RAM Latency Compatibility

[greddy1287]

Hi everyone.

 

Desperately looking for help here. I built my PC back in Jan/Feb and purchased 16 GB (2 x 8GB) of G.Skill Ripjaws V DDR4 RAM (F4-3600C16D-16GVKC) with latency at CL16-19-19-39 1.35v. PC runs great. Super happy with the performance. No issues encountered.

I got an ebay Gift card recently and decided to purchase, what I thought, was the same 16GB of RAM as a rather cheap upgrade to 32GB of RAM. When I received the RAM, I realized the latency numbers were different. The new sticks are G.Skill Ripjaws V DDR4 RAM (F4-3600C18D-16GVKC) with latency at CL18-22-22-42 1.35v.

 

Will this cause PC issues if I install all 4 sticks into the PC? Or will it run at the slightly slower latency speeds? I am trying to decide if it is worth returning the product.

 

Specs for reference:

 

AMD Ryzen 5 3600 3.6 GHz 6-Core Processor

Asus ROG Crosshair VIII Hero (WI-FI) ATX AM4 Motherboard

 

Gigabyte Radeon Rx 5700 Gaming OC 8G Graphics Card, PCIe 4.0, 8GB 256-Bit GDDR6, Gv-R57GAMING OC-8GD Video Card

Sabrent Rocket Q 1TB NVMe PCIe M.2 2280 Internal SSD High Performance Solid State Drive (SB-RKTQ-1TB)

CORSAIR RMX Series, RM850x, 850 Watt, 80+ Gold Certified, Fully Modular Power Supply

Edited May 29, 2020 by Glenwing
Formatting removed

[Guest]

50/50 chance. We'll know once you've tried it.

For you I hope so.

Probably for XMP, use the looser timing set of the new memory and use additional voltage over recommended xmp setting.

[pstarlord]

IMO, there are very few situations where you will ever NEED 32 Gigs of RAM, so I'd just return it.  Unless you do a lot of content creation, or streaming, or just want to open 1000 chrome windows. 

 

Also, given that you're using a Ryzen CPU, the tighter timings of your 16Gig set will probably yield you better performance overall.

[ZephCloud]

Even if it's the same set of ram it'll probably run slower...since they're not tested as a 4 stick kit..only tested in the 2 stick configuration..there's another video by msi overclocker/tester toppc lin where he talks about ram speed and motherboard layout etc....But it's in mandarin...

 

 

 

[Nena Trinity]

Enable XMP and see if it fail with memtest86, if no fail just keep it as it is. If a failure is found you need to set MHz and timings manually to the slowest sticks specs for each timing. 

[Nena Trinity]

3600MHz / CL18-22-22-42 (beware its probably a 5th timing tough I am not sure if that is also for DDR4 or just DDR3...

[greddy1287]

Thanks everyone. Quick update, I actually was able to boot and the system recognized the 32 GB of RAM. Upon reviewing the BIOS settings, I fine tuned and overclocked the memory by 3% and the system failed and would not boot. I reviewed the MOBO manual and it indicates not to mix memory with different latency. I had to reset the CMOS in order to get a successful boot. Learned the hard way but I am just going to return the slower latency RAM sticks. I am going to decide if I need 32GB of RAM or if I can put that towards another upgrade later. Thanks again for the help everyone.