Another dead DDC 3.25 ?

[jayhall0315]

Any more details as to what was being run in the loop (High restriction/low restriction, single or series pumps, which top exactly, air ventilation..)?

I trust my DDC3.2s every bit as much as my D5, although I only run one per loop and they have had a fair amount of restriction.

I've also been running mine with an XPSC standard top, no problems here.

I have seen a few tops (if put on just right) actually impact the impeller. There is enough play in most aftermarket tops, that it's easy enough to do if you slide the pump over before tightening. Also some tops with their exit hole drilled slightly misaligned tend to make the impeller run off axis and that "Off-axis" operation seems to change with restriction.

I guess the only thing that's of any concern to me is that some of these bay type reservoirs don't seem to provide much ventilation to the pump housing. I know 90% of the heat is dumping in the coolant, but they do still get pretty warm on the base.

Also on the failed pumps, did you find any evidence of failure (burnt electronics?)

It was hooked to the bottom left side of the XSPC dual DDC reservoir (for two loops) Martinm. I followed the XSPC installation instructions to the letter,.... the o-ring and pump tightened by the four bolts with a gentle torquing down in a cross pattern. The loop was entirely distilled water 100% and nothing else (no dies or additives). I can say Martinm, that in the bleeding process, this pump acted irregularly and it is above the water line that it is cooling (which is the two ATI 5870 cards). The bottom of the DDC dual reservoir (which the 3.25 mounts to) seems fine to me when measured by the calipers. It also worked fine for almost two weeks and then bang... now when dried it has a really wonky spin cycle. I will check the electronics for you later tonight.

Its been more than 30 days since I ordered this from Performance PCs, so I assume I have to send this back to Laing directly ?