DDR Revisited

Big.Wayne

Big.Wayne

Big.Wayne

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twinx20483200c2pt3se9.jpg


twinx20483200c2pt1jh8.jpg


twinx20483200c2ptcpuzqw8.jpg

CORSAIR TWINX2048-3200C2PT (Rev1.2)

I am trying to find out out a bit more about this Corsair TwinX kit, according to the ramlist website it has:

Infineon BE-5 Brainpower PCB

I am not familiar with either BE-5 or Brainpower PCB (although I heard people here speak about Brainpower before).

Can any of you old-school memory experts shed a little light on this please? I am just wondering what these sticks are capable of on average?, characteristics etc?

Also what's so good about the PCB?

I am testing them right now on an Athlon64 system but it is taking a while and it would be good to have some idea of what I am working towards. The CPU-z screenie above is how I have the sticks set-up at the moment using 2.6vDimm which seems good, I don't think they can do 2-2-2-6 etc but hopefully they will overclock a bit higher than 200MHz?

Insights, tips, gibberings from Corsair Zealots appreciated! :D

Many thanks! :)
 
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I ran some of these in my 754 setup for a while

Didn't get much extra out of them tbh, something rubbish like 215mhz @ CAS2 with 2.8v

Got a bit higher using CAS3, but didn't see much point in that at all
 
You didn't just buy them off me on the bay did you as I just sold a pair? ;)

Anyway I had mine running at 3-3-3-8 at 450Mhz and could do their stock timings of 2-3-3-6 at 425. Can't remember voltage though sorry.


Corsair state voltage for 2-3-3-6 should be 2.75v so you are undervolting them by some margin which might explain why you can't get better timings.

http://www.corsairmemory.com/_datasheets/twinx2048-3200c2.pdf
 
Bought these a good 2 years ago and died last month on me 1 stick then the other. I could not get them to run at cas2 but run sweet at cas5. was able to get my x2 to around 2.7 with an atric freezer but temps got to high 60c
 
Greebo said:
you are undervolting them by some margin which might explain why you can't get better timings.
Click to expand...
Who says I can't get better timings? :D

I have stuck the sticks in an completed stock testing at 2.6vDimm which I'm pleased with, ideally would like to keep the sticks running on low power.

Just been doing some Max MHz testing at 2.6vDimm, changed to CAS 3 and 2t and cranked the FSB . . .

DDR Testbed, ASUS A8N-E, Venice 3200+
twinx20483200c2pt5a8niu2.jpg



a8n250mhz33382tkw3.jpg


a8n250mhz33382t1hs6.jpg


a8n250mhz33382t2vm2.jpg


Oooh didn't expect that! Corsair PC4000 in disguise running at 2.6vDimm, strange, even though it passed many hours of Memtest it errors out in one hour using Prime Blend or Large-FFTs, it's not the chip or the mobo because when I install actual PC4000 (OCZ/Muskin, will discuss later) the Blend test doesn't fail, think I'm safe to assume there is something with the Corsair running so fast, however I always thought Memtest picked up errors like that?

I also have no knowldge or experience with these memory settings?

Row Cycle Time (Trc)
Row refresh cyc time (Trfc)
Read-to-write time (Trwt)
Write Recovery time (Twr)

Anybody care to comment further about these IC's or PCB?

Infineon BE-5 Brainpower PCB

Thanks again! :)
 
What I meant was that at stock speed you would never get them running stable at 2-3-3-6 1T with only 2.6v through them (unless you were exceptionally lucky!)
 
Greebo said:
you would never get them running stable at 2-3-3-6 1T with only 2.6v through them
Click to expand...
Oh I see. Well as far as I can tell they are rock solid stable at that speed, in fact they are up to 217MHz 2-3-3-8 1t still using 2.6vDimm?

Hoping someone is familiar with the actual Infineon BE-5 memory chips? I'm not! :o

In the meantime I will just keep slowly testing . . .
 
Greebo said:
You didn't just buy them off me on the bay did you as I just sold a pair? ;)

Anyway I had mine running at 3-3-3-8 at 225Mhz DDR450 and could do their stock timings of 2-3-3-6 at 212.5Mhz DDR425. Can't remember voltage though sorry.


Corsair state voltage for 2-3-3-6 should be 2.75v so you are undervolting them by some margin which might explain why you can't get better timings.

http://www.corsairmemory.com/_datasheets/twinx2048-3200c2.pdf
Click to expand...


fixed :)

It's just annoying when it's stated wrongly :)
 
Hello all,

Newbie here, and it seems I'm the one that bought Greebo's Coersair memory.

Anyway, I am still playing with an old computer and constantly putting off building a better "New" rig.

I have my Corsair XMS 3200 2 gig Ram running at 2/3/2/6 200mhz with 2.5v, and have accidently got it running at 2/2/2/6 233mhz with 2.5v.

CPUcorsairat2336.jpg

Crucial.jpg
 
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this brings back memories! I remember people using BH5 with huge voltages in 2 x 256mb modules to get max clocks on A64s :)

But what I also remember is these platforms took quite a hit by going 2T which made any speed increase a bit pointless, or was I listening to the crowd too much?

Anyway, Corsair 3500LL Pro (with the lights) is where its at IMO!

Loved that ram... (cue fuzzy flashback scene)
 
Big.Wayne said:
Anybody care to comment further about these IC's or PCB?

Infineon BE-5 Brainpower PCB

Thanks again! :)
Click to expand...

Back in the day BrainPower were the choice manufacture of ram PCB's, there were generally two layouts the early 808 and the later 815, both 6 Layer PCBs. People swear that ram chips soldered onto the early 808 pcb generally overclocked the best.

I spent hours researching which memory venders used BP pcbs, pretty much all the DDR1 ram I ever had used 808's. UCCC, TCCD, TCCC, CE-6, BE-5 all at some point were plonked on BP's.

These days people seem far less obsessed about these sort of little details, probably for the best I guess :D
 
Hesky82 said:
These days people seem far less obsessed about these sort of little details, probably for the best I guess :D
Click to expand...

I guess because even bog standard PC6400 ddr2 operates at a speed at/beyond a lot of peoples FSB clocks and things like pc8000/8500+ isn't much more expensive?

No point getting hung up on it!
 
Yup, it was all about memory bandwidth and latency timings back in the 939 a64 days. cpu's were hitting 300FSB back then and getting ddr1 ram to match that was pretty hard.
 
sastusbulbas said:
Hello all,

Newbie here, and it seems I'm the one that bought Greebo's Coersair memory.

Anyway, I am still playing with an old computer and constantly putting off building a better "New" rig.

I have my Corsair XMS 3200 2 gig Ram running at 2/3/2/6 200mhz with 2.5v, and have accidently got it running at 2/2/2/6 233mhz with 2.5v.

QUOTE]

Looks like you are doing well with them then. I can't remember the max I got with them but I had my fsb running at 273Mhz but I went for slower memory with tight timings since A64 prefer that. 5:6 rings bells which would make the memory running at 227Mhz.
Click to expand...
 
2-2-2-6 2.5v 233mhz is incredibly impressive.

If that's stable I think you've got gods own memory, especially for 2 x 1GB.
 
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