
|
|
Post by reddrag0n on Jul 21, 2006 18:28:27 GMT
Sure, bring me into this equation... lol anyways, yeah, i cut my case for 2 reasons. Airflow and looks. Top fan mod & Top fan mod 2. As for the rest of the case being dremmeled to h*ll, i looked to Riscx.
|
|
gotoh
New Member
Posts: 36
|
Post by gotoh on Jul 24, 2006 16:19:25 GMT
and here is the second fan every fan is now spinning at 7V, so it's relatively silent and the whole system is not running too hot.
|
|
|
Post by reddrag0n on Jul 24, 2006 16:52:03 GMT
I'm almost tempted to take a page from the Quicksilver books and eliminate that huge fan bracket altogether. I was thinking of a good outside fan grill with a 80 to 120mm fan adapter with an aftermarket 120mm fan on the inside. That would eliminate the 120 from trying to gather air from the inside of the case and blow fresh air directly on the cpu and pci cards. Also gives me a reason to use the new drill press my landlord bought a month ago. hehehe
|
|
|
Post by aquamac on Jul 24, 2006 18:25:29 GMT
That looks sweet Gotoh!
Nice job, I think it is better than the heatpipe option + looks lots neater. When you get bored one day you can still put 2 fans in the top for exaust!
JJ, You could always just fit a 120 fan straight onto the plastic side panel with a grill. You might have to make a shim to take into account of the case curvature, but this should not be too hard.
|
|
|
Post by B B on Jul 24, 2006 21:17:17 GMT
Nice job! If you're concerned about noise you may want to look into using a fan gasket for your 80 mm fan and/or some low-density noise absorbing foam. Something you also may be interested in considering is Contour Design's G-Riser - if you can get a hold of a pair of those you can increase airflow into your bottom fan considerably. I do totaly agree with. The case ets more space for breathing .That's why I use the G-Riser with my MDD and my Maxi Mirrored Cube.
|
|
|
Post by rampancy on Jul 26, 2006 0:42:34 GMT
I do totaly agree with. The case ets more space for breathing .That's why I use the G-Riser with my MDD and my Maxi Mirrored Cube. I find it curious that you're using the G-Riser with an MDD. How did you get around the problem that the bottom lip of the riser causes when it blocks the bottom forward air inlet? I realize that air can also come in through the four holes at the front, but still, having that obstruction there makes me somewhat leery of how much air is coming into the case.
|
|
|
Post by B B on Jul 26, 2006 1:44:03 GMT
I do totaly agree with. The case ets more space for breathing .That's why I use the G-Riser with my MDD and my Maxi Mirrored Cube. I find it curious that you're using the G-Riser with an MDD. How did you get around the problem that the bottom lip of the riser causes when it blocks the bottom forward air inlet? I realize that air can also come in through the four holes at the front, but still, having that obstruction there makes me somewhat leery of how much air is coming into the case. I guess you have not yet read the thread about the exteriorization of my MDD. I put the photos here: forum.macbidouille.com/index.php?act=module&module=gallery&cmd=user&user=18593&op=view_album&album=181 I am busy with the comments in English I will put on my web page.
|
|
|
Post by B B on Jul 26, 2006 1:50:53 GMT
Hey ,rampacy the full name of the thread is "Mods MDD witth exteriorization of the PSU" inside MDD mods
|
|
gotoh
New Member
Posts: 36
|
Post by gotoh on Jul 27, 2006 7:57:10 GMT
huge difference when you drop room ambiant temperature (or if you move to a cooler room) My room reached 38°C last days (well known french "canicule") and even if my system is rock stable, CPU heatsink becomes pretty hot after running few minutes of DNETC (but it seems to reach a stable high temp point) When I open the G4 case, inside temp must be around 50°C (not surprising when the fresh air coming into it is already 38°C) Yesterday I moved the GigE to the basement where ambiant temperature is a lot more tolerable (let's say 27°C) and now CPU heatsink stays really cool on normal operation, and just a litle hot with DNETC running. So I guess my airflow improvement is really effective. I've ordered new fan regulator as running 4 fans on a single one just killed it (it started smoking and then it only worked when set at full speed). So I'll be able to run fans at full speed on the few summer weeks when my room overheats, and will be able to let system run almost silent for the rest of the year. Now I'm pretty happy with my system. These dual 7447 are really faster than I thought - reading everywhere that having only 512Kb L2 on a 100Mhz bus would be a big bottleneck, I can now say it's not true as even if I lowered speed to 1,4Ghz to have it cool running, and when I diseable 1 CPU, the G4 is still very responsive, even with its old specs (100Mhz bus, AGP 2x) I feel it's even more responsive than the screaming dual 1Ghz MDD I had last year (hell it was noisy, even with the improvement I did on it)
|
|
|
Post by aquamac on Jul 27, 2006 17:34:29 GMT
People quite often forget about the fact the 47's have twice as much L2 cache as 55's. This goes a fair way towards making up the difference in speed. You also have the benefit of a cooler running chip, which lets face it helps a lot when you are stuffing the thing in a G4 case. If only you could get Dual 2.0Gig 7447 G4 chips & I don't mean 1.6's running at 2 Gig!
|
|