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Can anyone help? New memory will not work! Gateway 831GM. 3 GHZ Proc.

post #1 of 25
Thread Starter 
My Gateway came with 2 DDR 256 MB 400MHZ PC3200 chips. There are 4 slots and they were both in the slots with the white clips. I don't know if the other black clips are for a different type of RAM or what.

I just purchased a 1GB chip. 400 MHZ. PC3200. I tried every configuration of RAM slots and I cannot get it to work. What happens is Windows loads, then when it is about to get the desktop, it restarts or in other cases it gave me a stop code error.

I know the RAM is snapped into place correctly and I have checked in the BIOS to see if the MoBo recognized the RAM. For every configuration, it did recognize the RAM in BIOS but it just would not load Windows.

My hypothesis is that this particular Mobo does not accept mixing RAM sizes on the slots. It needs to have all the same sizes in all the ports. ex: "slot 1 = 256MB CHIP, slot 2 = 256MB CHIP, slot 3 = 256MB CHIP, slot 4 = 256 MB CHIP.

According to online specs for this machine, the Mobo allows up to 4GB of RAM.

I DONT GET IT! Can someone help explain what could be wrong or if my hypothesis is correct! Thanks!



Nick
post #2 of 25
Quote:
Originally Posted by nicokillips
My Gateway came with 2 DDR 256 MB 400MHZ PC3200 chips. There are 4 slots and they were both in the slots with the white clips. I don't know if the other black clips are for a different type of RAM or what.

I just purchased a 1GB chip. 400 MHZ. PC3200. I tried every configuration of RAM slots and I cannot get it to work. What happens is Windows loads, then when it is about to get the desktop, it restarts or in other cases it gave me a stop code error.

I know the RAM is snapped into place correctly and I have checked in the BIOS to see if the MoBo recognized the RAM. For every configuration, it did recognize the RAM in BIOS but it just would not load Windows.

My hypothesis is that this particular Mobo does not accept mixing RAM sizes on the slots. It needs to have all the same sizes in all the ports. ex: "slot 1 = 256MB CHIP, slot 2 = 256MB CHIP, slot 3 = 256MB CHIP, slot 4 = 256 MB CHIP.

According to online specs for this machine, the Mobo allows up to 4GB of RAM.

I DONT GET IT! Can someone help explain what could be wrong or if my hypothesis is correct! Thanks!



Nick
You're going to have to do a little detective work before I can help you. Do you have CPU-Z loaded on your computer? If so, show me a screenshot of the SPD settings with JUST the old sticks in. That will tell me the stock timings and voltage of the old stuff. After you've done that, please do the same thing with JUST the new stick in your computer.

When you select SPD (Serial Presence Detect) in your BIOS, your motherboard will look for a chip on the first stick of ram it sees and will load default voltage and timings based off of the values listed in that table. If your new stick needs looser timings or higher voltage, then that will explain why it will not boot properly. You CAN mix sizes, timings, etc, but before I help you with the settings, please provide the 2 screenshots I've asked for. I don't want to overvolt your old ram, so this is the safest way. Btw, for performance reasons, you usually want to put the biggest stick first, but we'll deal with that later.
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My System
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post #3 of 25
Thread Starter 
Ok, here are the screenshot of what you requested. Right now, I have 2 256chips in right now. They are labeled 400mhz but in CPUZ it says the maximum speed is 200mhz. Well in any case, here are the screen shots.

slot1 =

slot3=

I hope this is what you need to help me. Thank you for your fast reply! It is MUCH appreciated!

Nick
post #4 of 25
Thread Starter 
I cannot get my RAM chip to load windows.SO I cannot give you a screenshot on that. Sorry.. BIOS does recognize it though, but no matter what config I try, nonework with the new ram. THANKS!

Nick
post #5 of 25
The reason ( i think ) that it says your speed is 200mhz is simple because you mobo cannot support that much ram at 400mhz.
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post #6 of 25
Thread Starter 
So should I get slower RAM? Would that solve the problem?
post #7 of 25
Did you try the system with only the new RAM? And if that works, please post another CPU-Z screenshot.

Also, you mentioned black and white memory banks: These color codings indicate that if you put two memory sticks in two slots with the same color, the RAM will run dual channel. That's why the sticks were in the white slots. When you add the 1GB stick, or you run that stick single, you will run single channel. If the 1GB stick works withouth the 2x256MB, it might be an idea to buy a second 1GB stick (same brand/type) and get rid of the 2x256. That way you will be able to run 2 GB dual channel.

Finally, CPU-Z reports 200 MHz for the RAM, since that is the FSB. The RAM is DDR means Double-Data Rate, which means that it doubles the effective speed (thus 400 MHz). The real explanation is more technical, but this suffices.
    
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post #8 of 25
No. Do not get slower ram. I have a ****** dell computer. And i once had the same problem. You are going to need the same type of ram in each slot. So if you want a gig you could do a 256 in each slot giving you 1 gig. Or 2 512 sticks. Or 1, 1 gig stick.

This is the case with lots of mainstream computers (dell/HP/Compaq etc. )

You cannot mix and match ram.

Also, http://www.crucial.com/systemscanner/ check it to accept and hit next. they will scan your system (it's safe ) and then they will list the type of memory that your motherboard will support. The memory is GUARANTEED to work with your system.
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post #9 of 25
Thread Starter 
I see... Can I change the RAM setting to Single Channel in the BIOS? Would that enable just the 1 GB chip to work if I had no RAM in the other channel?
post #10 of 25
Ok, so I understand that the single stick of 1GB does not work. My guess is that this stick is double sided, and that your Motherboard does not support that. I would be interested to know what Motherboard Gateway used, and what brand and type the 1GB stick is.

A utility such as SISSandra will report the Motherboard brand and type.

good luck
    
CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
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N/A Corsair HX520 Coolermaster Cavalier N/A 
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E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
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