I have an Epox 9NPA-Ultra running an Athlon64 (socket 939 San Diego) 3700+ CPU. This motherboard supports 4 DIMMs (ie 2 dual-channel pairs of memory).
For years I have been running 1GB via 2x512mb Kingston HyperX pc3200 RAM. Today I upgraded RAM in another system and moved two sticks of RAM to this system. The RAM is 2x512mb Corsair XMS Platinum pc3200 RAM. I stuck this into the 2 open slots on my Epox motherboard, booted Windows... and it says "1GB Ram." Tried CPUz, it only showed 1gb RAM and it showed the kingston RAM only.
Mmmm... so I pulled out the Kingston RAM. Now it sees the Corsair just fine. Moved the Corsair to Kingston's old spot, put the Kingston in... but still, it will only see 1gb of RAM. Then I decided to try 1 512mb Corsair stick, and 1 512mb Kingston stick. At this, the system just beeped at me and wouldn't start, giving me the C1 post code. I didn't find the manual terribly clear on this, listing nothing for just "C1" but rather "C1h", which states there is a problem with memory during the memory detection (size, type, and ECC). Possible solutions says "memory module inserted incorrectly", "memory compatibility problem", and "memory module damaged." Well by process of elimination, it must be a memory compatibility problem...
But hmm, since when are two pc3200 sticks not compatible? Also, if I match the dual channel pairs (the 2 kingston together + the 2 corsair together), shouldn't this not be a problem? The system starts/runs fine, but only one pair is accepted...
Why is this not recognizing all 4 sticks of RAM?
Again, my important specs are these:
Epox 9NPA-Ultra (athlon socket 939, DDR)
2x512mb Kingston HyperX DDR400/pc3200
2x512mb Corsair XMS Platinum DDR400/pc3200
* Trying to run all 4 512mb sticks for a total of 2gb of RAM, each in its own Dual Channel pair... all the RAM is confirmed good & working, but the motherboard will only see one pair at a time... why? please help so I can run all 4 sticks/2gb!!
For years I have been running 1GB via 2x512mb Kingston HyperX pc3200 RAM. Today I upgraded RAM in another system and moved two sticks of RAM to this system. The RAM is 2x512mb Corsair XMS Platinum pc3200 RAM. I stuck this into the 2 open slots on my Epox motherboard, booted Windows... and it says "1GB Ram." Tried CPUz, it only showed 1gb RAM and it showed the kingston RAM only.
Mmmm... so I pulled out the Kingston RAM. Now it sees the Corsair just fine. Moved the Corsair to Kingston's old spot, put the Kingston in... but still, it will only see 1gb of RAM. Then I decided to try 1 512mb Corsair stick, and 1 512mb Kingston stick. At this, the system just beeped at me and wouldn't start, giving me the C1 post code. I didn't find the manual terribly clear on this, listing nothing for just "C1" but rather "C1h", which states there is a problem with memory during the memory detection (size, type, and ECC). Possible solutions says "memory module inserted incorrectly", "memory compatibility problem", and "memory module damaged." Well by process of elimination, it must be a memory compatibility problem...
But hmm, since when are two pc3200 sticks not compatible? Also, if I match the dual channel pairs (the 2 kingston together + the 2 corsair together), shouldn't this not be a problem? The system starts/runs fine, but only one pair is accepted...
Why is this not recognizing all 4 sticks of RAM?
Again, my important specs are these:
Epox 9NPA-Ultra (athlon socket 939, DDR)
2x512mb Kingston HyperX DDR400/pc3200
2x512mb Corsair XMS Platinum DDR400/pc3200
* Trying to run all 4 512mb sticks for a total of 2gb of RAM, each in its own Dual Channel pair... all the RAM is confirmed good & working, but the motherboard will only see one pair at a time... why? please help so I can run all 4 sticks/2gb!!