Corsair Twin2X2048 6400C3

[Ross]

I got a pair of these bad boys today and will be putting them through the full paces, hopefully starting tonight!

2GB DDR2-800 3-4-3-9 @ 2.2V default specs.

http://i10.photobucket.com/albums/a125/boostedevo/6400c3/twin2x2048-6300c3-2.jpg

http://i10.photobucket.com/albums/a125/boostedevo/6400c3/twin2x2048-6300c3-3.jpg

[Ross]

This stuff has got to be one of the next big things! :D I didn't have a bunch of time to mess around with it tonight, so I just tested out some default 2.2Vddr. Keep in mind, this is *2GB*.

http://i10.photobucket.com/albums/a125/boostedevo/6400c3/ddr864-3334-223v.gif

http://i10.photobucket.com/albums/a125/boostedevo/6400c3/ddr900-3430-223v.gif

http://i10.photobucket.com/albums/a125/boostedevo/6400c3/ddr1080-4444-223v.gif

All speeds/timings above are totally bench stable...I can't wait to see what higher Vddr gives :D

[El<(')>Maxi]

That 540 is also on 2.2v? One things for sure, this particular Corsair memory is going to be very hard to ignore if you have to have the best performance. I think I'll try a set myself ;)

[Ross]

All of the above are @ 2.2V...and my system has never been so stable, LOL. Seriously, it's benching 225MHz higher (!) than it did in the dead of winter and even higher than I've benched it on DI :confused: Whatever it is, I'll take it! I guess it might be time to give that 6GHz 100% OC thing another shot...maybe it will make it now :D

I'd definitely recommend getting a pair ;) I went back to "work" after I checked those clocks/timings, but I'll set aside a couple of hours tomorrow to do some benches.

[proth]

Looks like these 6400s @ stock voltage has better performance than the 8000ul running @ 2.7v...and they are 2GB sticks. Really great stuff which should also be killers on AM2 and Conroe...

[Ross]

No doubt. Almost the same speeds/timings at a whole lot less voltage...and with twice the capacity. I am really wondering if the sticks/low Vddr is what is giving me the extra stability in the board to run the higher CPU clocks? Talk about an awesome bonus :D These seem a bit warmer @ 2.2V than the ULs even with all the Vddr, but I haven't stuck a temp probe in them yet. One thing is for sure, the spreaders are doing their job...well ;)

[crimedog]

since 2.2v is pretty high for a stock vddr2 i'd be curious how they respond to voltage. nice ram ross, but i think i'll be sticking with 4x512 of fatbodies ;)

[Gautam]

You lucky bastid.

This set has been on my shopping list for a while as well...I don't think I'm going to be able resist much longer. :(

Can you try 4-3-3-x with maxed out volts? IMHO this is the most relevant timing/speed bracket for Conroe.

[Ross]

@crime: yeah, having some fatbodies laying around is a given :D It sure seems like this newer stuff is definitely in the ballpark though with more capacity and a lot less volts. 2.2V is a bit on the high side for default (SPD programmed for 5-5-5-5-15 @ 1.8V "just in case"), but that pales in comparison to 2.5-2.7V for similar speeds/timings on fatbodies ;) Actually, neither pairs of my fatbodies do CAS3 over ~DDR2-800 no matter how much Vddr I tossed at them and I'm looking at DDR2-900 CAS3 on these guys already :)

@Gautam: I am going to let them burn in all day today. I never really believed in that, but my XP6400s were a lot slower when I first got them (would barely hit DDR1100 @ CAS5) and by the time I sold them, they were DDR1100 @ CAS4. proth had a similar result on his 8500s.

4-3-3 is one latency config I haven't tried yet, but tRCD seems to be a bit more of a factor on these and they don't seem to like running quite as tight as fatbodies, but again, they're brand new and I haven't jacked up the voltage on them yet. Personally, I'd like to see if they'd do something a hair closer to DDR2-1000 keeping CAS3, but that's probably a REAL tall order :D I will also have to check some benches. My fatbodies were a tad weird in that 4-3-2-4 was obviously best for access latencies (Pi), but 4-3-3-4 was actually a good bit more bandwidth.

I'll keep ya posted on it...

[RedDragonXXX]

Very Nice!!!

Anyone know what IC's are these running on?

[Gautam]

There's gotta be a set of 6400C3 out there that can pull 1000 CL3...maybe you got the one? :D

[Ross]

RedDragon: Micron D9-based, but I do not know the exact IC model number and the spreaders are held on with thermal epoxy so there will be no pulling them to find out ;)

Gautam: I'll keep my fingers crossed ;)

[RedDragonXXX]

That's good enough, thanx :)

[Ross]

There's gotta be a set of 6400C3 out there that can pull 1000 CL3...maybe you got the one?It's a possibility :D

http://www.ocforums.com/showthread.php?p=4539135#post4539135