8500C5 @ 1066 or 800

I've L@@ked but haven't found my answer yet so here it goes. I just put together a Gigabyte GA-EP35-DS3P with a E8400 & Twin 2X2048 8500C5 modules. My question is now that I've been reading threads is it better to be at a 1:1 ratio @ 800 & OC to 9x400=3.6 or try to get these modules to 1066. If it more desirable to be @ 800 and a 1:1 ratio can I adjust the timing to CL4 or just leave at CL5 5-5-5-15 2T. I've added a Zalman 9700 hsf and oc'ed to 9x400 with no problem @32c

 

thanks for any help! :confused:

I've L@@ked but haven't found my answer yet so here it goes. I just put together a Gigabyte GA-EP35-DS3P with a E8400 & Twin 2X2048 8500C5 modules. My question is now that I've been reading threads is it better to be at a 1:1 ratio @ 800 & OC to 9x400=3.6 or try to get these modules to 1066. If it more desirable to be @ 800 and a 1:1 ratio can I adjust the timing to CL4 or just leave at CL5 5-5-5-15 2T. I've added a Zalman 9700 hsf and oc'ed to 9x400 with no problem @32c

 

thanks for any help! :confused:

 

You can test this out. Download Memtest from http://www.memtest.org and burn the ISO image to a CD. Set your system to 400 and 1066 with 5-5-5-15 2T @ 2.1v. Run memtest and look at your Memory Designation (Below the L2 Cache). Test the bandwidth against the 400 and 800 with 4-4-4-12 @ 2.1v. Then try 4-4-4-10 for two full passes. If 4-4-4-10 passes, then that is what I personally like with 8500C5's and 2GB sticks.

Thanks I'll try it

Well this is what I have with one off and on problem. The E8400 is overclocked on my gigabyte GA-EP35-DS3P with no voltage change from 333X9= 3.0 to 400X9= 3.6 the memory is 8500C run @ 800 with the timing set @ 4-4-4-12 2T Voltage is @2.1 the ratio is 1:1 I ran memtest for 4 hours with no errors but this is where it gets weird. When I was rebooting I would get a beep error 1 long with two short which is a monitor or graphics card error. If I then hit the reset button 1-2 times it would boot normal. then I ran Sandra and the memory read like this. Manufacture date December 1999 1.8v PC2-6400 v1.2 5-5-5-18. So what exactly did I buy? DDR2 800 CL4 which can be overclocked to DDR 1066 @5-5-5-18 @1.8v Anybody got the answer because I thought I bought 8500C

That is the JEDEC SPD (Serial Presence Detect) for the DRAM. The DRAM needs to have the standard speed and timings for the system to recognize it. The extended frequencies and timings of 1066 and 5-5-5-15 are manually entered in the system. You have purchased high end memory that exceeds the standards set in the JEDEC. JEDEC standards are no higher than 800MHz and 5-5-5-18 with 1.8v. Anything higher is beyond their standards.

 

http://img293.imageshack.us/img293/9144/cpuzei9.png

 

Note the SPD settings. Note that it give 6400 at the Maximal JEDEC standards but that the part number shows that indeed this is 8500C5's. Note that the timings show the JEDEC standards. Then you insert the settings 800Mhz --> 1066Mhz and 5-5-5-18 to 5-5-5-15. Or set to 800Mhz with 4-4-4-12.