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4870x2 - Will the PLX PCI-E Bridge need a waterblock?

Last response: in Overclocking
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July 18, 2008 11:31:03 AM

Question as per the topic title.

I am planning on building a new rig when the 4870x2 is released (maybe 2), with the intention of water cooling the system to get decent overclocking out of it.

I'm considering 2 loops from the offset, just because I heard these cards are monsters for heat production.

1st loop CPU (probably Q9550 @ 3.2 GHz) + 1st 4870x2
2nd loop Northbridge + 2nd 4870x2

My question is however, with each card needing 2 water blocks for the the GPUs alone, will the built in PCI-E bridge chip need a waterblock too? Will this even be affected by the overclocking? Will there be enough space to squeeze something in between the 2 GPUs with water blocks on them?

Cheers guys.
July 18, 2008 11:45:37 AM

No more so than any other crossfire setup so no. As for the OC, water cooling may buy you something on the GPU's but it will get very little in the way of CPU and chipset cooling. Water alone doesn't drop the temp enough get any additional headroom vs air with the current CPU/MB's out there.

Without knowing what type of block/s you would be using it's hard to say.
July 18, 2008 12:44:56 PM

And of course I meant Q9550 @ 3.4 GHz to start with not 3.2... that number was left over from my look at the cheaper Q9450 :p  Looking to creep it up towards 4GHz stability permitting.

Of course water drops the temp enough to do this, I don't really want to have something that sounds like a jet engine cooling the CPU and shifting the air inside the case so I can get more performance out of it.

Point is, normal crossfire setups don't have the plx chip, I'm talking about the x2 card, not 2 x the single gpu card.

I hadn't even investigated the exact water blocks yet, seems there's not much about for the 4870 either. So guess I'll wait for a full cover block, or a HIS card with water block as standard.
!