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Old 24th July, 2003, 05:06 AM
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8RGA+ Northbridge Mod results

Hi guys-

I just changed the cooling on my Northbridge on my 8RGA+ board and figured I would share the results for anyone interested or thinking about doing something similiar. I should start by saying my combination of my particular AMD 2500 Barton and 8RGA+ did not yield spectacular overclocking to begin with but I am pretty happy at this point with my results for this specific cpu (guess you can't get a great oc chip in every order...anyways)....

Here is my system setup:

AMD 2500 Barton
512 MB Mushkin 3200 low latency (2x256MB running dual channel with 11-2-2-2 timings)
8RGA+ mobo with jclk jumper removed
Sparkle 400 watt power supply
Alpha 8045 Heatsink with Delta 80mm
Sapphire Radeon 9500 Pro overclocked 352 core / 303 memory
Most recent official 8rga+ bios

Anyways, with the stock Northbridge heatsink, I was unable to get above 202mhz on the FSB. I was running at 202x10.5 (2121mhz) completely stable but unable to get any higher on the FSB so I decided to put some active cooling on there.

Although it wasn't the most inexpensive solution, I took the lazy way out and decided to give the "Northpole northbridge cooler set" a shot. It is a copper heatsink (fins) sized for the northbridge with a 40mm fan attached that is powered directly by the motherboard. It also came with a bunch of small aluminum heatsinks with adhesive which I attached to my MOSFETs (damn those suckers get hot even with the sinks). Anyways, it is a nice little package overall. Upon pulling the standard heatsink off, you really can see why you probably want to switch it out if you're overclocking. All it is attached with is the cheapo thermal pad (which doesn't come close to covering the surface of the northbridge). I'm not knocking Epox, I'm sure it's adequate for running stock specs, just not hardcore ocing. I did not lap the chip, but I put a generous quantity of arctic silver on there after scraping off some leftover pad.

Ok, now for the results. I am very happy with how things worked out. I realize these aren't killer for some of you, but it was a big improvement for me.

I am now running my FSB stable at 219 mhz after the mod. That's a 17 mhz increase (34 mhz overall). I am running at 10x219 now with my RAM synched in dual channel mode with the same tight timings (11-2-2-2), so even though my overall speed in mhz didn't go up much, I got a big increase in memory scores and FSB in general. The mod was easy and in my opinion well worth it. I just figured I'd share my experience and maybe encourage anyone else considering it to give it a shot.
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8RGA+ Northbridge Mod results-overclock.jpg  
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Last edited by William_Lee; 24th July, 2003 at 05:20 AM.
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Old 24th July, 2003, 10:41 AM
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Good Job!
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Abit NF7-S rev 2.0 Barton 2500 AQZFA0340SPMW 11 x 214
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Old 24th July, 2003, 04:01 PM
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"Northpole northbridge cooler set" Where did you get that from? I'm just about to disect a old aluminium heatsin of a Cele 300a!
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Old 24th July, 2003, 09:04 PM
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I have a similar situation, so I bought a crystal orb cooler for the northbridge. But, the fan is too noisey so I haven't installed it.

What's the northpole cooler like on noise levels?
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Old 25th July, 2003, 03:43 AM
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Quote:
Originally Posted by bradmax57
"Northpole northbridge cooler set" Where did you get that from? I'm just about to disect a old aluminium heatsin of a Cele 300a!
I got mine at http://www.sidewindercomputers.com.

For the guy who asked about the sound level...I can't hear it at all because of the two Delta 80 mms roaring away , but it is rated at 27.5 dB according to the included specs.
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Old 25th July, 2003, 04:54 AM
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I almost bought one of those Northpole sets until I realized that it is 71mm tall (heatsink+shroud +fan), you can't use that at the same time as a Zalman or an SLK900u. I made a home made Northbridge cooler out of an old Pentium 1 heatsink and attached a modded fan that works great but is a tight fit.
Added mods to my mods
It is about 40mm tall.
Bob
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