Straight_ManGeeky, in my own wayNaples, FLIcrontian
edited November 2003
OK, actually you have TWO options:
First, increase the power of the back fans-- that will bend the airflow out the back. For even more bend, try increasing the input fans.
Second, If you do this and still have airflow\cooling issues, try to get a holesaw and make some side blowholes in LEFT side of case that start a bit down and toward HDs from where your RAM fan is (that sucker is a tib TOO big in diameter, and is bouncing air off the side of your case, and the turbulence of the ari bouncing back at the board is part of where your cooling problem is). DO NOT fan these holes, you want input venting there. Dust filters on inside of blowholes to keep dust out of case would be nice and even recommended.
John. (playing at HVAC engineering, know a couple down here, and they taught me convection calcualtions.)
mtgoat, that setup looks pretty strack. That must be close to 400grams hanging off the agp slot. How secure is it? I'm leaning toward Zalman and away from the Vantec Iceberq 4 pro.
Thanks for the info. I've read a few sites where they've had to refrigerate their cards before popping the HSF off, the thought of trying that scares me..lol Is your 9800 a Sapphire? Mines a Sapphy NP soft-modded to Pro. Just wondering if that makes any diff.
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Straight_ManGeeky, in my own wayNaples, FLIcrontian
edited November 2003
The bridge chip under the video card cooling can get by with a light heatsink like the older style CPU passive heat sinks, about a 25x25 mm one. Air should be sucked toward top back of case off of it. The green chip below the riser wires that cross it is my concern, that might need the wires LOWER so if you can move the riser to a lower PCI slot so air can come up off the chip and consider a passive there also. Most bridges do not need fans, but case DO run cooler CLOSED if vented right. In your case, close case, and cut blowholes with a center point vertically down toward lower front fans and about 2\3 toward FRONT of case. This will enhance the designed in front-low to back-high air flow with no more power draw. THAT is what I would try for, counteract the big fans blowing toward left side of case, bend air flow up toward back high. Right now, you have fans in back fighting turbluence with side off, and CFM flow is not what the fans can do if speced right (probably about 60% effective back fans due to forced back flow from the fans blowing out left side (front of picture).
John.
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Mt_GoatHead Cheezy KnobPflugerville (north of Austin)Icrontian
edited November 2003
MJO had this to say Hmm is this right?
I have just installed my new ZM80C-HP and I have been running both 3DMark and BF1942.
The heatsink isn't even warm to the touch.
I have the optional fan as well, running at 5V.
It is quite cool in my livingroom and the case is open.
Sounds like you have it under control. I wish I lived where it was cool. It's just going on 10 AM here and it is already 77 F outside and will get into the high 80's with high humidity today. I live in a house with little insulation (one of the dumbest things I have seen since in Texas since insulation works both ways) and have a black roof so it heats up in here real bad with the room temp generally hitting 80 F + everyday. They were out of the optional Zalman fans when I got my sink so I just tossed on a 80x25 43 CFM fan to try it. I was actually speaking of my CPU temp going up due to the airflow disruption from that fan I mounted on my vid sink. I have one of the Zalman slim fans ordered and now have no fan since the one I had on there was too much.
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Mt_GoatHead Cheezy KnobPflugerville (north of Austin)Icrontian
edited November 2003
DogSoldier had this to say mtgoat, that setup looks pretty strack. That must be close to 400grams hanging off the agp slot. How secure is it? I'm leaning toward Zalman and away from the Vantec Iceberq 4 pro.
Thanks for the info. I've read a few sites where they've had to refrigerate their cards before popping the HSF off, the thought of trying that scares me..lol Is your 9800 a Sapphire? Mines a Sapphy NP soft-modded to Pro. Just wondering if that makes any diff.
It is very secure and I am going for the Zalman fan as this one is too much. I had no problem removing the stock HS, then scrapped the residue off the core with a single edge razer blade as it was very hard. I have a built by ATI 9600 Pro so the Saphire might have a different thermal paste on it. I remeber freezing a Gegorce card years ago and it took 20 min in a plastic bag and I used a credit card to pry it off.
I had no problems removing my HSF from my gfx card either.
My GFX is a black PCB Sapphire Radeon 9700.
It had some sort of thick silver paste on the core.
