Ram Latency CAS
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Shneiky
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- Aug 21, 2011
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No. RAM has to have the same latency, MHz and Voltage. It is recommended to use kits from the same manufacturer and of the same model. RAM is a weird thing. It sometimes just refuses to work, even without any apparent reason. It is a bit frustrating and time consuming to deal with RAM problems. But if you get 2 kits from the same model and manufacturer - they will most certainly play along nicely.
- May 18, 2007
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It is possible to mix DIMMs with different ratings. But because the memory controller does not support mixed timings, you have to use the slowest timings of any installed RAM for that sort of setup to have a reasonable chance of working... one of those "weakest link" sort of things: you cannot run any DIMM any faster than your slowest DIMM.
If your slowest DIMM can only do 1600-11-11-11, all your other DIMMs will have to run at 1600-11-11-11 even if they are rated 1833-9-9-9
If your slowest DIMM can only do 1600-11-11-11, all your other DIMMs will have to run at 1600-11-11-11 even if they are rated 1833-9-9-9
- May 18, 2007
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There is a 95+% probability that it will. Not all motherboard, DIMM and CPU mixes behave exactly the same.
Even configurations with all-identical DIMMs which many people here consider ideal still fail on some CPU/MoBo combinations.
- Jun 10, 2014
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So I will try to put it with my other DIMMs, if it fails it will not broke something on my components correct?
Btw, I have 1 4GB with CAS: 10-10-10 and another one with 2GB and the same CAS, Im going to try like this:
- Put the RAM which have the CAS: 10-10-10 with the 2 RAMS which have CAS: 11-11-11
- If it doesn't work, do you think the 4 GB DIMM's is faster than the 6 GB DIMM's which have the CAS: 11-11-11?
Btw, I have 1 4GB with CAS: 10-10-10 and another one with 2GB and the same CAS, Im going to try like this:
- Put the RAM which have the CAS: 10-10-10 with the 2 RAMS which have CAS: 11-11-11
- If it doesn't work, do you think the 4 GB DIMM's is faster than the 6 GB DIMM's which have the CAS: 11-11-11?
Unolocogringo
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- Dec 31, 2007
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Maybe.
Different memory modules have more timing values than the standard stated 10/10/10/ values.
There are secondary timings that are not stated on the packages.
The motherboard will read all of these timings and try to set timings that will work with all modules.
Sometimes it works, sometimes it doesn't.
Sometimes it works, but you are stuck with severely down clocked memory with terrible timings.
So we have no way of knowing how your motherboard/cpu combo will react when mixing different memory modules.
It should not damage anything unless the voltages are way different. Such as mixing 1.65 volt with 1.35 volt memory.
Different memory modules have more timing values than the standard stated 10/10/10/ values.
There are secondary timings that are not stated on the packages.
The motherboard will read all of these timings and try to set timings that will work with all modules.
Sometimes it works, sometimes it doesn't.
Sometimes it works, but you are stuck with severely down clocked memory with terrible timings.
So we have no way of knowing how your motherboard/cpu combo will react when mixing different memory modules.
It should not damage anything unless the voltages are way different. Such as mixing 1.65 volt with 1.35 volt memory.
- May 18, 2007
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If you have asymmetric memory channels, you do not get full dual-channel bandwidth and that will usually hurt performance a lot worse than an extra RAS/CAS latency cycle.
Since what you said appears to imply you have a 4GB 11-11-11 DIMM, you might be able to pair that with your other 4GB DIMM if it has the same chip configuration to get dual-channel working.
Ideally, you should at least buy DIMMs in paired kits to avoid having to worry about matching the exact chip configuration (same number of chips, same number of loaded sides/ranks) on each DIMM yourself.
Since what you said appears to imply you have a 4GB 11-11-11 DIMM, you might be able to pair that with your other 4GB DIMM if it has the same chip configuration to get dual-channel working.
Ideally, you should at least buy DIMMs in paired kits to avoid having to worry about matching the exact chip configuration (same number of chips, same number of loaded sides/ranks) on each DIMM yourself.
- May 18, 2007
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We have no way to know for sure how motherboards and CPUs will react even to identical modules. The only thing we do know is that it is usually less likely to have issues. Every now and then, there are cases where a single pair of DIMM simply does not work in a given system even though it tests perfectly fine in others.
Nothing is certain even under ideal conditions.
- May 18, 2007
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What is the actual DIMM configuration? For 6GB with full dual-channel benefits, it would need to be 2x2GB + 2x1GB but you said you only had two DIMMs, which implies you have 1x4GB + 1x2GB.
Tradesman1
Legenda in Aeternum
- Jun 5, 2013
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PSu isn't going to matter, if it's a 4 slot mobo try the 4GB in slot 1 closest to the CPU and the 2GB in slot 3 (from CPU, if they don't play, give me a shout and we might be able to adjust the timings and voltage to get them to play - will need the mobo, CPU and DRAM model #s
Tradesman1
Legenda in Aeternum
- Jun 5, 2013
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Give them a shot, would try 1-3 if no joy, reverse them in the same slots, if still no joy do same in 2-4...if still no joy, let me know the actual model numbers and we'll try a couple of adjustments (voltage and/or timing)
Tradesman1
Legenda in Aeternum
- Jun 5, 2013
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Tradesman1
Legenda in Aeternum
- Jun 5, 2013
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There are a few of those, the actual model NUMBER as well as the number of the other stick is needed to help figure out the best combination of timings and voltages - also the CPU and mobo model #s
Tradesman1
Legenda in Aeternum
- Jun 5, 2013
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Tradesman1
Legenda in Aeternum
- Jun 5, 2013
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Yes, you go into the BIOS and make the changes, if unsure might see if a tech savvy friend can lend a hand
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