The 4710HQ can take 32GB of RAM per Intel, but it doesn’t mean it will work. The CPU and PCH are designed to support 32GB, but you need to make sure the hardware and firmware can handle it, especially the BIOS. Even if everything lines up firmware and CPU wise, the upgrade may not work due to design compromises or defects in certain board revisions where it was cheaper to cut back the RAM a bit, and the machine will either work or will not based on the board rev, or none will if the design flaw is never fixed. In those instances, it’s safer for the OEM to rate the system at 16GB *officially* and you end up with some machines that don’t take it, while others are capable of handling it with full stability. Be prepared to take it out and go to the HP validated maximum just in case. The issue isn't EXCEEDING the official max, it's the RISK of why it was rated at 16GB. DO NOT rely on it until you can load it up to use all 32GB for hours on end for 1-2 weeks, at least.
What I usually do when I want to max it out beyond the validated limit with the best chances are to update the BIOS to rule out firmware failures upfront, and then do it while testing the machine day to day, not in production. Even then due to the risk of failure, I won’t do it professionally to avoid the risk of having to undo the work and max it out to the OEM validation, but I’ll advise the owner to update the BIOS and see if it works out for them - it could work but it may also crash and burn. The issue is installing it puts me at risk, and I may need to front the cost of maxing it officially due to the liability I took on. If I just tell them it's a gamble and to max the BIOS out at the time then run it, then it was on them.
Don’t mix and match modules in an HP - get a matched module kit. HP machines are absolute snowflakes about mixed module installs where finding a pair that works is hard (especially SureStart notebooks, they are anal about RAM timing!). Get it wrong, and you end up going in with a matched set anyway; just match it from the beginning. The issue with mixing RAM is OEM memory is often lower grade than retail modules, so they tend to be a poor fit for it.
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