X1900 and expansion slots fan

Hang in there with this one, it gets kinda long:
1) Bought X1900 for my dualcore 2.3, and the graphics kick butt!!! No way can I go back to the 6600.
2) It did make some annoying fan noises on startup, and also when launching games it would spool right up and then go back down. It does come up again but usually only under hard use so you're busy shooting or whatever (CoD, Doom3, Warbirds) and can't hear it much.
3) This is where it gets weird. I thought I'd try the artic cooling Accelero X2 cooler, supposed to be excellent and guys have used it on their mac pros with good results. Problem is, on G5, the cooler will interfere with the clear plastic air deflector in the recessed area.
So I made up a new deflector using lexan that didn't have the recessed area (ie, its flat), installed it and ran computer like that for a couple days. None of the temps changed (I suspect the recess on stock part is to force airflow through the 6600 cooling fins, the X1900 having its own fan/cooler does not require this).This new deflector allows the Artic X2 cooler to go in with no issues.
Today I installed the Artic X2 cooler, temps are the same and the noise is the same. Thats not right (look online for all the reviews including mac pros and temp drops and noise drops are huge) Then it hit me, the noisy fan is NOT just the 1900, it is the small fan at the front (hardware monitor calls it the "Expansion Slots Intake" fan). When you launch a game, it winds up to 3000rpm and that is causing the noise. So the question is, is there a quieter fan to put in there?
Also, I'm thinking this fan gets it speed from the slots power consumption, as they seem to match. The 6600 used to run at 65 degrees C all the time, the stock X1900 ran at 55 all the time, and still 55 with new cooler so there is no reason for that fan to spool up like that based on temps.I'm also thinking the graphics proc temp is a local sensor, not right off the card.
Thoughts on any of this? Sorry for the long post but it needed explaining. I'd like to quiet that fan down...

Not familiar with the dual-cores, but on the earlier G5s that fan (known to HM as the "PCI Slot Fan" on this Ancient DP2 G5) is controlled by the slot values, not by a temp sensor.
Some of the cooling kits for other cards, e.g. the Verax G03 on the 9800proSE, suggest that the fan with, presumably, relatively modest demands, pick up the power from the Molex connector for the optical drive. Don't think the reason was stated - but it was possibly that the increased power demand caused the "PCI Slot Fan/Expansion Slots Intake" fan to rev-up and cancel out the benefits of the new, quieter fan.
This is not much help with a variable-speed fan controlled by a temp sensor on the graphics card, which has to be plugged in to the card.
What speed/value did the "Expansion Slots Intake" fan run at with the 6600? With the 'standard' X1900?
It's running at 37% with an X800 (variable-speed card fan - plugged into card) on this Venerable DP2.
BTW The Service Manual is here
http://akserver.dyndns.org/macosx/hw/asm/PowerMac/PowerMac-G3-G4-G5/PowerMac-G5/ powermac_g5.pdf
but doesn't really cover this sort of thing.
Possibly you could contact Arctic for info on installing in a G5.

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First reset the System Management Controller…
http://docs.info.apple.com/article.html?artnum=304123
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I want to configure my PCIe slots to 8x 8x 1x 8x...
The reason for this is because I'm fitting an ATi X1900 with a passive cooler (Noise!), and it won't fit in the double-height slot.
All the info suggests running 8x v. 16x will make no difference: http://www.barefeats.com/quad14.html
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I don't want to have to re-install the whole OS just to get a working ESU...can I download a fresh one from anywhere?

I DID read your post:
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So is that now false?
I launched the copy that I have that I put in /Utilities and confirmed that it will launch and works fine.
Next, I checked and saw that there was an option when you launch it to "not show again" in the window.
There must be something wrong on your end. So don't tell me I didn't read your post (or Ned's) and I did see that you had it open in back. Couldn't tab to it.
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Message was edited by: The hatter

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Hi Guido, and a Warm Welcome to the Power Mac G5 Forum!
Assuming that you have made a visual (and aural (!)) check that it is definitely the fan at the front of the G5, in a combined housing with the puny internal speaker, that is making all the noise -
The units for "Slot combined" (as it's called on this venerable G5 DP2 running HM v. 4.1) are mentioned in the HM Help FAQ
"Why do the power sensors of the Power Mac G5 slots not carry a unit?
At this time we don't have enough data about these sensors. For this reason it is unknown in which unit the readings have to be interpreted. The readings could, for example, be interpreted as milliwatts. The sensors Slot 12V, Slot 3.3V and Slot 5V show the power load drawn by PCI cards for the respective voltages. The sensor Slot combined also includes the current power load by the SATA hard disks."
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Permissable to install PCI slot fan + another fan?

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Awaiting responses.

Japamac,
For someone who doesn't own a G5, you sure do know a lot about them So, you are advising me NOT to put in a PCI Slot fan and or take the smaller fan from my MDD and put it in the middle of the case for it to cool the video card? I was just concerned because I saw the GPU temp was over 160 degrees and the heatsink, though massive on the 6600 nvidia was kind of hot to touch. I would have thought by putting in a PCI Slot fan it would help to cool the GPU down. It does in fact cool it down tremendously.
Perhaps, I will remove the other smaller fan. What is the purpose of the air deflector shield? I never had one of those in my MDD before and its a first on the G5. I am aware that PCI isn't compatible with PCIe. The PCI Slot fan doesn't fit INTO the slot, but rather just connects to the bottom of the slot. I know. G5's are not forgiving. Just the slightest miscalculation and problems can occur.
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