UTT, BH5, and CH5: a couple of questions for those who are memory literate

[TStep]

Maybe it's just my recollection, but there were a few things I thought to be true about BH5 and CH5:


-BH5 made on 150nm process and CH5 on 130nm. Just what are UTT then? Are there UTT based on BH5(150nm) and UTT based on CH5(130nm)? The following has me a little confused.

From Anandtech's Mushkin Redline article: "It appears that Mushkin uses Winbond CH-die for their Redline memory, the same as OCZ. We say "appears" because most manufacturers using the Winbond UTT chips buy them as blanks and bin them for their speed ratings, so it is very difficult to identify exactly the chips used for the finished product. You can also find BH blanks on the market as well, and the finished product in either CH or BH depends mostly on the "speed-binning" capabilities of the memory manufacturer."


-In the past BH5 was always voltage hungry, the more the merrier; CH5 would quit responding to voltage at around 2.8-2.9v IIRC (experience from Mushkin PC3500 Lvl I and OCZ PC3500 EL). From the same quote above, if there is UTT based on CH5, why is it responding to voltages over 3.0v in a similar fashion to the old BH5? Is there something different between old and new BH5 and CH5?


-In the past, CH5 usually carried the tightest ratings 2-3-2-X, and I've experienced that with the Mushy PC3500 Lvl I. No 2-2-2-X was possible after many attempts on an 865 setup. Why is it possible now to get 2-2-2-X with CH5? Does the CH5 respond to 2-2-2 because of the A64 platform or is there something else going on?


-I've seen it stated in reviews "the new BH5". Is there a new revision to BH5? Or is this just commenting on the new availability?


-Lastly, the Mushy Redline and some OCZ Value VX is rated 3-3-3-X at 2.6v. In the past, I could not get BH5 to boot at Cas 3 regarless of speed. Actually BH5 didn't really differentiate too much between Cas 2 and 2.5 for max speed. What is going on there? Why can UTT work at Cas 3 now when it would not boot before? I guess it goes right back to "Is UTT the same as BH5 from 2-3 years ago?".


-Edit: Forgot to ask: In the past CH5 was limited to about 230-240 IIRC. Is the UTT thats hitting 260+ BH5 or CH5 based?


TIA

 

[fscussel]

UTT means UnTesTed, it's just a huge amount of memory modules that you don't know what they are, so the company buy them and test them to see how good they perform and the sell them in specific categories. When buying those modules from Winbond, the companies sometimes receive BH series modules and CH series modules, but it's not written in the modules, but they know somehow, so they sell those as BH-UTT and CH-UTT... it's not the same as the old BH-5 and old CH-5, but they probably are very similar, one difference you can tell is that BH-5 didn't produce too much heat, and the BH-UTT does produce a lot of heat. One question I have is why OCZ and Mushkin are using CH-UTT in their top memories (VX and redline) and not BH-UTT....?????

 

[coomar]

the bh dyes seem more hit and miss than the ch utt

redline and ocz gold aren't really utt, they're been burned in and speed binned for ddr250

the new utt's are not the same as original bh-5 dye

essentially winbond ran into money problems and closed to bh-5 dye fab, last year it got a huge cash infusion from a european conglomerate and re-opened the ch and bh fabs

so its new ic's built on the old process, since bh dye seems to harder to get, it looks like winbond has switched to ch

at any rate, its probable that they will stop making this eventually, this ram is usually cheap so its not like their making that much on it, it does raise buzz for winbond and let everyone know their back in business and samsung has competition

 

[fscussel]

well, if you remember the OLD CH-5 and old BH-5, BH-5 was much better than CH-5, so I think the same should apply here, I would like to know how many of the PC3200 GOLD wich uses BH-UTT are hitting 250mhz, any ideias?

 

[coomar]

all ocz vx is ch dye

the other companies seem to be mixing and matching left

corsair c2, the newest one is bh-5 utt
geil values, some are bh-5 utt
mushkin c2 are bh-5 utt

it looks like the ch5 are getting better oc's, all the ddr500 utt are ch dye

 

[Hacp]

Ok basically UTT is untested.. It can be both CH-5 or BH-5. I usually call any winbound memory UTT . Supposedly, the NEW CH-5 is supposed to overclock better at voltages over 3.3 while BH-5 is supposed to overclock better with voltages from 3.0-3.2. I know that the Old CH-5 was a failure and had trouble overclocking. IMO, there is no difference for me in CH-5 and BH-5, as long as they can get around 240 2-2-2-X at 3.3 volts .

 

[RichUK]

Originally posted by: fscussel
UTT means UnTesTed, it's just a huge amount of memory modules that you don't know what they are, so the company buy them and test them to see how good they perform and the sell them in specific categories. When buying those modules from Winbond, the companies sometimes receive BH series modules and CH series modules, but it's not written in the modules, but they know somehow, so they sell those as BH-UTT and CH-UTT... it's not the same as the old BH-5 and old CH-5, but they probably are very similar, one difference you can tell is that BH-5 didn't produce too much heat, and the BH-UTT does produce a lot of heat. One question I have is why OCZ and Mushkin are using CH-UTT in their top memories (VX and redline) and not BH-UTT....?????

are you fo shizel, that UTT means "UnTesTed"

 

[coomar]

yes utt means untested (above a certain point)

gold vx and redline aren't true utt in that sense

utt now improperly refers to vx (ram that loves the voltage)

 

[fscussel]

One question I have is why OCZ and Mushkin are using CH-UTT in their top memories (VX and redline) and not BH-UTT....?????

 

[mrkun]

Just to clarify: OCZ Value VX is now using BH/UTT chips. Originally, they were using CH/UTT (this is the type that Anand reviewed in their Value RAM Roundup).

 

[Hacp]

What value VX? I see no value VX

 

[fscussel]

value vx is gone...