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Attempted to upgrade RAM on a custom built PC, but new RAM would not allow PC to boot. Now I returned all the old RAM back as it was before, and I’m still getting 3 beeps and will not boot. It worked fine before I attempted RAM upgrade, I tried reseating all RAM and PCI cards. Please help! Update (04/19/2021) I’d have to actually check the make of the motherboard, I’m not sure it was a custom built unit that I bought. Yes I had everything unplugged before inserting the RAM. I have 4 memory sticks filling all 4 slots, equaling 8gb. I tried to upgrade it to 12gb by replaced two of the 2gb with a couple of 4gb sticks. But since they didn’t seem to be recognized, I just replaced the old RAM back in, but now I can’t get it to start back up with the old RAM.
Hi, Try a power refresh in case the BIOS has become corrupted for some reason. Disconnect the power from the PC and then remove the coin cell battery from the motherboard. Remember the orientation, usually it is +ve on top. Then press and hold the PC’s Power on button for a full 15 seconds and then release. Reinsert the coin cell battery. Only have memory in the 1st and 3rd slots as viewed from the CPU. Reconnect the power and turn on the PC and check if it POSTs OK (Power On Self Test). If it now starts OK, then turn off the PC and disconnect the power and then insert the other 2 ram modules, reconnect the power and check again If still no good, turn off the PC and disconnect the power and remove the 2 ram modules from slot 1 & 3 and insert the other 2 ram modules into slots 1 & 3. Note: There needs to be a ram module in Slot 1 as it won’t work at all without one being there
Just experienced this same issue. When my 2 sticks of ram would not boot my PC I inserted only one stick to try and it worked. In the end i found out that the ram is not compatible with my motherboard CPU combo. Check the compatibility for your system.
The most common reason for this is incorrect placement within the existing slots. This is most often seen with either the number of sticks is less than slots or there is a mix of stick densities. Be sure that the memory stick(s) are in the correct slots. As an example, lets assume that there are 4 slots. These are usually bank 0 and bank 1 in the following pattern: 0 1 0 1. If you place 2 sticks in the first 2 slots there will be a stick in bank 0 and another in bank 1. Some motherboards like this, some require the backs to be filled. In other words the two sticks should be in slot 0 and 2 to fill in bank 0. Check the motherboard to be sure that the sticks are placed correctly. There are other potential problems, but start as listed above and report back the results.
If the motherboard is a DP35DP, then 3 beeps is a memory error, as @abrsvc pointed out. The beep codes for your motherboard, what they mean, and what you can do about them can be found on a chart at: https://www.intel.com/content/www/us/en/…
Hi David, Further to the above suggestions from @abrsvc, @dancomptia and @jayeff, I had a look up online in relation to System Memory for Intel DP35DP. The article is given below. System Memory for the Intel® Desktop Board DP35DP According to the article, the maximum memory Intel DP35DP Board supports is 8GB (thought this might be helpful with regard to memory upgrade). All the best!
