865PE chipset with zalman NB heatsink

je_zza · Post by **je_zza** » Thu Jan 29, 2004 7:54 pm

I have recently built my first silent PC - chose all components from the ground up:

Sonata Case
P4 2.6C (which i have undervolted to 1.3Vcore and tested stable for 12 hours with Prime95!) stock cooler
Gigabyte 8IPE1000 Pro 2 MB
Powercolor 9600 Pro
2 x GEIL 512mb PC3200
Seagate 7200.7 120GB SATA

The original config had 5 fans - 120mm on case fan connector, PSU fan, CPU, graphics and NB

The 2 loudest fans i always planned for change to passive heatsinks - which i have now done - with the ZM-NB47J on the northbrige chip and the heatpipe HP80C on the 9600 pro

The heatpipe is fantastic, but i am worried that the zalman NB does not provide enough cooling - even with the 120mm case fan near by - as it is hot to the touch when the computer is idle. The gigabyte board has their special CIA (CPU intelligent accelerator) and MIB (memory intelligent booster). Apparently they have pretty much enabled PAT on the 865 and effectively are overclocking this chip.

Does anyone have experience with the 865PE being passively cooled which is on a board that has some kind of inbuilt overclocking mechanism?

PS this seems really silly that the hottest thing in my case is the NB!

Post by **Ralf Hutter** » Fri Jan 30, 2004 5:34 am

I'm running an Asus P4P800-D 865PE board which uses a stock passive NB heatsink that looks fairly wimpy compared to the NB47J. It runs fine with Asus' version of PAT (called MAM, IIRC) enabled. It also runs fine if I OC it to 250MHz. The NB HS runs fairly warm but not really what I'd consider as "hot". You can certainly hold your fingers on it, even while the CPU is under full load.

If your Zalman is hot, that's probably a good thing. Means you're transferring the heat from your NB to the air via the NB47J. Is your system unstable or something? If it's not, I wouldn't worry about it.

Inexplicable · Post by **Inexplicable** » Fri Jan 30, 2004 8:52 am

According to the Intel thermal specifications, the thermal range for the northbridge extends to 99C. If your system is stable I wouldn't worry about it.

Storm · Post by **Storm** » Fri Jan 30, 2004 10:49 am

Dont worry about it i have the same mobo and a zalman NB sink, and my computer is 100% stable, check my sig

GA-8IPE1000 Pro ZM-NB47J

je_zza · Post by **je_zza** » Sun Feb 01, 2004 4:27 am

Thanks for the info

I had a strange crash the other day when strange things appeared on the screen. I turned my comptuer off and let it cool down and hasn't happened since. Will see how stable my computer is over next few weeks, I think it will be fine though.

boe · Post by **boe** » Sun Feb 15, 2004 9:15 am

Has anyone tried the ZM-NB32J with the MSI NEO2 FIS2R?

kremb · Post by **kremb** » Fri May 06, 2005 11:58 pm

ga-8ipe1000-g p4 prescott HT 3ghz

I have my FSB at 133 for cpu at 2ghz

voltage at .875

seems stable, ran some cpuburn for a half hour while surfing.

Is this going to save me much actual electricity?

for me 2ghz is enough, especially if I can use a passive heatsink.

my temp with stock fansink is 32c.

is there something I am missing? are there(more) optimal fsb/voltage settings for this cpu on this board? Am I dreaming to be able to go silent without liquid cooling?

kremb · Post by **kremb** » Tue May 10, 2005 8:31 am

so I went with a thermaltake silent tower heat sink and have disabled the fan.

http://www.thermaltake.com/coolers/cl-p ... tTower.htm

(3ghz HT underclocked to 2 ghz , voltage .875A )

I still get 32c at idle and 42c at full load. I still have fans on the power supply though that I'm not too happy about but I realize I DO need the air flow.

All I really want is one super quiet fan to pull air out of the top of the tower, then I'd be happy.

BenW · Post by **BenW** » Tue May 10, 2005 8:41 am

I have Gigabyte's GA-8IPE1000 Pro-G which comes with a passive heatsink as standard. This board also has MIB and CIA but having said that the heatsink is only warm/getting to hot to touch, nothing like too hot to touch

kremb · Post by **kremb** » Wed May 11, 2005 4:14 pm

I am fairly happy with my results.

I have one(120mm) fan on a voltage control pushing air up and out of the power supply.

I actually put the fan inside the power supply and taped up open front to draw air from the heatsink below/beside.

I put the HD on an old T-Shirt at the bottom of the case.

I can harly hear a thing. Pretty happy.

The cpu temp seems stable at 35c

I have to say I'm pretty impressed with myself for getting this going under $100 CDN.

P4 prescott(3ghz) running at 2ghz with just the one voltage controlled fan sucking air out through the PSupply.

Let's hope that T-shirt doesn't catch fire.