Windows 7 64bit 4gb of Ram but only 2 can be recognized

[M. András]

pull out 1 of the moduls and look for a sticker which states atleast the timings or etc. or look up the memory chips
edit: after checking again that validation data you give us, i would say motherboard problem, i dont recall if the memory controller of that cpu+motherboard are in the northbridge or in the cpu but that could be a fault too

[ChrisGreece52]

By timming you mean the sticks frequency??? (btw its 1333 mhz)

[IanB]

If you are going to put two memory cards in paired sockets (white-white) or (blue-blue), then both memory cards should be as identical as possible. Same manufacturer, same type, same specifications, same manufacturing date. That's why memory kits are often sold in matched pairs. If you put different cards in paired slots they may not work properly.

Are your two memory cards a matched set?

[IanB]

If they are not matched, I think you would need to put one in the first white slot, and the other in the first blue slot.

[grumpydoc]

i got the cards installed in the two slots closest to the cpu (blue and white ones) and bios say that i got FOUR GB OF RAM!!! finally 

Well, won't be dual channel but at least it works.

Are your two memory cards a matched set?

He originally posted a data sheet for 2x2GB DIMMS so they probably are.

[nctnico]

I installed today windos 7 64 bit (i had windows 7 32bit) because i wanted to take advantage of all my ram!!!
But when i went at system properties it said Ram : 2GB
My Pc Specs :
Windows 7 64bit
2 X 2 GB ram (KVR1333D3N9K2/4G)

Check the motherboard's manual to see if this memory is compatible (probably not).

[M. András]

nah the geil rams i have not listed on this board neither the previous one and it worked just fine, that qvl list of the board manufacturers are mostly shit, cos they wont even test multiple rams just a few

[madires]

Maybe a problem with the ranks, like quad-ranked DIMMs.

[Psi]

I would try tweaking the bios ram settings.
-Disable dual/triple channel memory mode
-Increase the CAS
-maybe lower the mem clockrate if you can.
-Try reset the ram settings page to defaults.

[ChrisGreece52]

If you are going to put two memory cards in paired sockets (white-white) or (blue-blue), then both memory cards should be as identical as possible. Same manufacturer, same type, same specifications, same manufacturing date. That's why memory kits are often sold in matched pairs. If you put different cards in paired slots they may not work properly.

Are your two memory cards a matched set?

Yeah ... i bought the pc as a complete unit with the rams preinstalled and when i searched the model number is saw that the two of them came as a kit.

[ChrisGreece52]

If they are not matched, I think you would need to put one in the first white slot, and the other in the first blue slot.

I did exaclty the same thing with matched ones.

[ChrisGreece52]

I installed today windos 7 64 bit (i had windows 7 32bit) because i wanted to take advantage of all my ram!!!
But when i went at system properties it said Ram : 2GB
My Pc Specs :
Windows 7 64bit
2 X 2 GB ram (KVR1333D3N9K2/4G)

Check the motherboard's manual to see if this memory is compatible (probably not).

It is the cards frequency is supported by the motherboard.

[ChrisGreece52]

I would try tweaking the bios ram settings.
-Disable dual/triple channel memory mode
-Increase the CAS
-maybe lower the mem clockrate if you can.
-Try reset the ram settings page to defaults.

I dont feel quite comfortable tweaking the bios just yet.Because i may screw my pc up ....

[amyk]

I can't see any of the images you posted several pages back. In particular, the SPD tab. If the EEPROM is corrupt for some reason or not being read properly the BIOS might not see that there's a matched set plugged in.

[nctnico]

Bad idea. For more than a decade memory modules have an eeprom on them telling the motherboard exactly what kind of memory is installed. If you have problems the memory is either defective or incompatible. It is that simple.

[nakchak]

Unsure if this has been suggested but always plug your ram into like coloured slots, i.e. on my mobo i have 2 blue and 2 black slots, 1 matched pair fills the blue slots, and one matched pair fills the black slots, also ensure that the pairs you are using are the same size, a 2gb and a 4gb stick wont work as a pair, it must be 2 2gb or 2 4gb sticks of ram to be a pair.

