Ram problem

spotty161 · 11-26-2008, 09:27 PM

Help please

My motherboard supports
2 x 240-pin DIMM sockets support unbuffered non-ECC 400/533 MHZ DDR2 memory modules

i had a 1gb ram from kingston, 533MHZ. recently i bought another 1gb ram also from kingston 667MHZ. after plugging them in, BIOS says 'not installed' for one of the slots.

could it be that the ram is incompatitable?
however, when i tried with only the 667 ram, it works.
what could be the problem? thank you

**belfasteddie** · 11-27-2008, 12:56 AM

The ram you are using is backward compatible. Place the 667 in the 1st slot and then the 533 in the 2nd slot.Both will/should run at the lower speed.

spotty161 · 11-29-2008, 12:17 AM

I did as you told and placed the 667 in 1st slot and 533 in 2nd slot. however, BIOS still says that "Memory Slot 2" is 'Not Installed'. and my computer properties says that i haf 1gig ram.

whats the problem?

**wrench97** · 11-30-2008, 10:41 AM

What brand/Model is your motherboard or PC?

spotty161 · 11-30-2008, 08:42 PM

er its a Compaq Presario SR1955AP Desktop PC.
the motherboard specs are on this website

http://h10025.www1.hp.com/ewfrf/wc/d...roduct=3330125

techkingston08 · 12-03-2008, 06:07 PM

In theory this computer is suppose to clock down to 533 if both speeds are installed together. However, occasionally you'll have a motherboard that might be a bit finicky about it and not run stable if different speeds are installed. If both modules work alone then you know the issue is directly related to the two sticks working together. The solution is to match them up and use the same speed. Return the 667 and buy another 533.

11-26-2008, 09:27 PM	#1 (permalink)
spotty161 Registered User Join Date: Nov 2008 Posts: 5 OS: xp	Ram problem Help please My motherboard supports 2 x 240-pin DIMM sockets support unbuffered non-ECC 400/533 MHZ DDR2 memory modules i had a 1gb ram from kingston, 533MHZ. recently i bought another 1gb ram also from kingston 667MHZ. after plugging them in, BIOS says 'not installed' for one of the slots. could it be that the ram is incompatitable? however, when i tried with only the 667 ram, it works. what could be the problem? thank you

11-27-2008, 12:56 AM	#2 (permalink)
belfasteddie Enthusiast Join Date: Aug 2007 Location: Belfast N.I. Posts: 1,551 OS: Puppy Linux 4.12	Re: Ram problem The ram you are using is backward compatible. Place the 667 in the 1st slot and then the 533 in the 2nd slot.Both will/should run at the lower speed.

11-29-2008, 12:17 AM	#3 (permalink)
spotty161 Registered User Join Date: Nov 2008 Posts: 5 OS: xp	Re: Ram problem I did as you told and placed the 667 in 1st slot and 533 in 2nd slot. however, BIOS still says that "Memory Slot 2" is 'Not Installed'. and my computer properties says that i haf 1gig ram. whats the problem?

11-30-2008, 10:41 AM	#4 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,489 OS: Win7	Re: Ram problem What brand/Model is your motherboard or PC? __________________ Power Supply and Selection

11-30-2008, 08:42 PM	#5 (permalink)
spotty161 Registered User Join Date: Nov 2008 Posts: 5 OS: xp	Re: Ram problem er its a Compaq Presario SR1955AP Desktop PC. the motherboard specs are on this website http://h10025.www1.hp.com/ewfrf/wc/d...roduct=3330125

12-03-2008, 06:07 PM	#6 (permalink)
techkingston08 Registered User Join Date: Nov 2008 Posts: 16 OS: Win XP SP2	Re: Ram problem In theory this computer is suppose to clock down to 533 if both speeds are installed together. However, occasionally you'll have a motherboard that might be a bit finicky about it and not run stable if different speeds are installed. If both modules work alone then you know the issue is directly related to the two sticks working together. The solution is to match them up and use the same speed. Return the 667 and buy another 533.