65Cobra Posted January 13, 2007 Share Posted January 13, 2007 In the past 2 weeks I've spent more hours than I care to admit deciding on a new system. At this point I'm leaning towards the Asus P5B Deluxe Motherboard and the Intel Core 2 Duo E6600 Processor, but I never thought buying Ram would ever become this difficult. I just spent the last 2-3 hours on this forum alone. Although there are multiple memory modules to choose from, I'm looking to buy two 1GB 240-Pin DDR2 800 modules for this setup. I have no intention of overclocking my system as stability is my #1 priority, but since this motherboard has a lot of potential for future CPU upgrades, especially if it does end up working with the Quad Core processors, I would like to buy the right memory now so it will still work in this motherboard as I upgrade the CPU. Any advice would be greatly appreciated. Thanks. Link to comment Share on other sites More sharing options...
DerekT Posted January 13, 2007 Share Posted January 13, 2007 I personally would go with the 6400C4's. They will give you 4-4-4-12 at 800Mhz and are very good latencies at 800Mhz. You can move up the ladder if you want even tighter latencies or more bandwidth though, but the 6400C4's are fine sticks. Link to comment Share on other sites More sharing options...
SylvainFrenchie Posted January 13, 2007 Share Posted January 13, 2007 Hi... I've buy an asus P5B deluxe with E6600 and i've choice memory CM2X1024-6400PRO. Is it good ??? I want to upgrade to 2048 with the same memory : is it Ok ?? I don't want to o/c but i'm not sure that my bios is ok with this memory : could you tell me if there's something to do in the bios. Thanks for your answer and excuse me for my bad english. Link to comment Share on other sites More sharing options...
65Cobra Posted January 13, 2007 Author Share Posted January 13, 2007 Thanks for your response DerekT. Here is where I try to put things together. The Corsair compatability list for the P5B Deluxe motherboard lists one 6400 C4 module, the TWIN2XP2048-6400C4 ($409 at NewEgg), and one C4D module, the TWIN2X2048-6400C4D Dominator ($305 at NewEgg). Both appear to be the same in terms of Capcity (2x1GB), CAS Latency (4) and Timing (4-4-4-12). The price difference is pretty big and I'm not sure why, especially when the C4D is cheaper, yet NewEgg lists them as SLI Certified, but not the C4. Otherwise I saw the C4D are 2.1v when the C4 are only 2.0v. Then, in my notes, I show the TWIN2X2048-6400C4 which are even less ($276 at NewEgg) and the specs are exactly the same as the C4D. I think it was on this forum that someone had problems with another brand, changed to these and they worked perfectly after an extensive memory test. My only hesitation here is they aren't listed on the Corsair Compatibility list for my motherboard. I realize you get what you pay for and obviously one can't trust the specs as listed on NewEgg, so there has to be more of a difference between these modules. Again, my priorities are (1) reliability and (2) being able to upgrade the CPU without having to replace the ram. If all these modules will be just as reliable and will work fine with future CPU upgrades, then why spend $409 when I can spend $305. If the difference solely has to do with minor speed variences between them, well, that's not critical in my book. If it was I'd be an overclocker. Besides, this system will kick my current systems butt (Athlon XP 3000) no matter what. Thanks. Link to comment Share on other sites More sharing options...
Yellowbeard Posted January 13, 2007 Share Posted January 13, 2007 The TWINXP part is the Xpert memory. See the Xpert section for specifications. In a nutshell, the Xpert is bling, which is cool, but does not fit your listed hierarchy of needs. Also, with the exception of the voltage handling and the heatsinks (see Dominator for C4D specifications) the PC6400s you listed are the same memory underneath. Based on your post, I'd decide between the PC6400C4 and PC6400C4D. Price is a good deciding factor if you will not be doing any extreme OCiing. Link to comment Share on other sites More sharing options...
