CPU and core temps VASTLY different: common?

[Queek]

So I don't have any experience with haswell overclocking, but I'm building a computer for a friend and agreed that I would have a go at overclocking it before I passed it on.  

The thing that's confusing me is that my CPU temps and core temps are hugely different.  For example, trying to run AIDA64 stress test gets the cpu up to a reported 52C, yet the core temperatures are reading 99,100,97,96C max (cool your britches, yes I stopped the test as soon as I saw that).  

 

I knew that the CPU temp is generally untrustworthy, but I had no idea it was THIS far off.  Is this a normal occurrance?  I've overclocked three different X79 systems with 3930k's, and I've never run into such an enormous difference before.  

 

I feel like I need to check the cpu block mounting this is so hot.  

 

Feedback is appreciated

 

Specs FYI:

ASUS Z87-k (bios 1302)

i5 4670k

Kingston HyperX KHX1600C10D3/8GX (one kit)

Intel 530 120GB SSD

Windows 7 Home

Corsair H80i

 

I was just trying a multiplier of 41 with a vcore of about 1.2 to start, with plans of bumping it down substantially.  But these temps are astronomically high for those settings (from what I gather from the overclocking database).  

[ForsakenLive]

Don't use Aida64, as many times it's found that it increases voltage on Haswell CPUs, use the Intel CPU burn test instead.

[Queek]

Ok I'll try that instead.  Thanks for the tip.  

[Queek]

Intel burn test resulted in the same temperatures as AIDA64 (in fact they were reached much faster).  I suppose I'll check the mounting on the block as there are no other suggestions. 

[cooperred]

Is your pump working? Check the block and remount it maybe

[Queek]

I checked the mount and it had very poor contact.  It turns out that the sides of the pump contact the vram if it's oriented 90 degress off normal for this board, so the water block wasn't making contact with the CPU heat spreader.  

I reoriented and remounted it and the super high temps are gone.  

 

I'm running AIDA64 right now and the cores are averaging mid 60's and the cpu is sitting at 44.  This is more what I'm used to for the difference between those two readings.  

 

Thanks for the help troubleshooting... it turned out to be my own incompetence.  

 

For those who follow in my footsteps: 

If you have wildly different core and CPU temps (yes they are different numbers), check the mounting on your heatsink/water block.