2 random BSODs in Custom Build PC, latest BCCode 24

I recently built this PC. But have already suffered two BSODs.
The latest BCCode is 24.

I've attached both minidump files and the PC build spec.

hi,
Having submitted 2 system dump files to start my thread, I tried to add the MEMORY.DMP file but to no avail.

I have the dump file MEMORY.DMP from when the BSOD BCCode 24 happened, but I note I cannot upload
it to this forum as it is 760MB big! Is there a way to get this file analysed as it obviously has a lot of critical data
in it?

I am new to this forum by the way. So any other help I can offer please let me know?

Some background to this. I am a fairly competent system builder, and am aware of constraints so I build reasonably within the limits. I do not overclock or modify BIOS parameters either. This is a very standard build in my opinion. The more reason this one has got me stumped?

Two areas in this system build where I have differed from other builds include; the size of RAM used and a new HDD model.
That is the use of 8GB (2x4GB) of DDR3 1600mhz modules, and the use of a high performance 500GB WD Black series HDD (SATA 6GB/S).

I also had a rather unusual fault with the adding of a card reader to this build. It failed to install the standard windows 7 drivers? I tested the card reader in another PC and it installed and worked flawlessly.

A more recent problem was the failure to install a group of windows 7 updates? This batch of 20 was installed on another Windows 7 PC without issue.

If any of the above two pieces of hardware are known culprits of random and varying BSOD's I'd be grateful to know.
Thanks.