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installing ram
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Posted by: mighty
Just got a stick of 512 ram fom a friend (have 512 in machine to start with). Put it in and it's not recognizing it. Still says i have 512 ram. I have a intel 875 mobo with 4 slots for mem sticks. Any ideas of why it's not showing up?
Posted by: goranpaa
Are you sure its all the way down in the RAM slot and that it's the correct RAM?
What happends, if you remove your old RAM and just use the "new" stick?
If the PC refuses to boot, there is something wrong with the stick. You did remove yourself of statical electrisity before you touched the RAM stick did you? If not, you may have fried the stick.
If it works? then download "Memtest" and run it for 30 minutes as a safety precausion.
Memtest here.
http://hcidesign.com/memtest/download.html
Posted by: p3ngu!n
You sure he didn't give it to you to get rid of it because it was fried?
Posted by: ianelarazure
It could also be the type of RAM and amount not working here. Do you know the specifics on which Mobo you have? Check the manufacturers site and look for Maximum supported RAM. Or if you have the manual that works too.
Also look at your first stick that works, and check the speed on it, pc133, pc2700, pc4000, etc. Make sure your new stick matches it.
Posted by: shadysoldier
did you put the ram in the right slot?If they are not twins dont dual channel them.
Posted by: mighty
Thanks for all the feedback. It is working now, i think i didn't have it set in all the way. My new question is...it says i'm running a GB of ram now but when i first booted after the new stick was in it said the sticks need to be matched for it to run dual channel. Should i take the new stick out and move it over one slot so that it doesn't try to recognize it as a dual channel set up? Again thanks for the help this site rocks!
Posted by: goranpaa
As you have 1 gig of RAM working.
Then just ignore what bios says about dual channel. If you cant run dual channel. Maybe because the sticks are differnt speed for ex. Then it does'nt matter to wich slot you move the stick to. Moving it wont affect the performance in any way. You still will have single channel.
But what you can do, is to check out the RAM timings. Check the labels on the sticks. Make a note of the timings. ( like 3.0-3-3-6 for ex.) Then download CPU Z from the link below.
And use this software to compaire what the labels said and what CPU Z says about the timings?
You should look under the tab "memory" in CPU Z not "speed". And compaire it with the stick that got the lowest timings. If the sticks timings do differ that is?
Then, if you find that cpu Z gives different readings from what the label(s) say?
Check out bios, and see if you have the possibility to correct the timings?
Quite often, bios missreads the timings. And sets them to higher figures than the stock timings. This will slow down the RAM.
Also see if you have a setting in bios, that allows you to set the RAMs "command rate" to 1T or 2T?
If you can? Have the RAM set to 1T. This will improve performance further.
http://www.cpuid.com/cpuz.php
Posted by: shadysoldier
wait.if you have 2 sticks in dual chanel mode that arnt twins it will acually make it slower.
Posted by: goranpaa
No, the only thing that happends, is that they run in single mode and at the slower sticks speed.
Posted by: matt.modica
 Quote:
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Originally Posted by goranpaa
No, the only thing that happends, is that they run in single mode and at the slower sticks speed.
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Correct. Remember, the sticks have to be an EXACT match, so if they werent bought in pairs or aren't the same model chances are they won't run in dual channel. If you put them in dual channel pair slots, they just will run in single channel mode.
You probably didn't push down hard enough when installing the RAM. You need to push down HARD (but don't hammer the sticks) with desktop RAM, untill it goes in and the clips move into place.
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