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different ver. Twin2x2048-6400C4

post #1 of 13
Thread Starter 
okay so i was dusting out my computer and also resetting cmos after a failed try to hit 3.0ghz on x2 4600+...well anyways i was curious to my memory versions were to different ones...so i wrote down what the stickers said on each of them went to check out the ic's on them on houseofhelp.com the corsair support forums and found out that i had two different 2gb kits with different versions!!!

now one set is:

XMS640X v1.X...MICRON.........64Mx8...Rev.D

and the other set is:
XMS640X v2.X...PROMOS........64MX8...90nm

now i have not been able to get a really stable over clock could this be the problem?????

they both passed the memtest86+ version 2.01 with flying colors on every setting i have done with them...i have done everything from just doing 2 cycles and quit to running them all day and get 18 cycles of passes but when i overclock my pc i still keep running into problems and i think this could be a problem...

i know micron is good but i heard promos suxs...but since corsair matches these pairs they should be okay no matter the ic's right???

also for those out there that have 2 sets of these 2gb kits can someone tell me what kind of timings i should be trying for??? i really would like tight timing and low divides because i am trying for 3.0ghz and i know i will be wanting to master the 1T command so anybody got any ideas for timing???

Edit: forgot to write down the stickers said:

THIS IS THE SECOND PAIR BOUGHT YEAR LATER:

CM2X1024-6400C4 4-4-4-12
XMS6404 V2.1 800MHZ
1024MB
XMS2-6400

THIS WAS THE FIRST PAIR I BOUGHT:

CM2X1024-6404C4 4-4-4-12
XMS6404 V1.2 800MHZ
1024MB
XMS2-6400
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post #2 of 13
Yes that's definitely an issue. My old revision 1.2 hit 1100MHz without touching the voltage, I doubt your Promos can do that. They both probably like different voltages which is also going to give you issues, but I'm pretty sure Promos are less sensitive to voltage (someone correct me if I'm wrong). Do you really need 4GB right now? I'd keep the Microns in and save the Promos as backup or for another rig.

As for the Microns, my rev 1.2 ran at 2.1v 4-4-4-12-23-2T up to about 950MHz, and 5-5-5-15-23-2T up to 1120MHz and probably higher. I had no way of pushing them further since my CPU hit a wall at the 10x multiplier (the most aggressive multiplier for memory), but I wouldn't be surprised if they had more headroom. Unfortunately my PSU failed last week and took my rev 1.2 with it
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post #3 of 13
If your running dual channel it may cause more stability issues since they are by no
means a "matched" set
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post #4 of 13
Thread Starter 


well if you take a look at this from my validation i got all 4stick population doing around 450mhzx2 = 900mhz @2.1volts 4-4-4-12 2t 22

but i think i might want to take your advice and take out the v2.1 memory...

now if i say i wanted to upgrade to 2x2gb ddr2 dominators 8500 would that be okay and use the other 6400 sticks in a different rig???
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post #5 of 13
Hmm, none of the 2x2GB sticks use the same Micron D9 chips as the many overclocking beasts in the 2x1GB area. I'm willing to bet the Corsair Dominators aren't all that great. I think the 2x2GB G.Skill PC2 8000 is the best value right now, if you want a 2x2GB set those are probably your best bet. Try loosening the timings on your 4x1GB set though, see what you can get with 5-5-5-15-24-2T.
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post #6 of 13
Thread Starter 
okay well it is better but still really slow...is it because my divide is 533???
you think that i should try for 1000mhz with this 4gb set up
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post #7 of 13
You're running 900MHz effective and 4-4-4-12 and it feels slow? That's not the memory then, either your CPU is bottlenecking, or you have waaaay too many processes running in Windows.

The memory setting (i.e. DDR2 533) isn't very important, its the speed and timings of the memory that matters. The memory setting is just one of the factors that influence the memory speed.
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post #8 of 13
Thread Starter 
i have my ht @ 260x3 = 780mhz i think this is the bottle neck you are talking about....you think i should try for 260x4 = 1040mhz??
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post #9 of 13
YEAH that will impact the system alot !! use your 4X multi on HT and youll be @ 2080 HT
which is ok its still within 100 mhz of stock 2000
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post #10 of 13
Well, I agree that you should try for a 4x HT multiplier since I'm confident you can run a 4x multi, but I disagree that it's the cause of your computer slowdown. The HT Link is vastly underutilized and the only data that flows on it are your input/output devices and some texture operations from the PCI-E. I had to run my HT Link at 810MHz on my Biostar board (3x HT multiplier) with a reference clock of 270MHz, because a 4x HT multiplier wouldn't post. I saw absolutely no loss in performance and neither will you.

Please post a CPU-Z screen shot showing us the "CPU" and "Memory" tabs. This will help us determine if your slowdown is a result of hardware settings or Windows.
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White Whale
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