Copper Heatsink K129 for Intel Xeon3400 1U LGA1156 Lynnfield Retail

I have this on an i7-4785T with an Asus H97-Plus ITX motherboard. Also have a case fan nearby controlled by CPU temp, and with this Asus board the fan almost never turns on. I set the threshold temperature to 55C. The i7-4785T is a 35W CPU. At 100% load, the fans will spin, but normal usage the system is silent (up to around 60-70% load depending upon ambient temperature). The Asus board I'm using is also worth a look for anyone attempting a semi-fanless configuration. This cooler would probably be fine for 65W and lower. If I was using a K series, I might underclock a bit (or add a fan) to keep temps down.

Engineered incorrectly. Maybe old school in the traditional way of attaching from the top to the brackets. The screws from the Heatsink won't attach to the bracket. It was impossible as you would have to push "hard!!!" Bought the Noctua NH-L9i and "Voila!" screws attached from the underneath the motherboard and fits correctly.

This has some heft, and is well manufactured. I needed to replace the stock cooling assembly on an old TS140 Mainboard transplanted into a 2U case and upgraded the CPU to a Xeon E3-1246 v3. Stock cooler would cause the Xeon to thermally throttle after 2 minutes of Prime95, this one can run continuously on Prime95 without throttling. I do run an 80mm fan on the heatsink (bracket/screw mod). This is an LGA1150 socket system.

Fantastic heatsink for a 1u server. I have this on top of an E3-1225v3 chip (84w TDP) in a 1u Supermicro case. At a forced 100% load and with 4x 40mm fans blowing, it runs a steady 65*C.Just a note, the fins are a bit curved by design... just keep that in mind when you open it that it's not a defect.

This cannot cool down a 65w TDP cpu, the temps would jump to 70C+ with just 4% CPU usage. This was with i3-8300, and I shudder to think what would happen with I5/i7.Not worth the money if you are targeting 65w TDP.

It works on my G630T and made it an extremely quiet setup.I only had to run 1 case fan (80mm) and strategically placed the case to cool it down even in full load.It will run a bit warm (~50 degree C, 70 when full load) though. Expected from passive cooling.

I installed this in a very short Supermicro 1U server and it mounted right up and looks great. I haven't tracked CPU temperatures but it seems to be working fine. The unit is reasonably heavy and feels like a substantial chunk of copper, just like I would expect.

No complaints. I'm using it with a Pentium G3470, socket 1150 board.