Just tried putting in G-Skill DDRII800 PC2-6400 2048GB x2 RAM into my computer. Basically trying to upgrade from 2GB RAM to 4GB RAM. Well, I turn my computer on, and the screen responds with a "Check signal" indicator. So I take the new RAM out and put back in the old RAM, and the monitor turns on like clockwork. Any ideas why my new RAM is blocking signals to my monitor?

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Last edited by Krypton on Feb-11-2009 at 03:08

Did you actually "check signal" before changing the RAM back again?

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lol. "check signal" means your PC isn't booting up properly. ensure you've inserted the new ram properly. also, are you running x64 or vista? if not, 4bg is a waste.

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Your ram might not be the right speed. If the ram is not the right type then your computer wont know wtf to do when its booting.

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Originally posted by Joss Weatherby Your ram might not be the right speed. If the ram is not the right type then your computer wont know wtf to do when its booting.

any modern motherboard accepts ram of many different speeds.

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quote:

Originally posted by pkcRAISTLIN any modern motherboard accepts ram of many different speeds.

Very well and good, but it sounds like that is the issue.

And a lot of the times they can handle lower speeds, but not higher speeds. If he has a mobo that doesnt support at least PC6400 than he is SOL most likely.

i think im running 32 bits. Could that be it? I need to upgrade to 64 bits for my 4GB RAM to work?

I know for a fact i inserted them in correctly because they snapped in place. the connection between my monitor and computer were fine.

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quote:

Originally posted by Joss Weatherby And a lot of the times they can handle lower speeds, but not higher speeds. If he has a mobo that doesnt support at least PC6400 than he is SOL most likely.

sorry, that's incorrect. higher speed ram just runs at a slower speed. as long as his mobo supports DDR2, it will run all DDR2 ram. unless something drastic has changed in the last year or so, but 6400 ram is at least 2 years old, so i doubt it.

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quote:

Originally posted by Krypton i think im running 32 bits. Could that be it? I need to upgrade to 64 bits for my 4GB RAM to work?

not too sure; i dont think so though. you'll find such a system should work however it will only recognise 2Gb. try running 1 slot at a time, narrow it down to see whether the ram is faulty.

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quote:

Originally posted by pkcRAISTLIN sorry, that's incorrect. higher speed ram just runs at a slower speed. as long as his mobo supports DDR2, it will run all DDR2 ram. unless something drastic has changed in the last year or so, but 6400 ram is at least 2 years old, so i doubt it.

How many times have you used faster ram than your motherboard? I have seen people do it and not have their computers boot, even if they support DDR2.

It all depends on the quality of the motherboard, if its a shit motherboard its very unlikely it will work out of spec.

Clearly his ram is an issue here, otherwise he wouldnt have a problem.

Krypton, what kind of ram is your old ram?

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Originally posted by Krypton i think im running 32 bits. Could that be it? I need to upgrade to 64 bits for my 4GB RAM to work? I know for a fact i inserted them in correctly because they snapped in place. the connection between my monitor and computer were fine.

64 or 32 wont matter, I run XP32 with 4 gigs and it just doesnt see all of it, it sees 2.8 gigs.