Quote Originally Posted by ZilverPhish View Post
Some questions> I have a problem with booting on my mobo since it tends to revert to default voltage *1.8 or such, on my "old" Micron domis 8500 c5d. As I understand Quimonda runs at lower voltage, so maybe they could boot easier than the Microns`?, Or do I still have to keep a booting crap pair of ram around?

Are there any known problems with "mixing" these two types of ICs in the same system 2*1024 8500 c5d ver 1.x and 2*1024 8500 c5d ver 2.2? Compatibility wise as well as performace wise, without factoring in the generally known overclocking "drawbacks" in regards to 4 gig system memory setups.
Quote Originally Posted by ChaosMinionX View Post
The newer revision have ICs similar to what you would call "crap pair of ram" in terms of voltage requirements so even if the BIOS kicked back to 1.8v those sticks would still boot at the timings BIOS defaults back on.

And you should have no problems mixing the 2 different revisions of the 8500C5D the only differences you will see between the 2 revisions now is their "theoretical" overclockability, they still might overclock well, but Micron is tried and true when it comes to overclocking and how well the IC's respond to voltage increases, and how well they handle lower timings and higher speeds and whatnot
I'm not sure they are compatible. Not Yet

I have both version mixed for the first time.

TEST BED

EVGA 680i A1 mobo P31 bios|Q6600|8800 GTS 640 sli|OCZ700GXS
CM2X1024-8500C5D 2-2GB kits v1.2 & v2.2


no OS yet booting to iso UBCD v4.1.1 http://www.ultimatebootcd.com/index.html

using Memtest86+ & Mersenne Prime Test to establish stability.

I was able to run both pairs individually dual channel mode 2GB config
@ 400x9 Link/sync 1600 A. FSB, SLI-Ready Mem.=Disabled
all spread spectrum & CPU features Disabled
Auto volts except vdim man set @ 2.15v
Mem. time= man set Expert 4-4-4-15-1T all else auto

Both pairs passed 6 hrs. prime stable & 6 hrs zero errors memtset

Now I did not expect that they would run together @ 1T in a 4GB config
but I did hope for 2T 4GB config at the low latencies.

NO JOY

Now I'm not saying this is a flaw I'm hoping I've made a minnor miss calulation
and someone can help me find the love.

Qusetions:
1) Am I wrong to go the low latency route or would you recommend higher FSB for best performance?
2) Is this an unrealistic expectation to pair these two revisions in the same bed @ low latencies or otherwise?
3) What volt would best suit this pairing?
4) What man sets to use? or all auto see where it goes....
mmmmmm I'm gonna try that but I digress
5) I've noticed the PCB HS seems to be somewhat different in that
it appear to be a different color or possibly grade. Could this account for the better thermal performance.

Please Advise!