Jump to content
Corsair Community

CMX512-4000 problems with dividers on ASUS P4C800-E


phil stanbridge

Recommended Posts

Hi, I've got two sticks of this twinx ram, XMS4000v1.1. It runs perfectly at 1:1, at around 530mhz. However, it will NOT run at 3:2 or 5:4 at all. It refuses to even post. I have tried it in two different motherboards and I get the same problem. Any ideas what is causing this? Regards Phil
Link to comment
Share on other sites

Hi phil and welcome to the forum. When you are trying to boot using the 5:4, what FSB are you setting? Also, what MOBO+CPU are you using. What is your Vcore and Vdimm? Please post up complete system spex along with your bios settings. FYI, from what I have been reading on other forums, it seems that most if not all brands of PC4000 using Hynix ICs does not like to run dividers at a high FSB. Just curious, why are you trying to run a divider with DDR500 RAM? Good luck, Mike.
Link to comment
Share on other sites

Thanks for the reply - I'm running a 2.4C @ 320FSB hence the requirement for 5:4. Asus P4C800-E deluxe (latest final bios) Malay L322 2.4C Vcore is 1.65 (actual) VDimm is 2.85 That said, it will not post even at stock settings @ 5:4 OR 3:2. Only 1:1, so there is definitely something wrong. I have tried this motherboard with my other 3700 memory and it's fine at every divider, so it would appear to be memory related.
Link to comment
Share on other sites

[QUOTE][i]Originally posted by phil stanbridge [/i] [B]Thanks for the reply - I'm running a 2.4C @ 320FSB hence the requirement for 5:4. [/B][/QUOTE] :praise: WOW! Nice FSB!:praise: I kinda figured that you had a HIGH FSB if you were trying to run a 5:4 with PC4000. You may want to search some and see if others are having the 5:4+PC4000 limitation you are. That may or may not be your problem. Your RAM runs at about the same FSB as mine at 1:1. I have never tried 5:4 but I may later if that machine is available to me. I prefer synchronous operation for DV editing but if I can get the wife off the machine long enough I'll test mine and let you know. She's making money though, so I may not have any luck getting the box. Good luck, Mike.
Link to comment
Share on other sites

Thanks for the comments Mike. Obviously I don't run my machine like that all the time - it's purely for benchmarking - normally I run at around 250FSB (3ghz) 1:1, as I prefer synchronous also. Surely the ram *should* work at 5:4 or 3:2 @ stock though? It doesn't post as soon as I change the divider, no matter what the other settings are. I can understand it not working at high fsb, but this is at stock.
Link to comment
Share on other sites

  • 3 months later...
same problem here... ASUS P4C800-E Dlx, p4 2.4c @ 3.5 ~292fsb 5:4 2x CMX512-4000PRO sticks (1gb) 2.85vdimm WILL NOT POST @5:4 which should be 466mhz which is UNDERclocking the ram so no reason it shouldn't post timings are std 3-4-4-8 at 1:1 she runs fine but maxes out @267fsb (534mhz) Same EXACT config but swap the Corsair's for some BH5 pc3500 and it posts + boots + runs like a champ (but tops out at 281fsb) WHAT GIVES?:eyebuldge
Link to comment
Share on other sites

  • 2 weeks later...
[quote name='LuckMan212'] so no reason it shouldn't post Same EXACT config but swap the Corsair's for some BH5 pc3500 and it posts + boots + runs like a champ (but tops out at 281fsb) WHAT GIVES?:eyebuldge[/QUOTE] At a glance it does not make any sense but as I noted above many users with RAM using Hynix ICs have reported the same problems. It appears that it may be either bios related and/or simply the ICs. The legendary Winbond BH-5s in the PC3500 could be the difference. And, the PC4000 was not designed for or tested for asynch operation. Mike.
Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...