I tried it out for 24 hours with about 460 kH/s.  The indicated per-share rate for most shares was ridiculously low (a handful of satoshis).  The shares completed indicated on their website appears to have a somewhat loose relation to shares reported completed by my miners. Combine those with a lack of an official presence here or in the Litecoin forum...at this point, I'm inclined to cut my losses and switch to another pool.

Three days ago I called that BTC would plummet for a few days due to more ASIC's starting to ship. Guess I was right 

There is also the aspect of relative value - LTC is staying relatively more valuable (on a mining basis) than BTC, while FTC and, to a lesser degree MNC, has skyrocketed.  See - http://www.coinchoose.com/

Cable isn't a problem. According to the electrical engineering site here: http://www.rbeelectronics.com/wtable.htm - for cable runs of less than 3 feet (OK for GPU connections, surely), with 12V supply, 18 AWG is the recommended gauge for up to 40A or 240W. If you're using 16 AWG, that's the recommendation for 50A / 300W.

So according to this, the *cable* itself is good enough to supply an entire 5850 with ONE yellow wire and ONE black wire... and these are the 'recommended' gauges so I doubt the cable would ever get hot.

I've tried some rather dodgy practices in the past and never come across hot cables, except where a GPU was blowing its hot exhaust air onto the cable. Pure resistive heating? Not really ever seen a problem (other than my 10A rated 240V extension lead powering the Shelf Rig at 2.5 kW and getting VERY hot).

The problem seems to be with the connectors. As plastic says, the single Molex -> 6-pin connectors are very common and still supplied with many new cards. Even quality stuff like my Asus DirectCU II 6950s.

I suppose it depends completely on the thickness of the pins inside the Molex connector. As P4man demonstrated, the cables weren't at fault, but the crimping point between the cable and the Molex connector. If all Molex pins are the same, then there could be a problem... but if the GPU-supplied Molex plugs have thicker, uprated crimped connectors then things should be OK.

Personally I **much** prefer to use 6-pin Y-splitters, and power any twin-6-pin GPU using one 6-pin output from the PSU. The connectors themselves are rated higher than the Molex and, as pointed out above, the wire itself is NOT a problem. So every single card I use is powered from one 6-pin PSU cable, with a Y-splitter attached. Not had any problems yet.

However I will definitely test for hot connectors - since the cables shouldn't have a problem with 200-odd W, they won't get hot, but the plastic connectors most certainly can if not rated for 20-40A.

Will donate my first LTC To whoever figures this out!!

for BTC: (over 350 MH/s)
--gpu-memclock 300 --gpu-engine 950

for LTC: (over 350 kh/s)
--scrypt --thread-concurrency 7200 --gpu-memclock 1250 --gpu-engine 930

these are obviously overclocked, but they are stable for me without any voltage modifications. your mileage may vary.

Hi
I don't have a 5870 but my 5830 with motherboard and sempron 145, eats 200W (with a 80+ Bronze PSU) measured at the power socket. (about 50W is what the motherboard and processor eats so the card is around  150W in LTC mining 100% load, stock clock).

I've consistently seen ~425 MH/s with my 5870s of various makes (Ref and non-ref)