First off, I will say that I've been hunting for the perfect heatsink for about 6 months. Anyone who owns a Thermaltake Armor A30 Micro-ATX and Mini-ITX Mobile Portable LANparty Gaming Case 230MM Oversized LED Fan Long with Graphic Card Support VM70001W2Z
case can attest the clearance provided underneath the power supply is limited in an otherwise well laid out case.
This heatsink fits (in two fan mode) within that clearance, with about 4-5mm to spare. This minimal clearance will require you to have a power supply with a large enough fan on the bottom to provide adequate airflow to the processor fan. This is not optimal if your PSU generates a lot of heat. I would highly recommend a very efficient PSU to accommodate this.
EDIT:: Wanted to add, this requires reversing your PSU fans as well. Even with them pulling opposite direction though, the performance was not bad at all.
Case: Thermaltake Armor A30
PSU: Corsair HX750W
GPU: MSI GTX580 Lightning
CPU: Intel i7-2600K
RAM: G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 1866
Motherboard: ASUS Maximus IV Gene-Z LGA1155 Z68 ROG
HDD: Adata S511 120GB SSD
Optical: Sony BWU-500S BD Burner
Mounted in setup #1, left to right, with heatpipes on the left(while facing the front of the case) drawing the heat away from my GPU backplate.
Using provided Noctua Thermal Compound using 5 dot method.
Not using provided low noise cables.
If you want scientific results, there are a dozen reviews up on websites across the net. Battlefield 3 was the reason I got this cooler, so I will share my results running that program.
With Stock Intel Cooler:
~ 35 degrees Idle at peak
~ 85 degrees running Battlefield 3 on High/Ultra settings.
With the Noctua Cooler:
~ 27 degrees Idle at peak
~ 63 degrees running Battlefield 3 on High/Ultra settings.
Ambient noise coming from the case during Idle or Mildly CPU intensive tasks is noticeably greater, but not annoyingly so.
Things to Note:
This was my first Noctua heatsink and I am more impressed than I can even begin to explain. The attention to detail is greatly noticed. The provided thermal compound, as per a few review websites that I have seen, stated this is better than AS5 in most tests. Whether that claim is true or not is not known by me, but I will say it does the job. And they include enough for at least 2 applications. I know this because I screwed up accidentally and got a cotton fiber stuck in the first attempt and had to reapply. The plethora of cables included are all mesh covered with heatshrink. The mounting system is one of the best I've seen. Engineered to be easy to install while incredibly versatile with a number of parts for a broad range of cpu sockets and motherboard types. It even has a contingency setup for motherboards with capacitors protruding from the bottom of the motherboard near the backing plate (such as some ITX motherboards). The packaging is well laid out and protects the product well. The heatsink itself is beautifully crafted and the fans are of high quality. The 6 year warranty alone speaks volumes for their faith in their product.