- Joined
- Jun 30, 2003
- Location
- Columbus, Ohio
What is the maximum bus speed that OCZ DUAL CHANNEL GOLD EDITION PC3700 RAM can run at and still have the 1:1 ratio?
Welcome to Overclockers Forums! Join us to reply in threads, receive reduced ads, and to customize your site experience!
SemiCycle said:I'm not knocking OCZ because I use their memory myself in one of my PCs, but after reading this article, it doesn'tmake me wonder if I will buy their products again. I'll you draw your own conclusions.
http://www.lostcircuits.com/memory/ocz3700/
mckennaiii said:mrspec3:
dr. michael schuette of www.lostcircuits.com calls a spade a spade.
know your facts before you speak, and don't let your mouth over ride your brain.
INTERNAL USE ONLY : ENGINEERING DEPT -TW-CA
Thermal modification of standard DDR DRAM TSOP packages , for increased thermal dissipation and speed reclassification.
Note #1 : Reference EL DDR packing specification is linked at /spec/elddr.html
Purpose :Increase speed of ( SEC packaged ) TSOP , through using EL DDR packaging theory. To fill product shortage during die revision change
EL DDR Packaging : by decreasing the thickness of encapsulate (low thermal transfer rate ) we are able to effectively increase heat dissipation in DRAM and thereby increase the effective speed of each IC . Using a third party fabrication and packaging plant this theory has been proven and the (B) die revision OCZ EL DDR die had great success. Average maximum speed increase during stage 2 testing has been verified over 23 MHz.
Proposition: While dies fabricated by 3rd parties for OCZ in 3rd party packaging have proven successful to this point . We feel that to insure our success we should supplement by speed binning large quantities of 3rd party IC's and by physically modifying the package decreased thermal resistance and re-speed grade the ICs using the standard Advantest ATE.
Licensing and Disclosure : We have negotiated an agreement with Samsung Semi to allow us to physical modify SAMSUNG brand ICs . Samsung Semi will provide us with pre-graded 466Mhz and 500Mhz ICs for modification. In Exchange we are to provide SEC with the complete EL DDR guideline . See Ryan Petersen for License agreement details.
Industry Disclosure: See Ryan Petersen
Process Engineering : See Mark Meir
Process Overview :
Samsung semi will provide die location information , we will be using the DP-7 CO 2 laser to remove the surface material from the package face only average laser cut depth is 7mill . After surface removal the package should be sent to ISE for environmental test and then re-speed graded after speed grade and classification chips will be marked ( standard process) and standard process thereafter
Heat Dissipation Data : Mark Meir
Pilot Test Result:
Due to the lack of yield from PCS on our C rev (gold series) 16x8 IC we will be supplementing gold series with the SEC products . The SEC product has significantly higher performance ( exceeding DDR 533 in certain cases ) and we should immediately move towards this solution during the interim : PCS and UMC D die test results are giving 95% preliminary yield above DDR 500 speed
6/3/03 NOTICE : THIS IS A LIMITED LIFESPAN PROCEDURE .
6//28/03 NOTICE : PCS and UMC have increased yields and D revision of the OCZ die is expected in the first week of July
7/03/03 NOTICE : ALL MODIFIED SAMSUNG TSOP ARE CURRENTLY BEING ALLOCATED TO PREMIER SERIES
* - note from mark , looks like some happy campers will be hitting DDR 533 plus with there premier series . Corsair will never know what hit them , there using the SEC TSOP , but with no thermal modification for there XMS 3700 we should be 30Mhz over there speed , and at CL 2.5. In addition I pretty sure there buying ICs off the open market , I am under the impression from speaking with ryan that SEC speed graded these to 500 3-4-4 before we even touched them . Another reason for us to give the customer more than what they pay for.
* note from Roy , wahooooooooooooo
Note from Ryan : Your engineering prowess has saved us once again. I am glad for one that through a time of low yields we were able to hold it together and even improve the quality of our bargain products . KUDOS
LostCircuits said:Also keep in mind that the disclosure was never done on the OCZ site until the article, rather it was posted on the Xtreme Systems forums only.