Chewing gum?  I don't why yours is that thick.  I use MX-2 all the time (prefer it over AS5 which is thicker).  I wouldn't mind trying MX-4 if it weren't 2-3x more expensive.

If you're getting 225 Mh/s then it's mining off the 6870.  The APU (6530D) gets about 41 Mh/s depending on how it's configured.

It's only needed at stock where you might need to go beyond the rated TDP.  But if you're overclocking keep it at 0% and adjust your voltages if needed.

FYI, EK does the same thing.  Not a big deal for me and I've done quite a few waterblocks.  The thing that drove me nuts though, was when EK didn't use spacers etched in the waterblock.  You had to get a small amount of TIM and use that to stick to the block and hope that it doesn't move when you attach it to your card.  Thankfully they learned with their latest series (HD 7xxx & GTX 6xx) and applied the spacers within the block.

Tell that to MSI.  I had to clean off the TIM on all my MSI 7xxx cards because they put way too much.  Plus I like MX-2 and had a bunch left over.   

I'd expect a 850w should easily power all four.  Like Lethos mentioned, you'll run into a limit on how many available PCIe cables you can use from your PSU since most have up to six 6+2.  Currently, the Antec TPQ-1200 OC is the best valued PSU you can get right now.  It's on sale at NCIXUS for $120.

Or you could just remove the bracket entirely.  But sometimes that logic doesn't apply here anyways.   

Bugger...

Have you tried going back to an earlier version of MSI AB?  2.2.1 should work irregardless.

ragingazn, try this that I suggested in your PM:

http://www.sendspace.com/file/r7jys0

You will need to restart after it finishes.

Newegg, open box.  I don't factor the price that heavily when I'll be selling it later in a few months.  I know AMD does price drops and technology does get cheaper but I highly doubt it (or other recent cards for that matter) would drop more than 20%.

I paid $160 for it.

Just hooked up my watt meter and after factoring in efficiency and board/CPU power, I'm getting about 55w @ 1130/200.  My 7850 is better though, 313 Mh/s @ 75w (1050/200).

I'll have to hook up my watt meter to the rig but I'm pretty sure it's around 60w (or less).  All of my 7xxx cards do 3MH/w or better.

@ 1130/200, I get 207MH/s.

It's very similar to a 5770 but uses less power.

For powering graphics cards, CPUs, fans, etc.  The reason why some may need a Molex or external power connector with their extender is because the 24-pin ATX connector can only supply so much current before something like this happens.  If you're populating a bunch of PCI-Express slots and/or using power hungry cards (ex: 5970), then it would be advise to do this mod.

I would definitely recommend you getting that particular cable from BestDealUSA.  I bought a few from that seller and had nothing but good experiences.  Top notch cables, great prices, and shipped very quickly.

A 1kW should easily power all that.  The problem is that Coolmax is just crap.  I bought one years ago when I first started getting into building computers.  Huge mistake.  It died after a few months and the replacement wasn't any better.

Look for a higher quality PSU from Antec, Corsair, Seasonic, Enermax, Thermaltake, OCZ, XFX, or Rosewill.  I actually think your PSU isn't continuous at 1000w, more like that is its max power.  Yikes.

Edit:

Found an Antec TPQ-1200 OC for $129.99 at NCIXUS.  Damn good deal for a reliable PSU.  I have 3 myself. 

Sounds like the same issue this guy ran into.  Turns out that one of the PCIe x1 slots gets disabled when an adjacent one is occupied.  Try asking ASRock whether or not all slots can be filled.

What motherboard are you using?

http://www.msi.com/product/vga/R7950-Twin-Frozr-3GD5-OC.html

The reason why they're so hot is because your Accelero is blowing hot air passed by the fins onto them.  By removing that it won't be as hot - hence my solution. 

Just using some spare 92mm fans for the cards and a 120mm fan on the bench setup.  The 7870 doesn't have any heatsinks on the MOSFETs and the 7950 already had a metal plate installed over the power circuity.

The 7870 doesn't have any monitoring for the VRMs but with the 7950 it is usually about 72°C versus 86°C before.  The GPU dropped quite a bit - on the 7870 it went from 73°C down to 44°C and the 7950 went from 82°C down to 47°C.

The one on the left is a Thermaltake WATER2.0 Performer and WATER2.0 Pro on the right.  They're very similar to the Antec H20 Kuhler series which all share the same OEM, Asetek.  On my bench, I'm using the Performer for my 7950 and it cools adequately (GPU: 55°C / VRM: 71°C).