Opteron 146 Heatsink requirements

[BUFF]

Uncompatible with all DFI NF4 lanparty. It blocks the first PCI-E slot so no SLi.

Even the SI-120? (just looked on DFI-street & there is at least 1 guy running 2xgfx in SLI on a DFI SLI-DR with an SI-120)
Apparently the XP-120 is OK on the Expert.

[Dark Horse]

Uncompatible with all DFI NF4 lanparty. It blocks the first PCI-E slot so no SLi.

Am presuming you mean the XP-120?

No it actually works fits and works well unless you want SLI or have memory with a fat ass heatsink on it...neither of which are essential

From thermalright website:

DFI
LANPARTY UT NF4 SLI-DR Expert Okay

LANPARTY UT nF4 The first of PCI-e slots will be blocked by the heat pipe loop and the over-hanging fins will be in the way of the memory modules if they have the heat spreader/sink installed.

LANPARTY UT nF4 Ultra-D First PCI-e slot blocked by Heatpiples

LAN PARTY UT nF3 250Gb Okay

About the SI-120:

AMD socket 754/939/940 platform

SI-120 is designed to fit all AMD socket 754/939/940 motherboards (*Gigabyte K8 motherboards see below). The only motherboard issue we have found so far is with Chaintech VNF4 Ultra s939 as one of the capacitors gets in the way of the wire clip to lock into the RM. If you've found any, we would appreciate if you could report them to here.

I would personally recommend the XP-90 as has full compatability and is only 1-2c less effective for much less.

[sawyen]

And there's always XP-90C if you'd go the distance..