OCing the Parhelia yet??????

[GT98]

The other problem too is that how are you going to attach the thing to the GPU? Maybe we'll see an aftermarket company do a custom heatsink for the P.

[gt40]

pretty interesting cooler cheesekeep
however some of us have all our pci slots used, so
having a deep heatsink/fan combo is not an option.
me thinks when i do finally get my parhelia a custom one is in order - possbly even one that wraps around the card to use that free space on the other side of the agp slot.
hehe - I'll swap someone a custom cooler for a parhelia

[gt40]

for attaching to cpu - have a look at double sided adhesive backed heatsink pads. these are pretty sticky and usually need to pry these apart to remove them. (this would be especially useful on the memory chips)

[Ryu Connor]

Zip ties through the heatsink and the holes on the card should work well also. Not real professional looking I suppose, but it should hold with enough force and it will be much easier to remove at a later time.

[Cheesekeeper]

The picture of the Leadtek card higher up is a standard shipping Leadtek Geforce4, in which the dual-fan cooler covers both the front and back of the board. This was custom made by Leadtek for their board - it's a shame Matrox didn't use a more imaginative solution like this rather than resorting to a tiny cooler and lowered clock speed. The Leadtek board fits happily into a normal AGP slot, and doesn't affect the adjacent slots. Of course, whether or not this would provide sufficient cooling for the Parhelia is another matter........

[Ryu Connor]

There is of course a less extreme, yet equally effective method to cool the card.

http://www.thecardcooler.com/shopcart/CardCoolers/CardCoolers.html

You could just leave the stock heatsink on.

[Cheesekeeper]

This is true, but based on the performance of CPU coolers, even attaching Harrier engine to the card probably wouldn't make much difference if the heatsink isn't up to the task. In a number of Dan's reviews, he has tried hooking up beefier-than-standard fans to coolers, and in many cases recorded little to no change. I suspect that the heatsink on shipping Parhelia cards wouldn't have the surface area needed to benefit much from extra airflow. Of course if I'm wrong, it would make things a hell of lot simpler

[Ryu Connor]

http://forum.matrox.com/mgaforum/Forum8/HTML/001314.html

Hi,
adding a larger HSF will give you maybe a 20MHz increase in clocks.

If you want to get a bigger boost, you would have to increase our core voltage, which I can't get into on how to do that.

If you do manage to do this, it will violate spec and also reduce the life expectancy of the chip.

------------------
Haig
Matrox Graphics
Technical Support Manager

[CHHAS]

Try to keep out of the headlines Cheesekeeper

[e-Pit@m]

Originally posted by Ryu Connor
There is of course a less extreme, yet equally effective method to cool the card.

http://www.thecardcooler.com/shopcart/CardCoolers/CardCoolers.html

You could just leave the stock heatsink on.

It won't do a lot is you've got a good circulation inside the case.
What you really should consider is take some nich alu. (copper will be just too heavy) .. heatsink, with lot's of fins (not rows..) for bigger surface to diss, heat.
next it will need to be lapped. drilled to align with the P holes..
and attach it with the default h/sf clips (if they won't take it try to use zip ties).
and put some nich low profile quiet 60mm fan.
And for the magic DDR-SG-RAM use this: http://www.nvnews.net/reviews/rev4_ramsinks/index.shtml
this new version is really nice, 20% more surface area.. copper made, and protective (from oxi) chrome-like finish.

[Cheesekeeper]

True, the weight of the copper could be a real problem. So maybe:


(sorry about the big posts!)
That's the Bitspower NP15S, which is the Aluminium version of the one above. Unfortunately, its performance is nowhere near that of the copper version. I've have really good experiences with Bitspower coolers in the past. I'm using one of their full-sized units in my server machine, which is keeping an AthlonXP 1500+ cool with its 60mm fan turned down to 5V. Airflow is almost nil (as is noise), but the Bitspower still outperforms a larger Tiger cooler with a screaming 80mm fan.........

[MrGaribaldi]

Originally posted by Cheesekeeper
True, the weight of the copper could be a real problem.

That's the Bitspower NP15S, which is the Aluminium version of the one above. Unfortunately, its performance is nowhere near that of the copper version.

Depending on how you mount it, you shouldn't have too much trouble using copper...

But the real Q now imo, is what hsf will be sufficient for the 20Mhz increase which is possible?
I don't want to spend 50$ on a cooler, when one to 20$ would suffice...

[e-Pit@m]

Originally posted by MrGaribaldi


Depending on how you mount it, you shouldn't have too much trouble using copper...
suffice...

Of course it will, Have you ever tried a Copper CPU Rack hs/f?
The weight way to much for any card to handle.

And I'm not going to make bunjee ties in my case to help it.


Alu will be very good as long as it will have enough Surface area.

[Ryu Connor]

Given Haig's info, it seems very unlikely that the core or mem clock of the 256MB model of Parhelia will be any different from the current version. It is also unlikely that a MAX version of Parhelia will be released.

[Cheesekeeper]

Originally posted by Ryu Connor
Given Haig's info, it seems very unlikely that the core or mem clock of the 256MB model of Parhelia will be any different from the current version. It is also unlikely that a MAX version of Parhelia will be released.

That certainly sounds right, unless their yeilds improve considerably within a short time. It's a long-shot, but it has happened before........