Jakman Posted October 26, 2006 Share Posted October 26, 2006 Hello, I am doing a new build and have a ASUS P5W DH DELUXE/WIFI-AP and am planning on putting CORSAIR XMS2 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit with it, using a Intel Core 2 Duo E6600 Processor. The question I have is this the correct memory selection to run at 800Mhz, dual channel? I want a stable system, if this isn't the correct memory please suggest the correct one. will this MoBo let me set the memory settings to 2.1v? Thanks in advance for your help. Jakman Link to comment Share on other sites More sharing options...
MrDisco Posted October 26, 2006 Share Posted October 26, 2006 I too have the same question as the op. I have purchased the P5W DH + e6600 and am stuck on which memory module to buy. My goals are: -Stability -Plug 'n play operation -Stability Will the TwinX C4 2gb module kit fill the above role? Will have to alter any BIOS settings to get the most out the modules? Is this board capable of 2.1v? Sorry lotta newbie questions but I'm really clueless on what RAM to buy. Please help :) Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 28, 2006 Corsair Employees Share Posted October 28, 2006 NO all of our XMS modules will need to be manually set in the bios for proper operation. If you just want to plug and play I would suggest VS2GBKit667D2! Link to comment Share on other sites More sharing options...
MrDisco Posted October 31, 2006 Share Posted October 31, 2006 NO all of our XMS modules will need to be manually set in the bios for proper operation. If you just want to plug and play I would suggest VS2GBKit667D2! Hello. Thank you for your response. Perhaps you could answer the following: -If I plug the XMS c4 modules in, will I still be able to boot up and get into the BIOS? I dont have any other DDR2 modules handy so if I can't do this step this kit may not work for me -Where can I find detailed instructions on what values I need to change in the BIOS to get this to work? -Finally, will this work in the P5W DH (specifically can the board deliver the 2.1v needed?) Thank you again for your help. I am very confused. :confused: Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 1, 2006 Corsair Employees Share Posted November 1, 2006 Yes they should work with this MB just reset the bios before you install the modules! Link to comment Share on other sites More sharing options...
matibaer Posted November 1, 2006 Share Posted November 1, 2006 First I´ve had set all BIOS-options to AUTO. The MB decided to use this RAM with 667 MHz. The latency was set to 5-5-5-18 Then I´ve manually set the frequency to 800 MHz. After that ASUS decided to set the lat-param. to 5-5-5-2 Fasten I´ve changed these settings to 5-5-5-15 Now I´ve read something on corsairmemory.com about 2T So I must ask you : What are the detailed right parameters - please fill in : DRAM CAS# Latency : DRAM RAS# Precharge : DRAM RAS# to CAS# : DRAM RAS# Activate to Precharge Delay : DRAM Write Recovery Time : And additionally - does exist other better manually set parameters ? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 1, 2006 Corsair Employees Share Posted November 1, 2006 Please follow the link in my signature for the tested settings! Link to comment Share on other sites More sharing options...
matibaer Posted November 2, 2006 Share Posted November 2, 2006 OK, it must be this : Testing parameters for Twinx/XMS2-6400: Twin2x1024A-6400 Data Sheet Twin2x2048-6400 Data Sheet Motherboard make and model: Asus P5WD2 Premium/Deluxe Each pair is tested and packaged together using the following settings: AI Over Clock Tuner: Manual CPU External Frequency: Manually set to 200MHz DDR2 SDRAM Clock: Manually set to 800MHz PCI Express Freq: Auto PCI Freq: 33.33 Performance Mode: Standard DRAM Timing Selectable: Manual SDRAM CAS Latency: 5T SDRAM RAS to CAS Delay (tRCD): 5T SDRAM Row Precharge (tRP): 5T SDRAM Active to Precharge Delay (tRAS): 15T SDRAM Write Recovery Time: 5 Command Rate: 2T DDR2 SDRAM Voltage: 1.9 Chipset Core Voltage: Auto All other settings are motherboard defaults. Maximum DDR2 recommended VDIMM: 2.1 Volts WHAT IS "Command Rate: 2T" ? Why the SPD-automatic by P5W.. set tRAS to 2T instead of 15T ? Link to comment Share on other sites More sharing options...
matibaer Posted November 2, 2006 Share Posted November 2, 2006 One more question, please : I´ve bought that kit two weeks ago. Now it is not enough for me (2*512MB). I want to buy the same kit again to have 2GB. The dealer where I have bought these modules cannot take them back, but he informed me that I only can use "single rank modules" if I would put 4 modules into the board. What is "single rank". Can I use 4 of these modules (2 kits) ? Is "TWIN2X1024A-6400" a kit of single-rank-modules or double-rank-modules ? ------ I think I have found the right info, that the kit has two CM2X512A-6400-Modules, which should be single-rank-modules, right ? So I can put additionally ram-modules. Which 2GB-Kit could I add to the 1GB-Kit. The Twin2x2048-6400-kit is definitly a double-rank-module-kit. I must have a single-rank-module-kit ! Link to comment Share on other sites More sharing options...
