Cores running hot at ~100C, but overall CPU is low?

faulty cooler or lack of or too much thermal paste?

Heyo Farid.
Based on the fact your CPU core temps are going so high my first thought is lack of thermal paste or dead/dust clogged CPU fan. If you can confirm neither of these are the case, you could be overvolting your CPU, especially if you had OC'd. I would recommend checking your thermal paste. You have an older CPU so it's very likely the thermal paste has dried up and is doing a poor job at this point. I'm going to include the steps for GPU thermal paste/pad changes as well.
Things you will need to change thermal paste/pads for CPU and GPU: isopropyl alcohol (70%+), lint free cotton swab (coffee filter, paper towel, etc.), thermal paste (non-conductive preferably) (You will have to buy some if you're using the stock cooler. Aftermarket coolers tend to come packaged with a tube of paste.), thermal pads (GPU ONLY), screw driver and sorting tray (GPU ONLY).

CPU: Remove your cooler and clean up the cooler and CPU with your alcohol and paper towel (or equivalent). With all of the thermal paste removed, give it another once over with alcohol and be sure not to leave any residue (finger oils) or dust on either surface. Throw a dab of thermal paste on the middle of the CPU (Enough that it will spread across the CPU; not too little!). The heat sink should spread the paste and remove any air bubbles. At this point, make sure no paste is dripping over the CPU and onto your motherboard. Clean up any that is and honestly I would recommend you redo the entire process to make sure it's cleaned properly with the heat sink removed. This is should be all you need.

GPU: Keeping track of their assigned locations, remove all visible screws. Carefully pull the cooler off. If there is resistance, you can try to wiggle it slightly. As with any form of suction, they will often slide around much easier than pulling apart and sometimes you can break the air seal by doing this. Again, slightly. Don't force the cooler around as you risk damaging components with the heat sinks. Once it starts to come loose, make sure you disconnect the fan from the PCB (GPU board; equivalent to motherboard) so as to not tear the solder points from the PCB or damage the connectors in any other way. At this point (depending on your GPU's age), visually inspect the thermal pads you should find scattered around the card. Leave the pads where they are or set them aside (Keep in mind exactly where they go. Some have different thickness!) if necessary. If any of these pads tear while removing the cooler I would recommend you buy new pads before reinstalling (SOMETHING TO DO BEFORE HAND). Just like with a CPU, at this point you can clean the GPU socket and heat sink. Once again, apply NON-CONDUCTIVE thermal paste (be generous). Reapply the thermal pads (old and new), reconnect the fan, and reseat the cooler shroud onto the card. Screw everything back together.

This should give you an idea of what you're doing. It's always a good idea to use non-conductive thermal paste so you have a safety net if any paste gets where it shouldn't be.

As I completely forgot to elaborate on overvolting, this can happen when you push an overclock too far. As you probably know, the higher voltage you put into the CPU, the higher the temps will be. If you are unsure about any adjustments you made, you should enter your BIOS and reset to default settings. This is a simple change you can make without having to remove any heatsinks and change any thermal paste.

That's one groovy looking cooler!

Were you running into any stability issues? Crashes? I'm curious if the temperatures are being read incorrectly. Can you check using CPU-Z or another program? It does seem odd that the temperatures are doubled on the cores. Again, check with a second program to confirm. Has this been a persistent issue? An unknown issue until now? An undiagnosed, but known, issue for some time? Could you give me an idea of how much thermal paste you used? You seem like you know what you're doing but I just want to be sure too little wasn't used. It's much easier to use too little than too much.

I agree with breek, though i hate it for he already gave all possible resolution to solve your problem. LOL
* Just so in case that you've checked everything breek mentioned, we can conclude that there is a possible fault on your motherboard. Faulty capacitors that may be overvolting the processor (even if it's not needed) thus causing the brain to generate more heat. I assemble desktops as a living and encountered this one time. Though not reaching 90-100c, it was 80-92c. Replaced motherboard and processor started running on idle temp

100626976,

The screenshot shows Vcore is only at 1.216, while Core temperatures are pegged at 100C Throttle temperature. Maximum recommended Vcore for 45 nanometer processors is 1.400, so he's well under that voltage.

Also shown is the processor frequency at 2.93GHz, which is slightly above it's default frequency of 2.8GHz. The i7 930's were often overclocked to 4.4GHz using a 200MHz FSB and a maximum 22x multiplier: http://ark.intel.com/products/41447/Intel-Core-i7-930-Processor-8M-Cache-2_80-GHz-4_80-GTs-Intel-QPI

Since faridfxx pointed out in his second post that Core temperatures changed after remounting the cooler, the problem appears to point toward the cooler remount, which was the last action performed.

CT