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Windows 7: Memory Compatibility

05 Jan 2015   #1
krustykobb

Windows 7 Ultimate x64
 
 
Memory Compatibility

I have two DIMMS of Corsair Vengeance 4GB RAM (2 x 2GB) at 1600MHz, although whenever I try to turn it up to this speed Windows BSODs during boot so I left it at 1333MHz, however I would like to add a DIMM of KomputerBay 8GB 1600MHz to my system but I'm sure the timings are different; the Corsair has timings of 9-9-9-24, and the KomputerBay RAM has timings of 10-10-10-27. Will these run together in the same system? I have an Asus Z97 Pro Motherboard. Thanks in advance


My System SpecsSystem Spec
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05 Jan 2015   #2
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

I highly recommend NOT running unmatched ram.

Your system should be able to run this at the 1600 speed.

Quote:
orsair Vengeance 4GB RAM (2 x 2GB) at 1600MHz
What are you looking at that makes you think it isn't running at that speed?

You can use this program to monitor your ram.

CPU-Z CPUID - System & hardware benchmark, monitoring, reporting

I have 2400 ram running at 2332. 1166 X 2


Memory Compatibility-cpu-ram-speed.png


My System SpecsSystem Spec
05 Jan 2015   #3
krustykobb

Windows 7 Ultimate x64
 
 

The system says that the target DRAM frequency is 1333MHz, and I know the RAM is capable of running at 1600MHz as it has an XMP profile that enables this, however when I click this when Windows is loading I get a very quick BSOD and the system then restarts, repeating this process. Why would you suggest I don't run the unmatched RAM? I ran the same configuration in my old system and now in my new one the board refuses to POST
My System SpecsSystem Spec
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05 Jan 2015   #4
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

I recommend not running mismatch ram so you don't get the problem you are having now.

What run in your old system does not qualify it to run in this new system.

When you use mismatched ram the system will only run at the speed and settings of the lowest ram installed.

I personally set my ram speed and voltages in the bios. But I can't set it to something the system doesn't like or it will BSOD.

XMP will sometimes set the voltages to high.
There is a system to what you can and can not do. First you must have the proper hardware.

If you use the program I posted and then post a picture it would help us understand what you got.

How to post a picture using a tutorial by Brink.

Screenshots and Files - Upload and Post in Seven Forums

I will ask this question one more time. In order for members to help you we need information from you.

What are you looking at that makes you think it isn't running at that speed?
My System SpecsSystem Spec
05 Jan 2015   #5
krustykobb

Windows 7 Ultimate x64
 
 

What is making me think that it is not running at that speed is the fact that in the BIOS it says the DRAM frequency is 1333MHz whereas the RAM is capable of running at 1600MHz, but whenever I try to enable the XMP profile or manually turn up the DRAM frequency to achieve this it BSODs

A screenshot can be found below:

Memory Compatibility-capture.png


My System SpecsSystem Spec
05 Jan 2015   #6
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

Exactly what ram do you have installed and in what slots of the motherboard?

You could also go into bios and set to default (not XMP) and see if the system will read 1600.
My System SpecsSystem Spec
05 Jan 2015   #7
krustykobb

Windows 7 Ultimate x64
 
 

Current RAM installed is Corsair Vengeance 4gb (2 x 2GB) 1600Mhz Dual Channel kit, installed in slots 2 and 4 which is optimal according to the motherboard manual. I've tried restoring optimal defaults in BIOS and no change
My System SpecsSystem Spec
05 Jan 2015   #8
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

Very strange.
I will get another set of eyes on your problem and see what we can come up with.

Do I understand you correctly?

If you set the ram to 1600 and the proper ram voltage and and everything else to default you get a BSOD.
My System SpecsSystem Spec
05 Jan 2015   #9
krustykobb

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by Layback Bear View Post
Very strange.
I will get another set of eyes on your problem and see what we can come up with.

Do I understand you correctly?

If you set the ram to 1600 and the proper ram voltage and and everything else to default you get a BSOD.
Yes this is correct, I get a BSOD as Windows is starting
My System SpecsSystem Spec
05 Jan 2015   #10
essenbe

Windows 7 Enterprise X64/Windows 10 Enterprise X64/Windows 10 Pro X64/Linux Mint
 
 

Please post a screenshot of CPUz , the CPU, Mainboard, Memory and the SPD tabs. On the SPD tabs, each Dimm Slot can be selected from a dropdown list in the upper left. We only need the ones populated with ram.

I would also suggest you listen to Layback Bear's recommendations. It is never a good idea to run mismatched ram on any system and especially so on a system that already has ram problems. Plus, I have never heard of KomputerBay ram. It is not a top notch company and not one I could recommend. Ram sold in kits are tested by top notch companies to run well together. Individual sticks are not. Ram should always be bought in kits.
My System SpecsSystem Spec
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