I currently have this old fella cooling my e8400 oc'd @4.05gz with 1.35vcore http://www.newegg.com/Product/Product.aspx?Item=N82E168...
My room temp is 72 right now and they idle 28c & 35c,with Orthos running on both cores they hit 53c & 54c.
So do you think its good enough to maintain an OC of about 4.6gz with the 2500k.
If you're wondering,yes I had to order a new bracket for it to fit on the 1155 socket.
While I love my 9700 (non NT mines all copper), I don't know for sure if it could keep SB cool enough at those speeds. Hope someone does a test on them since a LGA1156 bracket should fit LGA1155 with no problems.
I'm on 775,so yeah,I need that bracket.
I read some reviews and even saw a clip on youtube with these chips overclocking to 5gz on air.
So I think they stay cool enough for this Zalmen to maintain the OC I want.