Mixing RAM with different CAS latency

PAULfromDB

Reputable
May 27, 2015
2
0
4,510
Hi guys, just wondering, I know that mixing memory size and speed is a no-no.. but what if everything is the same except for the CAS Latency? My rig already has 8gb (2X4gb) Corsair Vengeance 2133mhz 11-11-11-27 timing and I bought a Mushkin Radioactive 4gb, same speed as the Corsair but has 10-12-12-28.. will it be a problem? confusing the BIOS?

Thank you very much and hope you all have a great day!
 
Solution
The main thing to remember is that while it might not play nicely at 'auto' settings, you might be able to get them to work together as long as you -manually- set the timings and speed to whatever the -slowest- chips are rated for. Remember that the chips are rated usually by the fastest sustainable error-free speeds, they can always be downclocked to run -slower-.

So - set the speed and timings to a nice safe setting -first- (ie: NOT the 2133 speed, more like the 1600mhz speed) and see if they play nice. Then gradually bump it up until it doesn't.

I'd be willing to guess that (since they are both quality modules) you could hit 2133 mhz, but you might have to manually set the timings to 11-12-12-28

Tradesman1

Legenda in Aeternum
Never know unless you try them, you could get two identical model sets and they might not play at all, might also get two vastly different sets and they might play - always best to get a single package of the full amount you want which is guaranteed to play nice
 

Rookie_MIB

Distinguished
The main thing to remember is that while it might not play nicely at 'auto' settings, you might be able to get them to work together as long as you -manually- set the timings and speed to whatever the -slowest- chips are rated for. Remember that the chips are rated usually by the fastest sustainable error-free speeds, they can always be downclocked to run -slower-.

So - set the speed and timings to a nice safe setting -first- (ie: NOT the 2133 speed, more like the 1600mhz speed) and see if they play nice. Then gradually bump it up until it doesn't.

I'd be willing to guess that (since they are both quality modules) you could hit 2133 mhz, but you might have to manually set the timings to 11-12-12-28
 
Solution