Question about Asrock 845GV (P4I45GV) Motherboard

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PC Getting restart after installing RAM of different speed

MyPC is getting restart everytime I put on, few after installing 512MB RAM with 400 MHz Speed. As per installation guide my motherboard (Asrock 845GV) supports RAM with speed 333MHz. My delear said that it will support. Please help me what should I do, what could be the problem ? Is my RAM faulty ? or my motherboard doesnot support high speed RAM ? My dealer says to change Jumper setting. Please help.

Posted by Sunil Shastri on



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1. Make sure the memory is seated firmly in the motherboard and the clips are fastened. 2. When it boots up try to hit the key to get you into the CMOS setup screen. If you make it in the CMOS setup save and exit. 3. Follow the motherboard instructions to clear the CMOS. Involves jumper or removing battery etc.. the process varies with manufacture and model. If it starts working check the capacitors on the motherboard to see if they are blown on the bottom, leaking brownish gunk or bloated. 4. Put the old memory back in and see if it works normally. May not be compatable or backwards compatible.

Posted on May 15, 2007


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I am using D102GGC2 Desktop board with Intel Pentium D Processor 2.8GHz and using 512MB DDR2 PC-533 RAM. Nw I want to upgrade to 2GB and decided to purchase 2 * 1GB DDR2 PC-667 RAM. Will it be compati

Hello here is the homepage:

You can only add 1gb per slot Because the mb does not supports a bigger module.
This ram type does come as 1 gb module.
The 667 mhz and 800 mhz is the Mhz speed for the ram module.
Your mainboard supports this but it will only run the current front side bus speed as the mainboard supports.
This means that the new ram will only run 533/400 mhz as the mb supports.

Hope this was helpfull

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I bought a new 1GB ram(DD2) when i insert it it nt work bt whenever i insert it with old 512MB ram then its work bt in bios setting only show the 1GB ram

Maybe 1GB is the maximum amount of memory that your system will hold. And maybe your system likes memory to be in pairs, so when you put the 1GB in by itself it didn't work, but when you put it in with a 512MB it works.

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I have 2 pcs of RAM, 512MB and 1GB. then my pc has 4 slot. Can I install both 1GB and 512MB?

yes you can install it but issue is that . Is your computer supports the both bus peed first check the bus speed for checking bus speed you can see a steker on ram on that print will start form like

512. 400. its it speed is 512mb and buss speed is 400
if your 1gb ram is also 400 bus speed its mean it will run your computer smoothly.
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2 Answers

I upgraded my RAM to 1 Gig but it's still showing only 256 meg. Why?

Hi this model sopport 2Gig Memory Ram.

RAM Technology DDR SDRAM Installed RAM 512 MB Max Supported RAM 2 GB Number of Memory Slots 2 x DIMMs Supported RAM Speeds 400 MHz • 333 MHz Installed Cache Memory 256 KB
RAM Technology DDR SDRAM Installed RAM 512 MB Max Supported RAM 2 GB Number of Memory Slots 2 x DIMMs Supported RAM Speeds 400 MHz • 333 MHz Installed Cache Memory 256 KB
RAM Technology DDR SDRAM Installed RAM 512 MB Max Supported RAM 2 GB Number of Memory Slots 2 x DIMMs Supported RAM Speeds 400 MHz • 333 MHz Installed Cache Memory 256 KB
RAM Technology DDR SDRAM
Installed RAM 512 MB
Max Supported RAM 2 GB
Number of Memory Slots 2 x DIMMs
Supported RAM Speeds 400 MHz • 333 MHz
Installed Cache Memory 256 KB

Please check in to your Bios system maybe share memory Video or capacity is setting

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Please enter the service tag on and find the manual and the right memory for your PC

All the best!

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