I'm looking to upgrade my system by adding a new 2x8GB DDR4 RAM kit to the 2x8GB I already have, bringing my total to 32GB. Upon checking the new kit, I noticed that it has the same CAS latency, voltage, brand, and frequency as my current RAM, but the part numbers are slightly different. Here are the specs:
New RAM Kit:
CL: 16
Voltage: 1.35V
Frequency: 3200MHz
Brand: PNY XLR8
Part #: 8GBF1X08QFHH38-136-1A
Current RAM Sticks:
CL: 16
Voltage: 1.35V
Frequency: 3200MHz
Brand: PNY XLR8
Part #: 8GBF1X08QFHH38-135-K
For additional context, here are my PC specs:
- Processor: AMD Ryzen 5 5600
- Motherboard: Asus TUF B450 Plus Gaming
- GPU: Galax GeForce RTX 3070
- SSD: Inte 512GB M.2 NVMe SSD
- PSU: Deepcool PK650D 650W 80+ Bronze
- CPU Cooler: ID Cooling FROZN A410
- Case: WJCoolman Hexa ATX
- Case Fans: 4x Keytech Tornado 120mm fans
I'm curious if these two kits are likely to work together or if anyone has had a similar experience. Any insights or advice would be greatly appreciated!
3 Answers
There's a decent chance they'll work together, especially since they share the same CL, voltage, and frequency. If they’re on the Qualified Vendor List (QVL) for your motherboard, that could enhance compatibility, but even off-list RAM can function together. Just keep in mind the worst-case scenario could involve limited support for XMP profiles. Double-check PNY’s specs on their site too, just to be safe!
Exactly! Just be cautious with changes, and you should be fine.
I wouldn’t recommend mixing RAM kits at all. It can lead to issues like boot failures. Even if they seem compatible, there's always a risk involved. Stick with a single kit for best results!
Honestly, this comes up all the time! It’s tricky to predict how different RAM will behave. Even if they’re the same specs, they can still cause stability problems. You might want to stick to one set.

So, it should work, but I may need to tweak timings or voltage in BIOS to get them to play nice? That sounds manageable!