xtfhk123 Posted January 23, 2006 Share Posted January 23, 2006 Hi I got an t690 system of Hewlett Packard, I recently bouight one module 512 MB DDR PC3200 400 Mhz Code: VS512MB400, so now i got 3 modules in total 1,5 GB. only when i stick it in the MB, i see in the bios all modules are recognized only the speed is set back to PC2700? now i saw the module select test configurator on corsair site, only this give me the recommendatrions of a CMS512400 module, only these modules are not able to be bought in The netherlands, and This one matches the specs so any one know why and how to do now, the shop is called mycom and only sells Corsair modules. btw updated the most recent bios update already did not work..but system works fine though... do i need to buy another stick of 512 mb 400 mhz to make it work on PC3200 instead of 2700? if i just leave 1 module of 512 in it and add the corsair 512 mb one makes total of 1024MB, it still is on 2700 what do i need to do? exactly cause im a computer noob Link to comment Share on other sites More sharing options...
RJLeong65 Posted January 23, 2006 Share Posted January 23, 2006 Hi I got an t690 system of Hewlett Packard, I recently bouight one module 512 MB DDR PC3200 400 Mhz Code: VS512MB400, so now i got 3 modules in total 1,5 GB. only when i stick it in the MB, i see in the bios all modules are recognized only the speed is set back to PC2700? now i saw the module select test configurator on corsair site, only this give me the recommendatrions of a CMS512400 module, only these modules are not able to be bought in The netherlands, and This one matches the specs so any one know why and how to do now, the shop is called mycom and only sells Corsair modules. btw updated the most recent bios update already did not work..but system works fine though... do i need to buy another stick of 512 mb 400 mhz to make it work on PC3200 instead of 2700? if i just leave 1 module of 512 in it and add the corsair 512 mb one makes total of 1024MB, it still is on 2700 what do i need to do? exactly cause im a computer noob Actually, you're limited to only 2 sticks total at PC3200 speed. If you install more than 2 sticks, your memory clockspeed will drop to PC2700 speed - and with your OEM system, there is no way at all whatsoever to manually override the memory speed selection! Sorry, but this is a limitation of all PC3200 chipsets and memory controllers. In addition, with three sticks you're running your memory in single-channel mode, since Intel's dual-channel chipsets only support memory installed in pairs in dual-channel mode. Link to comment Share on other sites More sharing options...
xtfhk123 Posted January 24, 2006 Author Share Posted January 24, 2006 Actually, you're limited to only 2 sticks total at PC3200 speed. If you install more than 2 sticks, your memory clockspeed will drop to PC2700 speed - and with your OEM system, there is no way at all whatsoever to manually override the memory speed selection! Sorry, but this is a limitation of all PC3200 chipsets and memory controllers. In addition, with three sticks you're running your memory in single-channel mode, since Intel's dual-channel chipsets only support memory installed in pairs in dual-channel mode. so what if stick three stick haveing total 1,5 GB 2700 is it better performing than 2x 512 MB 400 Mhz? and how can I get 1,5 Gb memory? since i cannot afford 2 GB would 1x 512 mb 1x 1 gb work? or need to buy another 512 mb? having 4x 512 mb? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 24, 2006 Corsair Employees Share Posted January 24, 2006 It would be best to run 2-512 meg modules or 2-1.0 Gig module, running at DDR400. Link to comment Share on other sites More sharing options...
xtfhk123 Posted January 24, 2006 Author Share Posted January 24, 2006 would you know if it would perform better 1,5 GB with PC2700 or 1 GB PC3200? just want to know that Link to comment Share on other sites More sharing options...
RJLeong65 Posted January 24, 2006 Share Posted January 24, 2006 so what if stick three stick haveing total 1,5 GB 2700 is it better performing than 2x 512 MB 400 Mhz? and how can I get 1,5 Gb memory? since i cannot afford 2 GB would 1x 512 mb 1x 1 gb work? or need to buy another 512 mb? having 4x 512 mb? Unfortunately, there is no easy way to get 1.5GB and running at full speed and performance. With your present 1.5GB, you're not only running at PC2700 speed, but you're also running single-channel instead of dual-channel. You're running your memory at less than half the total bandwidth needed to take full advantage of your particular CPU (2.66GB/s for single-channel PC2700 memory versus 6.4GB/s for your processor's FSB - a serious mismatch), which will bottleneck your overall system performance. And even with four sticks in dual-channel, the clockspeed will remain PC2700, which would result in a 5.33GB/s maximum memory bandwidth. That's still lower than the maximum bandwidth of your processor's FSB. Thus, it's best to run only two sticks of memory - and in dual-channel mode. Link to comment Share on other sites More sharing options...
xtfhk123 Posted January 24, 2006 Author Share Posted January 24, 2006 Unfortunately, there is no easy way to get 1.5GB and running at full speed and performance. With your present 1.5GB, you're not only running at PC2700 speed, but you're also running single-channel instead of dual-channel. You're running your memory at less than half the total bandwidth needed to take full advantage of your particular CPU (2.66GB/s for single-channel PC2700 memory versus 6.4GB/s for your processor's FSB - a serious mismatch), which will bottleneck your overall system performance. And even with four sticks in dual-channel, the clockspeed will remain PC2700, which would result in a 5.33GB/s maximum memory bandwidth. That's still lower than the maximum bandwidth of your processor's FSB. Thus, it's best to run only two sticks of memory - and in dual-channel mode. So get things straight, My mother board supports, 4 DIMM MOdules, I know have currently installed Infineon ones which was with the system 2x 512 MB DDR 400 so if i buy 2x pair 400 Mhz 512 MBH of Corsair it still wouldn't be 400 Mhz OC 3200 2 GB totally? even if all Banks are DIMM...? and memory DDR SD, cause the sites of Hp says it supports 4 GB and 4 DIMM modules...so strange. Cause what I undertsand is if i am running dual channel the speed is 400 Mhz which is PC3200 if i run single channel the speed reduces back to 333 mhz which is 2700 but your talking about even when i am installed all 4 banks and running dual channel my speed still is 2700? could you explain that? but is it true there might be possiblty that it can run pc3200 400 Mhz with 6 mdules of 512 MB total of 2 GB standardly without tweaking things? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 25, 2006 Corsair Employees Share Posted January 25, 2006 If you install more than 2 ranks of memory per channel the memory controller will by default slow the memory down becasue of loading on the memory. And all of our 512 Meg and larger module are double rank at this time. Link to comment Share on other sites More sharing options...
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