vmanx7 Posted June 11, 2005 Share Posted June 11, 2005 I used to have two Samsung 512MB and Corsair 256MB PC2100 DDR266 memory sticks. Corsair memory went bad and I sent it for replacement. Corsair sent me a new memory sitck, thanks. However, now, my computer works with either memory, but it does not boot when I put two memory sticks together. If I put the Samsung in the Dim0 first memory slot and Corsair in the Dim1, bios screen comes but it stops after finding harddisks. If I put the Samsung in the Dim1 second memory slot and Corsair in Dim0, bios screen does not come, monitor stays off and harddisk light stays yellow. I try to change a few Bios settings but could not get any positive result. I will really appreciate any help. My computer works fine with either memory at either Dim. My computer setting is as following: Intel D845PEBT2 motherboard Intel Pentium 4 1.9Ghz 400Mhz front bus 256Kb cache Samsung K4H5608380-TCB0 PC2100 512MB DDR266 memory Corsair CM64SD256-2100 PC2100 256MB DDR266 memory Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted June 13, 2005 Corsair Employees Share Posted June 13, 2005 Please use the latest version of memtest.org and see what the bios is setting the timings to for each module. Then set them manually to the speed of the slowest module.. Link to comment Share on other sites More sharing options...
vmanx7 Posted June 13, 2005 Author Share Posted June 13, 2005 Thank you for your reply. memtest.org did not display the timings. I used PC Wizard 2005 to find the settings. For both of the memories, they are 6-3-3-2.5, which are set by the bios. I used 5-2-2-2 and some other combinations, but none of them helped. What I do not understand is either memory module booths with any settings I use. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted June 14, 2005 Corsair Employees Share Posted June 14, 2005 I would use CPU-Z and see what the SPD is set to for each module. Link to comment Share on other sites More sharing options...
vmanx7 Posted June 14, 2005 Author Share Posted June 14, 2005 Thank you for your reply. CPU-Z is giving the same results for both memory sticks. Max Bandwith: PC2100 (133Mhz) Correction: None Registered: No Buffered: No Frequency 100 133 CAS Latency 2.0 2.5 RAS# to CAS# 2 3 RAS# Precharge 2 3 TRAS# 5 6 The only difference I see is that PC wizard is reporting 7.8ms refresh rate for Samsung memory module, with respect to 15.625 ms refresh rate for Corsair. Samsung memory is 512MB and Corsair 256MB, that might be the reason. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted June 14, 2005 Corsair Employees Share Posted June 14, 2005 Might be but I would try and set the refresh to 15.625 Ms if you can and see if the system will pass http://www.memtest.org and you should set the timings manually as well. Link to comment Share on other sites More sharing options...
vmanx7 Posted June 15, 2005 Author Share Posted June 15, 2005 My Intel bios does not allow to change the refresh rate. I can only change the CAS timings and it has a burn-in mode. I manually modified all of these, but it did not resolve the problem. My computer does not pass the initial bootup so I cannot test both memory at the same time. I tested both memories individually with memtest and there was no error. Intel bios has memory test option during bootup. If I turn it on, I only see 256MB which probably is Corsair memory and bootup freezes. Link to comment Share on other sites More sharing options...
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