RAM questions

The timing is different, so it's going to be hit and miss if the added 8 gb RAM modules will work or not.
They should work, however they will run at the slower speed.
I installed 2x8 DDR4 Corsair Vengeance, along with 2x4 DDR4 HyperX Fury.
Both have different timings and the Corsair modules were at 3000 MHz.
I installed the 2x4 HyperX Fury and now the all the RAM runs at 2133 MHz, and with different timings.
I haven't noticed any measurable difference in my systems speed/performance.

Access Denied said:

That is what I kind of figured. The main bottleneck is the hard drive and I have an SSD. I just wondered if things like loading into games, opening larger programs etc, I would notice a hit. I guess I could just stick it in so to say and see how it goes. I just hate going inside a case when nothing is wrong lol.

All the RAM will run at the slowest, which is whatever RAM is slower.
Also, it depends on the motherboard. Some motherboards don't play nice with mixed matched RAM modules.
Stick it in, if it works... you really won't notice any difference. Unless your doing bench-marking.

Access Denied said:

They are so old I have no idea the speeds of them. I do know the 8GB is much "cheaper" than the 16GB. I could have bought like 32GB or more of the 8GB at the time for what I paid for the 16GB. I got the latency from CPU-Z.

Install the modules and than run CrystalDiskInfo.
I meant to say run CPU-Z, not CrystalDiskInfo.

You can type: wmic memorychip get speed

Into command prompt as admin to get the memory speed.

Access Denied said:

Seemed to take a little longer once I logged in to get to my desktop than before. It wasn't bad and could have been the CU from earlier today. I have not rebooted since. I have CPU-Z open.

Do you still have Dual Channel?