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I just got my 2 Speed Premuim sticks, hopefully they will do better than my first two of the Twinmoss AA4T Dual pack, they maxed at 3.4V 238fsb 2-2-2-8 I notice they had the 50D and these have the 44D part number so maybe I'll have better luck.
I'm going to start with a nice 3.2V burn in
Edit: Very pleased with these bad boys
3.2Volt = 249fsb 2-2-2-8
3.3Volt = 252fsb 2-2-2-8
3.4Volt = 254fsb 2-2-2-8
Still cooking on 255FSB 3.4v :D
Hi all,
My 2 x 512mb AA4T, 50D have been running well at 250 1t-2-2-2-5-7-14 for weeks now this morning no boot memory error clear cmos same prob. Back to BH5 2x256 mb boot up.Try 1 stick at a time memory error on diagnostic LED's again no boot!! Any suggestions?
What voltage did you feed the sticks with and how did you cool them?Quote:
Originally Posted by pazza316
Me wonders the same thing?Quote:
Originally Posted by celemine1Gig
3.5 volts 125 cfm 12cm fan! Should be enough cooling same as I used to get 277FSB from BH5 @ 3.7 volts stable!!
Agreed, that should keep them cool. Do you have another system to try them in? When you tried them did you reset to default with your BH5 or are you hitting them with 3.5Volt?
I remember reading about a guy doing the same thing, removed his sticks and considered them dead. A few weeks later he dropped them back in and they worked fine.
Na I am resetingthe CMOS before retrying them! I think they are dead. No other system to try em in. My other systems are sdram!!
I have the same problem as you. My sticks have been running 24/7 at 265 @ 3.4v, cooled with a 12cm fan that kept them cool.Quote:
Originally Posted by pazza316
One day, my rig don´t boot up, I cleared cmos, swapped the sticks from slots, and tried them separate. I have found that one stick is dead, and the other is fine. I have to try it in another system, to confirm that it is dead, but I think that it is... :( :(
3.3v+ is probably just more than the ram can handle. The ICs are rated for 3.6v, but that doesn't mean any of the voltage regulators, resistors, or caps are rated for those high voltages. OCZ VX uses components rated for these higher voltage levels, thats why you can get away with it with those.
Quote:
Originally Posted by cartmanea
I agree with this guy....
Yes, One of my sticks has been exhibiting this phenomenon. Runs awesome for weeks, then one day .... BEEEEP. Its one stick. Nothing would "clear" the error. But taking it out, leaving it aside for a few hours while I used a different stick and VIOLA... "bad" stick is back running for weeks flawlessly.
Like some latch-up problem (a problem that can effect CMOS circuits) gets the ram in a locked up state, a long sit with no power and the chips bleed to no electrons and presto its back up and running.
This would be pointing to motherboard signal integrity and power supply (the VDimm circuit) issues. The high voltage, and high current and high speed we are pushing these things too is taxing the rest of the system beyond what it is used to. This isnt a permanent damage issue, just a symptom of poor signal integrity, PCBoard and component quality. The RAM itself is fine, the latchup is occuring probably to UNDERSHOOT on some of the signal lines....ie: instead of a "0" being 0 volts, it was driven lower due to circuit bounce to some -X volts low enough to trigger the latchup, which then freeze's the circuit inside the DDR chip(s) until they are truly turned OFF and all charge is drained away.
This is all speculation, but the symptoms (bad ram miraculously coming back to life) sure sounds like the situtation.
I wish I had a scope fast enough to "SEE" the signals while operating, but that's some seriously expensive equipment...500Mhz dataline data rates would need a 2GHz digital storage scope to properly sample.
Above all dont panic if the BEEEEEEP pays you a visit.
I bought the value TwinMos form newegg here
http://www.newegg.com/app/ViewProduc...218-062&depa=1
and guess what. They are NOT winbond chips. Only have one dot and bottom right. So guess not Twinmoss is NOT giving UTT anymore for value chips. This mems perform only 2.5-3-3-8 @ 235. Won't go any higher even after burning. Won't matter the juice u give, won't pass 235 htt. Burned them for 2 days. Same thing.
So be aware. Don't buy the new value form Twinmos. Btw here stays some info:
0508D
TMD7608F8E501
i got twinmos mtec "value" 05094 AA4T .. about 20 sticks about 2 weeks ago, and its all good.
what you got is 0508D .. thats not good..
so it's still random thing from value twinmos..
@unwackme : that's a great information! thanks.. theres a friend of mine got the same problem, i'll tell him right away.. :toast:
Those ones never were guaranteed UTT, its the Speed Premium that is.
Yeah I got the same ones from Newegg and they seem to top about about the same as yours. I took a gamble on the budget modules, but I cannot really complain since it is for my backup rig anyway and it was only $103.Quote:
Originally Posted by MonkSP
Totaly lost track of this thread.
Ive got 4x 256mb sticks of Twinmos SP AA4T. They all do around 250 range DC 2-2-2-5 @ 3.3v. Havnt tested them further. Havnt had the DFi out of the case yet, to add 'good' cooling over the 4vdimm mosfet ;) Will do later on when I get my xeon rig up and running.
Anyways, so AA4T is UT CH-5? 1A4T is UTT BH-5?
Does the 1A4T come in 3500 SP and 3200 SP flavours?
Was looking around the egg and how about these? chance of being oldskool BH-5 ?
i got 512x2 twinmos AA4T Hits to 270 2-2-2-5 with 3.4v.
Got any screenshots to verify that ? verified cpu-z shot ?
CorrectQuote:
Anyways, so AA4T is UT CH-5? 1A4T is UTT BH-5?
3500 SP onlyQuote:
Does the 1A4T come in 3500 SP and 3200 SP flavours?
No. I hope this helped you. :)Quote:
Was looking around the egg and how about these? chance of being oldskool BH-5 ?
Thanks Sparkie.
Thought I saw some 3200 sticks being 1A4T when people first discovered 1A4T being the new BH die.
Anyone seen 3500 SP in 256mb sticks?
Nope, but these look to be. Just not exactly a bargain by today's pricing. It is however, a brand new retail stick of KHX PC3200 (non A) with warranty. At $240 per gig.Quote:
Originally Posted by Bennah
http://www.zipzoomfly.com/jsp/Produc...ctCode=80097-9
$240? At that price point you might be better off with 1Gig of the "new school" BH speed binned by either G.Skill or OCZ, for about $40(USD) less. Or you could just pick up 1Gig of the CH UnTesTed from any number of places for about $100-$140. If you get 240+ without volts at levels that won't have you posting a message weeks or months later regarding the mysterious death of one of your sticks, count yourself lucky and put the saved money into your CPU or video card budget. :)
I can't justify buying of the new BH/CH UTT since my old Mushkin BH-5 will do 250 at 3.3v rock steady straight through hours of gaming. Still its tempting when I see 2x512mb at very cheap prices. Geil Ultra Series Value Dual Channel Kit 1GB(512MBx2) DDR PC3200 w/ Blue Heatspreader $95
Sparkie UTT BH-5 comes with PC 3200 SP sticks too. I know 2 guys that have them.
I Have 1A4T 3200, here's short test 215 @ 2-2-2-5 1T vdimm 2.8 volt
http://img.photobucket.com/albums/v6..._215_spi8m.jpg
And this my old Twinmos Speed Premium UTT AA4T "04464" doing 274 MHz FSB @ 1.5-2-2-0 1T with vdimm 3.6 volt :D. Still loving this old ones.....
http://img.photobucket.com/albums/v6...-0sisandra.jpg
http://img.photobucket.com/albums/v6...5-2-2-0spi.jpg