[SOLVED] I am considering mixing memory all from Corsair.

The model numbers:

CMK8GX4M2B3000C16 vs. CMK8GX4M2C3000C16 - I wonder if I mixed them if I'd have compatibility issues.

I currently have a 2x4GB Kit of the older model Corsair RAM. The newer model is a revision different.

I doubt I would get DDR4-3000 with 4 slots occupied, but I was curious if you all thought it would work at all...

PCPartPicker Part List

CPU: AMD - Ryzen 5 1600 3.2 GHz 6-Core Processor (Purchased For $169.99)
Motherboard: ASRock - AB350 Pro4 ATX AM4 Motherboard (Purchased For $120.00)
Memory: Corsair - Vengeance LPX 8 GB (2 x 4 GB) DDR4-3000 Memory (Purchased For $120.00)
Storage: Western Digital - Caviar Blue 1 TB 3.5" 7200RPM Internal Hard Drive (Purchased For $39.99)
Video Card: EVGA - GeForce GTX 950 2 GB FTW ACX 2.0 Video Card (Purchased For $179.99)
Case: Corsair - 100R ATX Mid Tower Case (Purchased For $59.99)
Power Supply: SeaSonic - S12II 520 W 80+ Bronze Certified ATX Power Supply (Purchased For $46.71)
Optical Drive: Asus - DRW-24B1ST/BLK/B/AS DVD/CD Writer (Purchased For $18.89)
Operating System: Microsoft - Windows 10 Home OEM 64-bit (Purchased For $109.99)
Wireless Network Adapter: Asus - PCE-AC55BT PCIe x1 802.11a/b/g/n/ac Wi-Fi Adapter (Purchased For $54.99)
Case Fan: Noctua - NF-S12B redux-1200 PWM 59.1 CFM 120 mm Fan (Purchased For $14.99)
Monitor: AOC - e2752Vh 27.0" 1920x1080 60 Hz Monitor (Purchased For $243.79)
Mouse: Logitech - MX Anywhere 2 Wireless Laser Mouse (Purchased For $53.38)
Headphones: SteelSeries - Siberia V2 Headset (Purchased For $60.85)
Speakers: Logitech - Z623 200 W 2.1 Channel Speakers (Purchased For $129.99)
Custom: Chicony KB-5911 rebranded as Micro Inovations - Model # KB-5911 (Black) (Purchased For $4.24)
Total: $1427.78
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2019-05-21 18:13 EDT-0400
I've done it in the past but Ryzen at least initially was very sensitive to RAM in general. I do have the newest BIOS running currently and that resolved the memory issues I was having.
Its tempting since its only a $50 dollar gamble.
I did it on an i5-2500k and ASRock Z75 PRO3 where I had a Kingston DDR3-1333 set of 2x2GB and I installed a DDR3-1600 set of 2x4GB for a total of 12GB of course it ran at 1333 but it worked fine - plug and play...

Kingston KHX1333C9D3B1K2/4G - DDR3 1333 CAS 9 (original set)
Crucial BLT2KIT4G3D1608DT1TX0 - DDR3 1600 CAS 8 (new set)

Memory: Kingston - Blu 4 GB (2 x 2 GB) DDR3-1333 Memory (Purchased For $52.99)
Memory: Crucial - 8 GB (2 x 4 GB) DDR3-1600 Memory (Purchased For $44.99)

I ended up mixing Corsair Vengeance LPX DDR4-3000 CAS 15-17-17-35 2x4GB with a Corsair Vengeance LPX DDR4-3000 CAS 16-20-20-38 2x8GB set for a total of 24GB, and without any tweaking needed to boot.
It is only running at DDR4-2133 15-15-15-36-51-2T for now however. I will do some BIOS tweaking and try to get it happy at DDR4-2666. If I can not get it to at least DDR4-2666 I'll remove the old 2x4GB set and sell it and run the 16GB kit at its rated speed.


I ended up getting the DDR4 kits running together at DDR4-3000 with the slower CAS 16-20-20-20-38-70-1T @ 1.350v timing but I felt that overall the system was unstable, displaying odd system issues and chose to back off for now to DDR4-2666 16-18-18-18-38-58-1T @ 1.210v, I am having no system stability issues at this time with these settings.

Overclocking the CPU to my previous overclock settings of 3.867GHz @ 1.3675v was attempted at DDR4-3000 and the system was so unstable that I had to clear the CMOS with the motherboard's onboard jumper. I'll attempt a smaller overclock now that everything appears stable at DDR4-2666 but I'm all out of will power to try that today, perhaps in a few days once stability seems good at my current DDR4-2666 I'll try it.


I am now running at DDR4-2800

Current Timings




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