64 bit Windows only recognising 4GB of RAM.

Hi All

I am guessing this is going to be a stupid question, so I do apologise in advance.

I have installed a full version of Home Prem 64 bit, but it only seems to want to detect 4GB of RAM. I only have 5GB installed at the moment, so it is not a great deal, but it is still confusing me.

Another strange part is that although it seems to be a 64bit install it looks like it has been set-up as a x86 not an x64 system.

Does this make any sense?

I have attached a few screen shots to show what I can see.

Thanks for your help, and again sorry if it is an obvious one, I am new to 7.

I see, so the reason I am not seeing the x64 program files, is because I have no 64 bit programs installed?. That make sense. But what about the 4GB of ram limit?

And its a desktop

Floydian42 said:

I see, so the reason I am not seeing the x64 program files, is because I have no 64 bit programs installed?. That make sense. But what about the 4GB of ram limit?

And its a desktop

C:\Program Files\ is your 64-bit (x64) program file folder. The other one is labeled (x86) to distinguish itself as the 32-bit folder for installation.

I have a PCI Express Sapphire Radeon HD5770 installed. And maximum memory is set to Zero. Could the problem be something to do with a bit of a mix and match of RAM? I have
2 * 1GB DDR2 @ 133MHz ( running duel channel I think ) ( I have had these for ages )
1 * 1GB DDR2 @ 200MHz and
1 * 2GB DDR2 @ 200MHz

Mobo is a Asus P5 B Deluxe if that helps any.

Your a legend.

That fixed the problem.

Thanks for your help Doc.

Floydian42 said:

I have a PCI Express Sapphire Radeon HD5770 installed. And maximum memory is set to Zero. Could the problem be something to do with a bit of a mix and match of RAM? I have
2 * 1GB DDR2 @ 133MHz ( running duel channel I think ) ( I have had these for ages )
1 * 1GB DDR2 @ 200MHz and
1 * 2GB DDR2 @ 200MHz

Mobo is a Asus P5 B Deluxe if that helps any.

I would suggest changing your RAM as what looks like to be a huge bottleneck. To be honest, I can't see how those are DDR2 speeds. To make matters worst, RAM can't run at different speeds. It has to take the lowest. If I may suggest to you some OCZ Reaper HPC RAM. Back in the days, when on special, you could get 4GB of 1066Mhz seed for roughly 50$ with shipping. You would want to check with your motherboard for compatibility. My motherboard is an Asus P5KC. IIRC, we should have the same NB chip and there should not be a problem. Hell, I'm running 6Gb of this stuff at 1120MHz at this very moment. 6.9 in Windows Performance Index for RAM if you are curious