Marco71 Posted November 4, 2004 Share Posted November 4, 2004 Dear "Ram Guy", i've got one new Twinx pair for my Asus P4C800-E DLX but... I can't get P.A.T "enable" when i filled all 4 memory socket (512+512 MBytes-> Twinx XMS3200LL + Twinx XMS3200XL (the new one)). My latency settings are: 2-2-3-6-8 (D.D.R voltage-> AUTO). Thanks in advance "Ram Guy". P.S: Where i can get a datasheet for my older XMS150 (if i can...). A Corsair's lover. Marco71. Link to comment Share on other sites More sharing options...
Yellowbeard Posted November 4, 2004 Share Posted November 4, 2004 What is your FSB frequency? With 4 sticks, you lose PAT if you go above stock speed of 200mhz. Also, you are mixing to distinctly different types of RAM that have different ICs. Just to be certain, I'd test both pairs seperately at stock speeds and SPD timings. Mike. Link to comment Share on other sites More sharing options...
Marco71 Posted November 5, 2004 Author Share Posted November 5, 2004 Greetings from Italy... My system is not overclocked (all frequencies and voltages are within specifications) i.e F.S.B @ 200MHz... My question is about latencies configuration... As you know for XMS3200LL & i875P -> 2-3-2-6 (in B.I.O.S order); For XMS3200XL -> 2-2-2-5 ? Regards again. Marco71. Link to comment Share on other sites More sharing options...
Wired Posted November 5, 2004 Share Posted November 5, 2004 Yes, XL = 2-2-2-5, however when mixing memory types you cannot run them at those speeds. Try the 2-3-2-6, but you may have to try lower, like 2.5-3-3-7. Link to comment Share on other sites More sharing options...
Marco71 Posted November 5, 2004 Author Share Posted November 5, 2004 Greetings from Italy... I just tried Memtest+86 v. 1.27 with configuration described in topic... In memory bandwidth benchmark (2-2-2-5; PAT disabled) it reports 3084MB/s... With only one pair of Twinx XMS3200LL 512MB i only got 2725MB... PAT still not enable even with 2.5-3-3-7 (F.S.B @ 200MHz) settings... Regards... Marco71. Link to comment Share on other sites More sharing options...
Yellowbeard Posted November 5, 2004 Share Posted November 5, 2004 Also, keep in mind that on the AMI bios the timings are listed in a different order. For example, what is traditionally 2,3,2,6 on the AMI bios is 2,2,3,6 (make sure the RAS to CAS Delay is 3, not 2). Like Wired mentioned, you may need to run the latencies slower than the individual types will run since you are mixing 2 types. Also, set your RAM voltage up to 2.75v or 2.85v which is safe and within warranty. Good luck, Mike. Link to comment Share on other sites More sharing options...
Yellowbeard Posted November 5, 2004 Share Posted November 5, 2004 Greetings from Italy... I just tried Memtest+86 v. 1.27 with configuration described in topic... In memory bandwidth benchmark (2-2-2-5; PAT disabled) it reports 3084MB/s... With only one pair of Twinx XMS3200LL 512MB i only got 2725MB... PAT still not enable even with 2.5-3-3-7 (F.S.B @ 200MHz) settings... Regards... Marco71. What do you mean by " PAT still not enable" ? Do you mean Performance Acceleration Mode? If so, this is not PAT. And, how are you testing to determine if PAT is enabled? PAT is a function of the chipset and cannot be manually turned off and on. If you are talking about the P.A.M. set this to Standard. Mike. Link to comment Share on other sites More sharing options...
Wired Posted November 5, 2004 Share Posted November 5, 2004 I would suggest you set the timings to Cass 2.5-3-3-7 and set the Dim Voltage to 2.85 Volts and set the performance mode to standard, this will force PAT to be enabled! However, with 4 modules it may by default disable PAT! In otherwords, with 4 modules it may not be possible to enable PAT! Link to comment Share on other sites More sharing options...
Marco71 Posted November 5, 2004 Author Share Posted November 5, 2004 Thanks to everyone for your replies... I guess that i875P P.A.T have some problems due to increased physical path when there's 4 sockets filled...am i wrong ? The Intel Chipset Platform Configuration Utility reports as follow: "Performance Acceleration Technology Activated"; Cpu-Z v. 1.24: "Performance mode disabled". Marco71. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 5, 2004 Corsair Employees Share Posted November 5, 2004 Yes, by default with more than 2 modules it will disable PAT! Link to comment Share on other sites More sharing options...
Marco71 Posted November 5, 2004 Author Share Posted November 5, 2004 P.A.T -> "Performance mode" by Asus (i.e "Auto"-"Standard"-"Turbo" b.i.o.s settings); "Performance acc. technology" -> in hardware by i875P M.C.H...right ? They're different things... As i stated before the "Intel Chipset Platform Configuration Utility" v. 1.03 reports "Performance acc. technology" activated... Thank you again "Ram Guy"... Marco71. Link to comment Share on other sites More sharing options...
Yellowbeard Posted November 5, 2004 Share Posted November 5, 2004 P.A.T -> "Performance mode" by Asus (i.e "Auto"-"Standard"-"Turbo" b.i.o.s settings);Marco71. Actually this is P erformance A cceleration M ode or P.A.M. not P.A.T. But, yes, they ARE 2 different things. Mike. Link to comment Share on other sites More sharing options...
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