Drewy Posted July 8, 2009 Share Posted July 8, 2009 Hi I am attempting to increase the ram on my PC. I have been running Dominator Twin2x4096-8500C5D. I purchased another set of ram the only difference being is the version number. the original ver 2.1 the new ver is 2.2 When I install the new ram I get main bios checksum error and the PC reboots and then continually loops with a message scanning bios image from hard drive. If I remove either pair of ram the PC works fine but when both pairs are installed (8gig) I get the checksum error. If I remove 1 ram chip ie 6 gig remaining the PC works I am unable to get to the bios as it remains in a loop. These sticks are in the Corsair compatabilty list. Any help please. Link to comment Share on other sites More sharing options...
Synthohol Posted July 8, 2009 Share Posted July 8, 2009 have a read :): http://forum.corsair.com/v3/showthread.php?t=79730 Link to comment Share on other sites More sharing options...
Wired Posted July 8, 2009 Share Posted July 8, 2009 Is 2.1/2.2 the version, or the memory voltage for each pair? What voltage are you running the memory at? Try dropping the speed to 800 to relieve some stress on the memory controller. Link to comment Share on other sites More sharing options...
Drewy Posted July 9, 2009 Author Share Posted July 9, 2009 Hi They are the version numbers. The voltage I am running them at is 1.8. After much reading I managed to drop the speed to 800 as suggested by your good self and the system now works except it is slower. Am I right in assuming that the processor is now slower? I have a duel boot system one is 32 bit the other is 64 bit. I use the 64 bit for my photo editing program (Photoshop) and hoped the increase in ram would enhance it. But this does not seem to be the case. I am slightly dissapointed that Corsair list this ram in their compatability list and wrongly assumed that it would work straight out of the box. I am reluctant to purchase different ram as I am concerned the same thing will happen. Any advice on which ram to get would be very much appreciated. John Link to comment Share on other sites More sharing options...
Synthohol Posted July 9, 2009 Share Posted July 9, 2009 that ram requires 2.1v that can be an issue all by itself :): Link to comment Share on other sites More sharing options...
Drewy Posted July 9, 2009 Author Share Posted July 9, 2009 Hi As you have guessed I am a novice at this. I have been running 4 gig of this ram and all has been OK for the last 2 months. Why should adding an extra 4 gig cause these problems. If I increase the voltage to 2.1 would this sort it? Wired suggested running at 800 which does work but is certainly slower. John Link to comment Share on other sites More sharing options...
Synthohol Posted July 9, 2009 Share Posted July 9, 2009 hey we all had to start somewhere! i was just pointing out that you are undervoltong the ram so it may not perform up to spec. mixing ram is another story. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted July 9, 2009 Corsair Employees Share Posted July 9, 2009 Synthohol is right, try 2.1v first. If the problem remains, then try setting the memory frequency to DDR2 800. There will be a lot more stresses on the memory controller on the motherboard when all memory slots are filled; to compensate for these stresses, memory controller will need to run these modules at a slower speed. Link to comment Share on other sites More sharing options...
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