speedlever Posted January 14, 2007 Share Posted January 14, 2007 This helps answer some questiions I had too. In my case, it's a P5B-E mobo which the configurator does not show. (Shows P5B-E plus, but not a plain P5B-E). Maybe it's the same. How much extra heat is generated when OCing? Since the Jedec spec (as I understand it) is 1.8v and the voltage spec on the PC2-6400C4 and C4D is 2.1v to make the advertised timings, will heat be an issue if I push the voltage up from the base spec? Also, will the C4/C4D post normally with everything set to stock? Will the heat spreaders on the Dominator series cause clearance issues with large HSF (Noctua NH-U12F, Scythe Ninja, etc.)? How about with passively cooled GPUs? (Gigabyte 7600GT SP II) 65cobra... I've done the same as you... spent way toooo much time researching a new Conroe build. In my case, P5B-E/e6600. I never knew the RAM issue would be so consuming... but that is largely due to my ignorance on the subject. Link to comment Share on other sites More sharing options...
boonmar Posted January 15, 2007 Share Posted January 15, 2007 The TWINXP part is the Xpert memory. See the Xpert section for specifications. In a nutshell, the Xpert is bling, which is cool, but does not fit your listed hierarchy of needs. Also, with the exception of the voltage handling and the heatsinks (see Dominator for C4D specifications) the PC6400s you listed are the same memory underneath. Based on your post, I'd decide between the PC6400C4 and PC6400C4D. Price is a good deciding factor if you will not be doing any extreme OCiing. specmike, I've seen a lot of your replies so you must really know a lot about memory. I'm on the same boat with the original poster. I'm looking at Asus P5B deluxe, E6600 cpu, and Corsair Twin2x2048-6400C4 memory. I've read that few people are having issue with the Asus motherboard will not post due to the default memory voltage on the motherboard. The work around is to use older memory so the machine will post, then change the voltage setting. I don't know how common this problem is but this is what is holding me back from getting this system. Do you know any issue with P5B Deluxe and Twin2x2048-6400C4 issue? Link to comment Share on other sites More sharing options...
speedlever Posted January 15, 2007 Share Posted January 15, 2007 boonmar, I sure hope that voltage is not an issue with the P5B-E. I don't have the board yet, but sorta doubt my old PC2700 RAM will work in the P5B-E board. I just ordered the PC2-6400C4 RAM last night along with the rest of the gear for my new rig. Link to comment Share on other sites More sharing options...
boonmar Posted January 15, 2007 Share Posted January 15, 2007 boonmar, I sure hope that voltage is not an issue with the P5B-E. I don't have the board yet, but sorta doubt my old PC2700 RAM will work in the P5B-E board. I just ordered the PC2-6400C4 RAM last night along with the rest of the gear for my new rig. Well, too late to turn back. Just pull the tricker. There is a $40 mail in rebate from zipzoomfly.com and today is the last day. So, I hope I made the right decision. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 17, 2007 Corsair Employees Share Posted January 17, 2007 98% of the people who have our memory never have a problem and most of the people who I have seen who have had this issue either had a old bios that would not support the core of CPU they had which may not post properly till the Bios was updated, or they had a failing module are the two most comon reasons for the system not posting. Or in some cases they had another issue or failing componant like the MB PSU or bad CPU. Just because its the same sympton its not always the same solution. By the way we are selling more than 10,000 sets of this part alone a week, so the number of peole having problems is quite low compared to the volume we sell. Link to comment Share on other sites More sharing options...
sandplasma Posted February 2, 2007 Share Posted February 2, 2007 specmike, I've seen a lot of your replies so you must really know a lot about memory. I'm on the same boat with the original poster. I'm looking at Asus P5B deluxe, E6600 cpu, and Corsair Twin2x2048-6400C4 memory. I've read that few people are having issue with the Asus motherboard will not post due to the default memory voltage on the motherboard. The work around is to use older memory so the machine will post, then change the voltage setting. I don't know how common this problem is but this is what is holding me back from getting this system. Do you know any issue with P5B Deluxe and Twin2x2048-6400C4 issue? hey boonmar, I just finished my system two days ago and it's running superbly. I'm using... Asus P5B Deluxe MOBO Intel Core2Duo 2.4 E6600 Corsair 6400C4s. You do not have to use older ram to set the voltage. The C4s will automatically work for the motherboard but will be clocked lower than 800MHZ. You just fix this in the BIOS manually after you POST. Easy as pie. Good Luck! Link to comment Share on other sites More sharing options...
