Z820 - Heatsinks and CPU's

[TheStrayCat]

I understand this has been asked a lot, but i feel the info on the board is a iittle muddled. 

I'm running a 2013 bootblock z820 on stock heat sinks and looking to see how far an upgrade i can do on the cpus. I was thinking of going to the 2695v2 (115w) or 2697v2 (130w)

Can someone please expain how many different OEM heatsinks types there are for JUST the Z820??

I was under the impression that there was just 2 main types - The stock heatsink that comes with the basic option which had 3 heat pipes that was good for <130w (That i understand may now be depreciated and any further replacements are a 4 heat cooler part also used in the z840 that is compatible with the z820?) 

And the other option was the liquid cooled option good for CPU's that are 130w or over.

Is this correct? Can i go to 2695v2 or 2697v2 on the stock cooling?

[DGroves]

the z820 and z840 share the same heatsink compatibility what works for one will work on the other

the stock heatsink is for the low power cpu's (under 95 watts)

not really available anymore has only two heatpipes instead of the three heatpipes the 130 watt cooler has

the upgraded heatsink is for cpu's up to 130 watts  (749598-001 or 782506-001)

the water-cooled heatsink is for the 150 watt cpu's  (G0J48AA or 635869-001) 

the z840 vapor chamber heatsink as noted above will also fit the z820 (HP Z Cooler N3R54AA)

this air cooler will easily handle 150 watt cpu's and unlike the hard to find "used" water cooled units they can be bought new

[TheStrayCat]

@DGroves - Thanks for the reply.

However i'm a little confused... I'm running the stock heatsinks i believe and both have 3 heat pipes... Pictures below of my actual heatsinks.

 

 

When i google your part numbers for the upgraded heatsinks (749598-001 or 782506-001) both heatsinks have 4 heat spreaders.. 

Can you confirm whether the heatsinks i have are 130w compliant??

[DGroves]

the 3 heatpipe coolers were the original HP designed ones for the z820 and they have a thicker base plate and are all silver

the heatpipes on this z820 unit may be thicker than the later 4 heatpipe unit from the z840, however I'm not positive on this

as i don't have one of each in front of me

however for the z840 HP made a 4 heatpipe unit that was equivalent in cooling to the z820 3 pipe

a easy way to determine the 4 pipe units from the z840 is those heatsinks are black not silver

HP started offering the newer 4 pipe black coolers once the older 3 pipe units were no longer in stock

for both z820's and z840's

 the 3/4 pipe coolers either will work with 130 watt or less cpu's although i suspect the 4 pipe ones may have slightly better thermal dissipation 

[TheStrayCat]

@DGroves - Thanks for confirming. So mine are the original 3 pipe versions and will work for up to 130w cpu's?