Hi CraigS,
Welcome to the 10blog
Please update the BIOS to version A11
Product Support | Dell US
Please remove either of the memory sticks, running mixed memory can cause various of problems that can be difficult to diagnose properly. Please know that it does not matter if this setup is used for a long period.
Code:
[Memory Device (Type 17) - Length 34 - Handle 002ch] Physical Memory Array Handle 002bh Memory Error Info Handle [Not Provided] Total Width 64 bits Data Width 64 bits Size 4096MB Form Factor 09h - DIMM Device Set [None] Device Locator DIMM3 Bank Locator [String Not Specified] Memory Type 18h - Specification Reserved Type Detail 0080h - Synchronous Speed 1600MHz Manufacturer Hynix/Hyundai Serial Number Asset Tag Number Part Number HMT451U6AFR8C-PB [Memory Device (Type 17) - Length 34 - Handle 002fh] Physical Memory Array Handle 002bh Memory Error Info Handle [Not Provided] Total Width 64 bits Data Width 64 bits Size 4096MB Form Factor 09h - DIMM Device Set [None] Device Locator DIMM1 Bank Locator [String Not Specified] Memory Type 18h - Specification Reserved Type Detail 0080h - Synchronous Speed 1600MHz Manufacturer Kingston Serial Number Asset Tag Number Part Number K531R8-ETB [Memory Device (Type 17) - Length 34 - Handle 0031h] Physical Memory Array Handle 002bh Memory Error Info Handle [Not Provided] Total Width 64 bits Data Width 64 bits Size 4096MB Form Factor 09h - DIMM Device Set [None] Device Locator DIMM4 Bank Locator [String Not Specified] Memory Type 18h - Specification Reserved Type Detail 0080h - Synchronous Speed 1600MHz Manufacturer Hynix/Hyundai Serial Number Asset Tag Number Part Number HMT451U6AFR8C-PB [Memory Device (Type 17) - Length 34 - Handle 0033h] Physical Memory Array Handle 002bh Memory Error Info Handle [Not Provided] Total Width 64 bits Data Width 64 bits Size 4096MB Form Factor 09h - DIMM Device Set [None] Device Locator DIMM2 Bank Locator [String Not Specified] Memory Type 18h - Specification Reserved Type Detail 0080h - Synchronous Speed 1600MHz Manufacturer Kingston Serial Number Asset Tag Number Part Number K531R8-ETB