It almost acted like glue but it was rather easy to remove.
I used alcohol to remove the paste and applied a thick layer of AS3.
I used the Zalman paste for the profile.
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Mt_GoatHead Cheezy KnobPflugerville (north of Austin)Icrontian
edited November 2003
I found my donor CPU HS for my NB and got it all cleaned up. All I need to do is make the hold down and get the screws, nuts and nylon washers.
John
I am going to move the backplate in question and the green chip is my onboard RAID and emits minimal heat. I also found what looks like an old GF2 passive HS for the SB that will fit perfect. I don't need to mess with my case as my sys temps are always no more than 1 degree C above ambient room temp. My prob was temporary due to the odd mid to high CFM fan blowing across the path of my airflow. I don't want any mose hole because I am trying to make it quieter and holes only increase noise. As I said it really ain't broke so I don't need to fix that part. Zalman OP-01 fan on order.
LeonardoWake up and smell the glaciersEagle River, AlaskaIcrontian
edited November 2003
I remember several discussions at more than one tech forum discussing the merits of heatsink cooling of southbridges. Bottom line - does your southbridge really need cooling? Desert it even get past the lukewarm level?
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Mt_GoatHead Cheezy KnobPflugerville (north of Austin)Icrontian
edited November 2003
It gets more than luke warm. I don't think I would want to keep my finger on it for very long. I recall that was a peculiar trait of NF2's in general, that they actually get warm, quite warm indeed. I know all my SIS, ALI and VIA south bridges never even flt like anything more than ambient.
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Geeky1University of the Pacific (Stockton, CA, USA)
edited November 2003
My southbridge gets really hot when the NF-7 it's in is overclocked really high. One of those generic green chipset heatsinks (anodized gold in my case... part of a Vantec Iceberq package) works for me.
mtgoat, let us know how that coolermaster thing does. I considered using it for my 9700, but I figured that since I already had an amd retail 'sink sitting around, I'd use it instead.
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LeonardoWake up and smell the glaciersEagle River, AlaskaIcrontian
I just ordered ten of these thanks to Leo's post in another thread... I'm going to try to fit them on the SBs of my NF2 boards, and see if they'd suffice for the NB on the AMD 761 and Via KT266 boards I've got.
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LeonardoWake up and smell the glaciersEagle River, AlaskaIcrontian
edited November 2003
Hope they work for you. You may have to use some creative engineering to mount them - but that's the fun of modding! If you don't see desired results, you can always mount a fan on it or next to it.
I'm trying to go with passive cooling wherever possible, so I'm putting a few of these on the NBs of all my NF2 boards. I saw a lot of talk when the NF2 chipset first came out about putting the stock NF2 NB cooler on the SB, well I figure the ones you referred to above are similar in size, and hopefully performance, to the stock NF2 NB cooler, and since I won't be epoxying my stock NB cooler to the SB, I can hold on to it if I ever need to RMA the board... the heatsinks from allelectronics have a thermal pad, which I'd use if I had to, but I'm trying to figure out how to get a not-quite-permanent bond by cutting my AS epoxy with thermal grease. The main difficulty with mounting those generic heatsinks to the SB will be that the SB is so much smaller!
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Mt_GoatHead Cheezy KnobPflugerville (north of Austin)Icrontian
edited November 2003
Rob
Those will work fine if you are using one of the SLK's on your CPU as the air coming off the overhanging portion of the fan provides quite a bit of cooling with one of those Zalman's.
I wish the NF7-S's had the holes next to the SB like the Epox boards did.
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LeonardoWake up and smell the glaciersEagle River, AlaskaIcrontian
edited November 2003
The perimeter dimensions of the heatsinks you ordered are similar in size to the NF7's (or other motherboards', for that matter) stock NB coolers. But the tall fins are wavy, providing much more surface area for heat transfer into the air. Most stock chipset heatsinks provide relatively little surface area, hence the need for buzzy little fans.
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Mt_GoatHead Cheezy KnobPflugerville (north of Austin)Icrontian
edited November 2003
Those that Leo posed look just like the original gold colored Zalman's except for the color and the mounting groove on the sides.
So you guys are saying that they should cool better than the stock NF2 NB cooler? Sweet! And yes, Larry, I do plan on putting them up with SLK series coolers on two boards, and an SK-7 on the other.