Finally if the ram is recognised in the bios but not by windows follow the instructions here http://www.sevenforums.com/hardware-devices/137552-windows-7-x64-not-recognizing-ram.html to ensure that the max ram switch is not set when you boot windows (i have seen this happen if you upgrade from a 32bit windows to 64bit, instead of doing a clean install)

nak.

[M. András]

along the  years i learned 2 things regarding pc builds, never buy a prebuilt one from supermarkets or other shit places instead build up your own what meets your current needs and budget, second buy the maximum amount of ram what a motherboard can support and the maximum speed rated rams for your cpu, natively now only the amd fx series processor have a native 1866mhz memory controller, intels only 1333mhz but it does not really matter while you dont get to make benchmarks all the time and aiming for the highest scores. memory bandwith and latency changes with their operating freqeuncy but not that huge amounts, mostly depends on the controller and the motherboard.

[ChrisGreece52]

I can't see any of the images you posted several pages back. In particular, the SPD tab. If the EEPROM is corrupt for some reason or not being read properly the BIOS might not see that there's a matched set plugged in.

Ill upload them again

[ChrisGreece52]

Bad idea. For more than a decade memory modules have an eeprom on them telling the motherboard exactly what kind of memory is installed. If you have problems the memory is either defective or incompatible. It is that simple.

Yeah but in my case the ram slot was bad.

[ChrisGreece52]

Unsure if this has been suggested but always plug your ram into like coloured slots, i.e. on my mobo i have 2 blue and 2 black slots, 1 matched pair fills the blue slots, and one matched pair fills the black slots, also ensure that the pairs you are using are the same size, a 2gb and a 4gb stick wont work as a pair, it must be 2 2gb or 2 4gb sticks of ram to be a pair.

Finally if the ram is recognised in the bios but not by windows follow the instructions here http://www.sevenforums.com/hardware-devices/137552-windows-7-x64-not-recognizing-ram.html to ensure that the max ram switch is not set when you boot windows (i have seen this happen if you upgrade from a 32bit windows to 64bit, instead of doing a clean install)

nak.

But the thing is when i inserted the ram to the colored one the bios recognized the ram

[ChrisGreece52]

along the  years i learned 2 things regarding pc builds, never buy a prebuilt one from supermarkets or other shit places instead build up your own what meets your current needs and budget, second buy the maximum amount of ram what a motherboard can support and the maximum speed rated rams for your cpu, natively now only the amd fx series processor have a native 1866mhz memory controller, intels only 1333mhz but it does not really matter while you dont get to make benchmarks all the time and aiming for the highest scores. memory bandwith and latency changes with their operating freqeuncy but not that huge amounts, mostly depends on the controller and the motherboard.

As for me i have this pc about 2 years and all i learned about pcs i did after buying this.... i wont make the same mistake again ... also about the ram frequency thing.... my motherboard supports many frequencies but i dont know what the freq in a ram is

[M. András]

basicly data rate, if i know it correctly each dimm is 64bit wide memory bus multiply that with the clock speed and you get the maximum data transger rate. if im wrong pls who knows it better correct me

[ChrisGreece52]

basicly data rate, if i know it correctly each dimm is 64bit wide memory bus multiply that with the clock speed and you get the maximum data transger rate. if im wrong pls who knows it better correct me

I am sorry but i did not get the point ....

[dr_p]

 

I dont feel quite comfortable tweaking the bios just yet.Because i may screw my pc up ....

No you won't. Just so you know what caused the problem, change ONE THING AT A TIME, then reset, see if it's better. If you get stuck, reset BIOS to default factory settings. If you really get stuck and can't enter BIOS, remember that usually 3 unsuccessful POST attempts lead to an automatic "restore to factory defaults".


As a matter of fact, when I get to a problematic PC and suspect some BIOS injustice, I just reset everything to make sure.

[IanB]

I dont feel quite comfortable tweaking the bios just yet.Because i may screw my pc up ....

No you won't.

Don't be so sure. I just this weekend bricked a PC beyond recovery. Something odd happened and the data on the disk got scrambled so badly that the boot information cannot be repaired and the file system on the main partition is destroyed so badly that chkdsk cannot fix it. And all I did to get in that state was to update the graphics driver...