65Cobra Posted February 2, 2007 Author Share Posted February 2, 2007 sandplasma, you're using the same motherboard, cpu, video card and ram than I'm using (although I'm using 6400C4D), yet now I'm having problems getting memtest to run successfully with both memory modules installed. I started another thread here... http://www.houseofhelp.com/forums/showthread.php?t=57381 I realize this is asking a lot but I'd sure like to know the settings in your BIOS for... Advanced\Jumper Free Configuration, Advanced\CPU Configuration, and Advanced\Chipset\North Bridge Configuration Thanks. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted February 2, 2007 Corsair Employees Share Posted February 2, 2007 Make sure that you have the latest bios version and that you are running a 1066 FSB CPU and thehn set these settings after you load setup defaults. AI Over Clock Tuner: Manual CPU External Frequency: Manually set to 266MHz DDR2 SDRAM Clock: Manually set to 800MHz PCI Express Freq: Auto Performance Mode: Standard Dim/DDR Voltage: 1.9 Volts DRAM Timing Selectable: Manual SDRAM CAS Latency: 4T SDRAM RAS to CAS Delay (tRCD): 4T SDRAM Row Precharge (tRP): 4T SDRAM Active to Precharge Delay (tRAS): 12T SDRAM Write Recovery Time: 5 Write to Precharge Delay: 15 (If its Listed) Legacy USB: DIsabaled Then test your system with http://www.memtest.org if you get errors please test the modules one at a time to make sure its not a failing module. Link to comment Share on other sites More sharing options...
65Cobra Posted February 2, 2007 Author Share Posted February 2, 2007 RAM GUY, the current problem is under the thread "Asus P5B Deluxe and TWIN2X2048-6400C4D More Problems" which can be found here... http://www.houseofhelp.com/forums/showthread.php?t=57381 I was actually waiting for you to respond there because it is more current and shows that I've already tried those settings and Memtest still fails. Is there someway to close this thread? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted February 3, 2007 Corsair Employees Share Posted February 3, 2007 Let's get them replaced, please use the On Line RMA Request Form and we will be happy to replace them or it. Link to comment Share on other sites More sharing options...
boonmar Posted February 3, 2007 Share Posted February 3, 2007 Like wise. And all this time, I was worried that I may run into issue of the system not posting. I didn't have any issue at all. Now I just need to find out what all those setting in the bios for the memory are. hey boonmar, I just finished my system two days ago and it's running superbly. I'm using... Asus P5B Deluxe MOBO Intel Core2Duo 2.4 E6600 Corsair 6400C4s. You do not have to use older ram to set the voltage. The C4s will automatically work for the motherboard but will be clocked lower than 800MHZ. You just fix this in the BIOS manually after you POST. Easy as pie. Good Luck! Link to comment Share on other sites More sharing options...
65Cobra Posted February 8, 2007 Author Share Posted February 8, 2007 As a final post on this subject, I replaced the original 6400C4D modules with a set of 8500C5D modules I ordered from NewEgg. I loaded the BIOS default settings then set the timing to 5-5-5-18, the "Write to Precharge Delay" at 15, and the Voltage to 2.15V (the choices were 2.15V and 2.25V). I tested them throughout last night and today, mostly with the Memory Diagnostic program from MS, and there were no errors. NewEgg agreed to let me return the 6400C4D modules for a full refund without the 15% restocking fee so they go back in the mail tomorrow. Although I'm happy I can finally move on and install Windows, I'm disappointed I had to spend more money to get what I should have had with the 6400C4D modules. Still I appreciate all the help I received on this forum so thank you all. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted February 9, 2007 Corsair Employees Share Posted February 9, 2007 I have answered you on another thread please do not double post. Link to comment Share on other sites More sharing options...
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