Pros: This heatsink is definately much better than the Intel fan that ships with the xeon 5450 cpu. I tested this heatsink also against Dynatron's all copper H6EG heatsink also for socket 771. The H46G kept the cpu about 8 C cooler at full cpu load than the H6EG, which only uses two heat pipes.

Cons: Included heat sink compound is not very good, so you should order some extra if you buy this heatsink

Overall Review: Running dual Xeon e5450 chips on supermicro mb.

Pros: Quieter than the stock aluminum HSFs for the 5410. Slightly better cooling even at the reduced noise levels.

Cons: Not 100% copper.

Overall Review: These were replacements for stock Intel HSF on 5410s. They mount up using the stock Harpertown backplate so you don't need to use the supplied backing. With the latest BIOS revisions running the PWM fans they rarely spool up. They also seem to have better response than the Intel PWM fans.

Pros: I am happy I purchased these fans. Noise level is not an issue unless your fans are over 80% duty. Install was easy as pie with included mounting brackets

Cons: Not a con for me, but if your motherboard does not have 4 pin power connectors I would not buy these. If you plug them into a 3 pin fan power connector they will run at 100% all the time and you'll be very unhappy with the noise. The 4 pin connectors can control fan speed based on temperature of the CPU.

Overall Review: As with anything, hit the manufacturers site and RTM (read the fricking manual) before you purchase products online.

Pros: Good solid cooler. does it's job.

Cons: not any quiter than stock Intel fans at low power setting

Overall Review: Perhaps these are quieter when on high, I have not tested them in this mode. They are just as noisy as the stock Intel on low setting, so they did not reduce the noise in my office as desired.

Pros: Finally I've solved my overheating problem. The fan has the coveted 4 wire connector which attaches to the motherboard. Meaning that the MB will control the fan speed. When things get hot, the fan speeds up. At normal operating speeds the fan is quiet.

Cons: At any RPM over 3000 the fan gets very loud. It becomes very annoying after only 30 minutes for me.

Overall Review: I have quad core Intel chips which have overheated under a heavy load since day 1. I was running the fancy dancy swiftech aluminum pin heatsinks. Turns out that I didn't really need new coolers, I needed a fan which has 4 wires, and has variable speed - controlled by the MB. I'm not talking about the 4 pin power wire which connects to power from the power supply. I mean the wire from this fan has 4 wires and connects to the MB.

Pros: * Nice fan, 4 pins which provides MOBO auto speed controls. Steer away from fan controllers and think twice if you are going to use it only for CPU fans. It is a 4 pin Fan and such in my case, NZXT Sentry comes with 3 pin attachment where there is no way to connect to the extent of my ability. And generally, it is not recommended to connect this to fan controllers due to battery issues with NZXT Sentry. Please read forums. The PWA Fan is connected to my MOBO wherein the BIOS setup allows auto speed control based on the onboard temp sensor feedback. Such a beautiful teamwork. So the stock fan generally works @ +/-2000 rpm and rarely jumps to levels of +/-3000 rpm in my case so full load 5500 rpm with 52dB is not the case for me. I can confidently say this fan is quite silent (may be max 32 dB) the way it works on my setup. * Copper base and alum. fins. Copper base is always better for heat transfer and the this heat sink surface is well smooth.

Cons: No cons yet. Perfect size for AC type heatsinks. It doesn't block air flow. In one of the previous reviews, it is recommended for a fan replacement with VANTEC Tornado and personally I do not see any point. That beast is nice too if you need a hair dryer noise at all times. Personally, I can not stand that!! and there is no way to calm that VANTEC Tornado Fan too...

Overall Review: INTEL XEON QC X5482 (3.20GHz/1600FSB/2x6MB) CPU, (1) Velociraptor WD300 GB, Kingston 16GB (2GBx8) FB-DIMM DDR2 800, NZXT SEN-001LX Fan/Temp Controller, TYAN S5397AG2NRF 771 Intel 5400, Edimax EW-7728In Wireless, Dynatron H46G CPU cooler, Asus Xonar DX 7.1, COOLMAX CUQ-1350B 1350W ATX 12V V2.2 / EPS PSU, LG W3000H-Bn, Arctic Silver 5 Therm Comp., Arctic Silver ACN-60ML (2-PC-SET) Thermal material Remover & Surface Purifier, ATI FireGL V8650 2.0 GB (4GB w/shared memo) Workstation Graphics Card, LG BlueRay BD-R/DVD/CD DL External

Pros: I also used these on dual Xeon E5410s in a Tyan S5396. Fits perfectly. I can't speak as to the cooling difference as I did not use the Xeon stock fans at all. I don't think these fans are loud at all. By far the loudest thing in this build is the XFX PVT88PYDD4...

Cons: Lost an egg because the thermal grease that comes with these coolers is absolutely terrible. If you buy these you will need to buy separate grease. The grease did not spread, it seemed very old. Ran to my local computer store and purchased an inexpensive grease that was 1000x better. Dynatron should watch this as its not hard or expensive to include better grease than what was shipped with these.

Overall Review: Dual Intel Xeon E5410 Harpertown 2.33GHz, TYAN S5396A2NRF Dual LGA 771 Intel 5400, 2x Kingston 4GB 240-Pin DDR2 FB-DIMM DDR2 667, Western Digital VelociRaptor WD3000GLFS , XFX PVT88PYDD4 GeForce 8800GT XXX 512MB, COOLER MASTER HAF 932 RC-932-KKN1-GP, SILVERSTONE DECATHLON DA850 850W, Western Digital Caviar Black WD5001AALS, LG 22X DVD±R DVD Burner, SYBA SD-PCXSA2-2E2R PCI-X, BYTECC PCIE 1394a + USB 2.0 Combo Card, EVERCOOL MNC-E Fans, 2x Dynatron H46G 77mm 2 Ball CPU Cooler, Scythe KM01-BK "KAZE MASTER" 5.25" Bay Fan Controller, Microsoft Windows Vista Ultimate SP1 64-bit

Pros: Keeps my dual Xeon Quad Core E5345's very cool and runs very quiet. Easy to install. Rock Solid !

Cons: No issues. No complaints

Overall Review: I think others have had issues with the coolers being loud because of the motherboard specs. I'm running a Tyan Motherboard S5396. Works great.