PC Hardware Buyer's Guide - March 2010

Folding Rig

Since we've educated you all in what makes the perfect folding farm, we've twisted James' arm and got the in-house guru's help to spec this month's dedicated folding rig.

We can still buy the four GeForce GTS 250s and the price-for-ppd output is excellent. They are perfect for either getting started with a couple or adding to a farm that needs to grow. And don't forget... every farm needs to grow!

The Athlon II X2 240 is sufficient enough to drive data to all four cards - the CPU doesn't need to do that much in reality, and if you're looking for something slightly lower wattage (remember it won't be at full load, so not reaching the TDP) then you can pay more for a Athlon II X2 240e.

Dropping this all into our favoured MSI 790FX-GD70 and it becomes a reliable backbone to the farm which has heavy power demands and PCI-Express loads. It's not cheap, but it's worth it.


2GB of the best value branded memory you can find will suffice. There's no extra performance needed here so cheap and cheerful will work fine- we've included a single 2GB DIMM of 1,333MHz DDR3 memory since 1,066MHz is no longer being sold in most places.


We've forgone the case too, because it's almost impossible to find one that fits four, dual slot graphics cards in, and in its place we've opted for just a simple solution: one huge fan. Sit the 200mm Antec Big Boy on top of the graphics cards and it should stop them roasting to an early death. We've used this setup in our own labs with seven 9600GTs in a single Asus X58 WS motherboard and it's worked perfectly and continuously for several months. If you do have a case to recommend us, please let us know though!


A cheap 160-250GB hard drive from the usual suspects will suffice for an OS since not much storage is needed - simply the OS and small Folding programs are needed. If you can secure a very small and cheap SSD - even if it's not fast - that will reduce the power use of the system.

We've opted for the Corsair TX750W as power provider however the Seasonic X-750W will be more efficient for its 80Plus Gold rating so it's really worth considering. For the £45 price difference, that's half way to another graphics card though. Efficiency and reliability should certainly be considered though, because since the system is sitting all day every day at full load, it will rack up the savings on the electricity bill.


Finally, drop on the same Akasa AK-876 or Arctic Cooling Freezer 64 Pro that we also used in the Affordable All Rounder PC, and there's ample, quiet cooling here too. If you want to save a few bucks and considering the noise of four graphics cards under load - the stock AMD cooler will suffice.