So do you guys think those black ones will be sufficient NB cooling without fans for the AMD761 and Via KT266 chipsets?
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LeonardoWake up and smell the glaciersEagle River, AlaskaIcrontian
edited November 2003
Will your new sinks perform as well as the stock NB cooler?
Depends:
If the airflow pattern in your case causes a dead spot by the northbridge, you may have to setup a small fan to move cool air to the NB area. I don't know if you will have enough clearance to mount those sinks on the NB. If those are the units I think they are, they are what I am using for my GPUs at 330/315 each - overclocked from 270/270. Overclocked GPUs get quite hot,; so yes, that's pretty good cooling.
Comments
First, increase the power of the back fans-- that will bend the airflow out the back. For even more bend, try increasing the input fans.
Second, If you do this and still have airflow\cooling issues, try to get a holesaw and make some side blowholes in LEFT side of case that start a bit down and toward HDs from where your RAM fan is (that sucker is a tib TOO big in diameter, and is bouncing air off the side of your case, and the turbulence of the ari bouncing back at the board is part of where your cooling problem is). DO NOT fan these holes, you want input venting there. Dust filters on inside of blowholes to keep dust out of case would be nice and even recommended.
John. (playing at HVAC engineering, know a couple down here, and they taught me convection calcualtions.)
Thanks for the info. I've read a few sites where they've had to refrigerate their cards before popping the HSF off, the thought of trying that scares me..lol Is your 9800 a Sapphire? Mines a Sapphy NP soft-modded to Pro. Just wondering if that makes any diff.
John.
Sounds like you have it under control. I wish I lived where it was cool. It's just going on 10 AM here and it is already 77 F outside and will get into the high 80's with high humidity today. I live in a house with little insulation (one of the dumbest things I have seen since in Texas since insulation works both ways) and have a black roof so it heats up in here real bad with the room temp generally hitting 80 F + everyday. They were out of the optional Zalman fans when I got my sink so I just tossed on a 80x25 43 CFM fan to try it. I was actually speaking of my CPU temp going up due to the airflow disruption from that fan I mounted on my vid sink. I have one of the Zalman slim fans ordered and now have no fan since the one I had on there was too much.
It is very secure and I am going for the Zalman fan as this one is too much. I had no problem removing the stock HS, then scrapped the residue off the core with a single edge razer blade as it was very hard. I have a built by ATI 9600 Pro so the Saphire might have a different thermal paste on it. I remeber freezing a Gegorce card years ago and it took 20 min in a plastic bag and I used a credit card to pry it off.
My GFX is a black PCB Sapphire Radeon 9700.
It had some sort of thick silver paste on the core.
It almost acted like glue but it was rather easy to remove.
I used alcohol to remove the paste and applied a thick layer of AS3.
I used the Zalman paste for the profile.
John
I am going to move the backplate in question and the green chip is my onboard RAID and emits minimal heat. I also found what looks like an old GF2 passive HS for the SB that will fit perfect. I don't need to mess with my case as my sys temps are always no more than 1 degree C above ambient room temp. My prob was temporary due to the odd mid to high CFM fan blowing across the path of my airflow. I don't want any mose hole because I am trying to make it quieter and holes only increase noise. As I said it really ain't broke so I don't need to fix that part. Zalman OP-01 fan on order.
mtgoat, let us know how that coolermaster thing does. I considered using it for my 9700, but I figured that since I already had an amd retail 'sink sitting around, I'd use it instead.
Those will work fine if you are using one of the SLK's on your CPU as the air coming off the overhanging portion of the fan provides quite a bit of cooling with one of those Zalman's.
I wish the NF7-S's had the holes next to the SB like the Epox boards did.
So do you guys think those black ones will be sufficient NB cooling without fans for the AMD761 and Via KT266 chipsets?
Depends:
If the airflow pattern in your case causes a dead spot by the northbridge, you may have to setup a small fan to move cool air to the NB area. I don't know if you will have enough clearance to mount those sinks on the NB. If those are the units I think they are, they are what I am using for my GPUs at 330/315 each - overclocked from 270/270. Overclocked GPUs get quite hot,; so yes, that's pretty good cooling.