darklegion Posted October 15, 2007 Share Posted October 15, 2007 Hello everyone, I'm having a nightmare with vista :mad:... I recently build a pc, these are some of parts: Intel Core 2 Extreme QX6850 ASUS Striker Extreme EVGA 768-P2-N887-AR GeForce 8800Ultra ---- x2 CORSAIR XMS2 4GB(2 x 2GB) 240-Pin DDR2 --- x2 At first i install vista with 2 gb of ram, everything was fine, after installing all driver and updates I when to install a second chip of 2gb for a total of 4gb. Right after when vista first booted up it gave me a blue screen and restarted the pc, but the second time it worked and vista recognize 4gb of ram. Then i when to install 2 more chips of 2gb each for a total of 8gb. This time vista would not load and it keeps giving me a bluescreen that flashed for about 1 haft of a second before reseting the pc. On the other hand the BIOS does recognizes the 8gb of ram. I'm 100% sure it is not the memory chips since i have tested all of them separately. Please someone help me..... Link to comment Share on other sites More sharing options...
darklegion Posted October 15, 2007 Author Share Posted October 15, 2007 Hello everyone, I'm having a nightmare with vista :mad:... I recently build a pc, these are some of parts: Intel Core 2 Extreme QX6850 ASUS Striker Extreme EVGA 768-P2-N887-AR GeForce 8800Ultra ---- x2 CORSAIR XMS2 4GB(2 x 2GB) 240-Pin DDR2 --- x2 At first i install vista with 2 gb of ram, everything was fine, after installing all driver and updates I when to install a second chip of 2gb for a total of 4gb. Right after when vista first booted up it gave me a blue screen and restarted the pc, but the second time it worked and vista recognize 4gb of ram. Then i when to install 2 more chips of 2gb each for a total of 8gb. This time vista would not load and it keeps giving me a bluescreen that flashed for about 1 haft of a second before reseting the pc. On the other hand the BIOS does recognizes the 8gb of ram. I'm 100% sure it is not the memory chips since i have tested all of them separately. Please someone help me..... Link to comment Share on other sites More sharing options...
DerekT Posted October 15, 2007 Share Posted October 15, 2007 Please post the exact model of your DRAM. Link to comment Share on other sites More sharing options...
DerekT Posted October 15, 2007 Share Posted October 15, 2007 Please post the exact model of your DRAM. Link to comment Share on other sites More sharing options...
darklegion Posted October 15, 2007 Author Share Posted October 15, 2007 CM2X2048-6400C5DHX XMS2-6400 2048MB 800MHz 5-5-5-18 that is all there is on the back of the chip. so. Is there a way to make vista work with 8gb of ram?? Thank a lot in advance. BTW RAMGUY come on please, i need help over here Link to comment Share on other sites More sharing options...
darklegion Posted October 15, 2007 Author Share Posted October 15, 2007 CM2X2048-6400C5DHX XMS2-6400 2048MB 800MHz 5-5-5-18 that is all there is on the back of the chip. so. Is there a way to make vista work with 8gb of ram?? Thank a lot in advance. BTW RAMGUY come on please, i need help over here Link to comment Share on other sites More sharing options...
Wired Posted October 15, 2007 Share Posted October 15, 2007 You may have to underclock it to appease the memory controller. BTW, why 8 GB? Also, give Ram Guy time to respond, he's busy ya know :) Link to comment Share on other sites More sharing options...
Wired Posted October 15, 2007 Share Posted October 15, 2007 You may have to underclock it to appease the memory controller. BTW, why 8 GB? Also, give Ram Guy time to respond, he's busy ya know :) Link to comment Share on other sites More sharing options...
Dazz Posted October 15, 2007 Share Posted October 15, 2007 Yeah i had problems with 1x4 and had to clock them at 667MHz, chances are you have too as well. Noticed you have a nForce 680i board YOU MUST clock the chips to 667MHz. Link to comment Share on other sites More sharing options...
Dazz Posted October 15, 2007 Share Posted October 15, 2007 Yeah i had problems with 1x4 and had to clock them at 667MHz, chances are you have too as well. Noticed you have a nForce 680i board YOU MUST clock the chips to 667MHz. Link to comment Share on other sites More sharing options...
darklegion Posted October 15, 2007 Author Share Posted October 15, 2007 that is an option "Wired". 1 reason why i got 8gb because i wanted to get the max my MB could handle, and also i do a lot of rendering plus other things. I don't mean to rush RAMGUY but I'm desperate to fix this :biggrin: Link to comment Share on other sites More sharing options...
darklegion Posted October 15, 2007 Author Share Posted October 15, 2007 that is an option "Wired". 1 reason why i got 8gb because i wanted to get the max my MB could handle, and also i do a lot of rendering plus other things. I don't mean to rush RAMGUY but I'm desperate to fix this :biggrin: Link to comment Share on other sites More sharing options...