MrDisco Posted November 2, 2006 Share Posted November 2, 2006 the P5WD2 is a workstation board. will it use the same values as a P5WDH? man this is really frustrating. isn't there a dummies guide on how to properly configure ram? :confused: Link to comment Share on other sites More sharing options...
matibaer Posted November 3, 2006 Share Posted November 3, 2006 Do nobody know the answers ? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 3, 2006 Corsair Employees Share Posted November 3, 2006 Is "TWIN2X1024A-6400" a kit of single-rank-modules or double-rank-modules ? Yes the "A" in the part# means it's single sided! And the settings have been posted once in this thread do you have questions about these settings? Link to comment Share on other sites More sharing options...
matibaer Posted November 4, 2006 Share Posted November 4, 2006 single-sided is not the same as single-rank. But it is true, it´s a single-rank. I´ve found no single-rank 1024-module !!!! single-rank-2048mb-kit ?????? can I put four of my modules on my board ?????? Link to comment Share on other sites More sharing options...
Wired Posted November 4, 2006 Share Posted November 4, 2006 Single sided 1 Gb modules are prohibitively expensive and as such are hard to find, because no one wants to pay THAT much for memory. Link to comment Share on other sites More sharing options...
matibaer Posted November 4, 2006 Share Posted November 4, 2006 Ok, I will ask you in another way ?! ASUS P5W DH DELUXE 4 RAM SOCKETS ---------- ---------- ---------- ---------- Now configurated : CM2X512A-6400 (Kit TWIN2X1024-6400) ---------------- CM2X512A-6400 ---------------- WORKS ! CM2X512A-6400 (Kit TWIN2X1024-6400) CM2X1024-6400 (Kit TWIN2X2048-6400) CM2X512A-6400 CM2X1024-6400 WILL THAT WORK ??? CM2X1024-6400 (Kit TWIN2X2024-6400) CM2X1024-6400 CM2X1024-6400 CM2X1024-6400 WILL THAT WORK ??? CM2X512A-6400 (Kit TWIN2X1024-6400) CM2X512A-6400 CM2X512A-6400 CM2X512A-6400 WILL THAT WORK ??? CM2X1024-6400 (Kit TWIN2X2048-6400) ---------------- CM2X1024-6400 ---------------- WILL THAT WORK ??? And one time again. I did not ask for single-sided-RAMs, I had asked for single-rank-modules. These are two different things ! It gives single-rank, dual-rank and quad-rank -modules. It can be necessary to use single-rank-modules to be able to use all RAM-sockets. Of course a single-rank-module can be a double-sided module. Of course a dual-rank-module can be a single-sided module. Link to comment Share on other sites More sharing options...
matibaer Posted November 6, 2006 Share Posted November 6, 2006 ? ?? ??? Link to comment Share on other sites More sharing options...
matibaer Posted November 6, 2006 Share Posted November 6, 2006 Ok, nobody could gave the answers so I had simply to try it out (not all). I can wildly combine CM2X512A-6400 and CM2X1024-6400. Both Kits togehter are working fine, in DC-Mode, too ! CH1 "1024+512" + CH2 "1024+512". The TWIN2X1024-Kit alone is faster than the TWIN2X2048-Kit alone. Together they are as fast as the TWIN2X1024-Kit. How can this be ? It should be as slow as the slowest but it isn´t. True but not sad ;-) Why the 2048-Kit is slower than the (same type) 1024-Kit ? To present a value : read/write is about 100 MB/s slower. I´ve chosen 5-5-5-15 for the big kit like for the small kit before. On the chips itself "5-5-5-12" is written. May I try this ? Link to comment Share on other sites More sharing options...
matibaer Posted November 6, 2006 Share Posted November 6, 2006 Exacter analysis of the 2048-kit (TWIN2X2048-6400 = Dual Rank): Read : 6986 MB/s Write : >4800 MB/s Copy : <4600 MB/s Before - The 1024-kit (TWIN2X1024-6400 = Single Rank) : Read : 7157 MB/s Write : >4900 MB/s Copy : >4900 MB/s Why ? Link to comment Share on other sites More sharing options...
matibaer Posted November 8, 2006 Share Posted November 8, 2006 Why the copy-throughput is about 500 MB/s slower with the 2GB-Kit than with 1GB-Kit ? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 9, 2006 Corsair Employees Share Posted November 9, 2006 All modules that have and "A" in the part# would be single rank/bank. And all 1.0 Gig modules right now would be double rank/bank. Link to comment Share on other sites More sharing options...
matibaer Posted November 10, 2006 Share Posted November 10, 2006 And double-rank is the reason for a slower throughput ? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 11, 2006 Corsair Employees Share Posted November 11, 2006 No more loading on the memory controller is the reason! Link to comment Share on other sites More sharing options...
matibaer Posted November 11, 2006 Share Posted November 11, 2006 I don´t understand this. "memory controller". "no more loading". Does this simply mean : The more RAM (MB or GB) you have the slower the controller will be for the tasks read/write/copy ? Then answer me that : If I put the faster single-rank-modules additionally to the slower double-rank-modules the speed becomes higher. 1 GB SR - Fast 2 GB DR - Slow 3 GB SR+DR - Fast ??? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 14, 2006 Corsair Employees Share Posted November 14, 2006 Please watch the memory basics presentation as it will answer most of these questions if not all! Link to comment Share on other sites More sharing options...
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