2x4gb DIMMs - Only 2x2gb Detected

damianlhayes · Aug 23, 2014

I used to have 8GB RAM working fine. I just noticed that only 4GB of that is now detected. After flashing my bios and multiple re-seating of the DIMMs and running memory tests, it's still not working.

One thing i have eliminated though, both DIMMs are working the same. If I remove one of them and boot up i get just 2GB RAM. I have tested this on both DIMMs.

Does any know why the RAM on each DIMM would be halved?

- ASUS P8P67 EVO
- Intel CORE i5 3.3ghz
- AMD Radeon 6800
- HyperX Blu Series 1600 MHz DDR3 CL9 DIMM Gaming Memory Kit (2 x 4 GB)
- Win7 (64bit)

Thanks

scout_03 · Aug 23, 2014

memtest each of them one at the time .

Tradesman1 · Aug 23, 2014

What's model # or #s of the sticks

damianlhayes · Aug 23, 2014

Tradesman1 :

Part Number: 9905403-174.A00LF (not sure if this is relevant- but same for both)
Serial Numbers are
1st: 3C25446E
2nd: 3B25276E

damianlhayes · Aug 23, 2014

scout_03 :

Tested one on its own, gave it an hour's test. Nothing showing, still only half the RAM it should have available.

Tradesman1 · Aug 23, 2014

That's the model number for a 2GB stick, 1333, 1.5

damianlhayes · Aug 23, 2014

Tradesman1 :

I think the model number is the same for the 2,4 and 8 GB dimms.

http://www.amazon.co.uk/exec/obidos/ASIN/B0057Q4ADU/ref=ox_ya_os_product_refresh_T1

This is the item in my order history. It has ###/4gb on the chips. It would have been the first thing I would have verified when installing. I am still certain i have got a faulty something.

scout_03 · Aug 24, 2014

you could use cpu-z on the spd page or hwinfo on the memory one hey will give you the exact value of you ram stick .

damianlhayes · Aug 31, 2014

scout_03 :

CPUz shows 2gb for each channel.

One thing that did show up of potential interest. The RAM frequency is only 686 mhz. Should be 1600Mhz. I have manually configured the bios setting to clock the RAM at 1600 anyway just to see if that was the problem.

scout_03 · Sep 1, 2014

686 x 2 = 1372 that is the frequency memory run to , then this look like you have 2 gig ram module and the the one you bought .

damianlhayes · Sep 12, 2014

scout_03 :

This is from the email in my inbox with the confirmation
Delivery estimate: 26 July 2013 - 30 July 2013
2 "Kingston 1600MHz DDR3 Non ECC CL9 8GB Kit (2x 4GB) HyperX BLU XMP DIMM Memory Module"
Personal Computers; £53.00

I know the DIMMs are 4GB each, it used to work fine with 8GB in full use. My rig is now bricking itself on games it used to run without issue.

scout_03 · Sep 12, 2014

then check those in another system and if they are read 4 gig each i would give a look at the motherboard .

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