DerekT Posted October 15, 2007 Share Posted October 15, 2007 With 4 X 1024, you will very likely have to drop to 667Mhz to make a fit. Sometimes it works but not very often. Usually you have to drop a speed level as he memory controller can not keep up with the extra DRAM at the rated speed. You will need to drop the speed of the DRAM from 800Mhz to 667Mhz. If you had purchased 4 X 1024MB of PC8500 (1066Mhz) DRAM, then you would have had to drop to PC6400 (800MHz) DRAM, etc. 2 X 2048 will not usually issue this problem. This is a problem of all 4 banks being populated. Think of it this way. If you have a small phone book, then when you go into the index to find the page where you will find the phone number you are doing so at a certain speed due to the pages of the Index. Then you have to drive through the pages to get to the number. Now if your index is twice as large and the pages twice as many, then it takes longer to access the data. Now DRAM has a Strobe and the length of the strobe is how long the rows and columns can be left open before they must be refreshed. There is not enough time for the dram to be refreshed and then accessed with 4GB at the full access speed of the DRAM. The chipsets are optimized for 2GB, not 4GB and for 2 DRAM slots, not 4 DRAM slots populated. You can overclock the FSB (and hence the Memory Controller Hub = MCH) to gain some extra bandwidth and thus access the capabilities of the DRAM since the chipset is now clocked up. Usually when you clock up the FSB and concurrently the Memory Controller Hub (MCH) you need to raise the voltages of the CPU/MCH a bit as well. Link to comment Share on other sites More sharing options...
DerekT Posted October 15, 2007 Share Posted October 15, 2007 With 4 X 1024, you will very likely have to drop to 667Mhz to make a fit. Sometimes it works but not very often. Usually you have to drop a speed level as he memory controller can not keep up with the extra DRAM at the rated speed. You will need to drop the speed of the DRAM from 800Mhz to 667Mhz. If you had purchased 4 X 1024MB of PC8500 (1066Mhz) DRAM, then you would have had to drop to PC6400 (800MHz) DRAM, etc. 2 X 2048 will not usually issue this problem. This is a problem of all 4 banks being populated. Think of it this way. If you have a small phone book, then when you go into the index to find the page where you will find the phone number you are doing so at a certain speed due to the pages of the Index. Then you have to drive through the pages to get to the number. Now if your index is twice as large and the pages twice as many, then it takes longer to access the data. Now DRAM has a Strobe and the length of the strobe is how long the rows and columns can be left open before they must be refreshed. There is not enough time for the dram to be refreshed and then accessed with 4GB at the full access speed of the DRAM. The chipsets are optimized for 2GB, not 4GB and for 2 DRAM slots, not 4 DRAM slots populated. You can overclock the FSB (and hence the Memory Controller Hub = MCH) to gain some extra bandwidth and thus access the capabilities of the DRAM since the chipset is now clocked up. Usually when you clock up the FSB and concurrently the Memory Controller Hub (MCH) you need to raise the voltages of the CPU/MCH a bit as well. Link to comment Share on other sites More sharing options...
darklegion Posted October 15, 2007 Author Share Posted October 15, 2007 Thank you DerekT. I read this post before but i didn't think it would apply in this case. I will wait and see what ramguy suggest. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 15, 2007 Corsair Employees Share Posted October 15, 2007 Do you have the patch installed for 3 Gig or more of memory? And what s the complete system configuration? Link to comment Share on other sites More sharing options...
darklegion Posted October 16, 2007 Author Share Posted October 16, 2007 Hi RAMGUY thanks for replying. I do have installed the patch so that vista will read 3gb or more (How much more??), I know this because i currently have 4gb installed on it and it works fine. It is when I install the other 4gb for a total of 8gb when it dosent work. If by complete system configuration you mean all parts here it goes: CPU: Intel Core 2 Extreme QX6850 Kentsfield 3.0GHz 2 x 4MB L2 Cache LGA 775 MB: SUS Striker Extreme LGA 775 NVIDIA nForce 680i SLI ATX RAM:CORSAIR XMS2 4GB(2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) x2 VC: EVGA GeForce 8800Ultra 768MB 384-bit GDDR3 PCI Express x16 SLI Ready x2 PSU: Thermaltake Toughpower W0133RU ATX12V / EPS12V 1200W HD: Western Digital Caviar SE16 320GB 7200 RPM 16MB Cache SATA x2 Monitor: SAMSUNG 226BW Black 22" 2 ms (GTG) DVI Widescreen LCD Monitor 300 cd/m2 700:1(DC 3000:1) I dont know if you need anything else, but if you do let me know. One more thing i should point out is that i haven't done any overclocking yet. Every single part on my pc was install with stock settings. Thanks in advance... Link to comment Share on other sites More sharing options...
Dazz Posted October 16, 2007 Share Posted October 16, 2007 I looked into this when i had the problem there are some chipsets that work at full speed with all slots populated and that seems to be the P35 and the X38 boards by Intel All other boards can't handle the full speed. So i am once again disappointed in the nVidia 680i again! Link to comment Share on other sites More sharing options...
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