rezin69 Posted June 16, 2005 Share Posted June 16, 2005 I have a 350064AMD in an ASUS A8V deluxe. Originally I had 2xs512MB Value select corsair (The machine was bought from Scan). I recently have purchased another 2x512mb value select and installed into the black slots and nothing happens when I turn the machine on! When I take them out its all fine, if i put the new sticks into the blue slots and remove the old RAM it works.... Please help! Is this a BIOS issue? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted June 16, 2005 Corsair Employees Share Posted June 16, 2005 Please test the modules one at a time with http://www.memtest.org and lets make sure one is not failing and that they are all set the same timings. Link to comment Share on other sites More sharing options...
rezin69 Posted June 16, 2005 Author Share Posted June 16, 2005 OK I had 5 mins tonight to check with that program. With the original 2x512mg in place there were no errors and it read: - 200MHZ(DDR400) 2.5-3-3-8 Dual channel 128bits With the new 2x512MB's in place it read the same apart from the timings were: - 3-3-3-8. Also no errors So how do I correct this please? Link to comment Share on other sites More sharing options...
Wired Posted June 16, 2005 Share Posted June 16, 2005 Correct what? What is the exact part name of each stick? Link to comment Share on other sites More sharing options...
rezin69 Posted June 16, 2005 Author Share Posted June 16, 2005 Do I need to change the timings on the RAM to make them match? The exact numbers are: - Both sets are VS512MB400C3 Then 1 set is SCIL - 836458938 and the other SCIL - 005414300 Just need to work out how to make the machine boot!!! Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted June 16, 2005 Corsair Employees Share Posted June 16, 2005 Please follow the link in my signature “I think I have a bad part!” and we will be happy to replace the modules that are running at the correct timings. Link to comment Share on other sites More sharing options...
rezin69 Posted June 17, 2005 Author Share Posted June 17, 2005 Why replace the RAM that's running at the correct speed? Also what is the correct speed?! Sorry for using up your time but I'm a little confused by the situation, should I not just return the RAM to SCAN whom I bought it from? Are you pretty sure that if I get sent RAM with the correct timing then the system will work? Why do different RAM modules have different timing, I thought that I should just be able to buy more RAM from the same range and it would just slot in? Many Many Thanks for your help Link to comment Share on other sites More sharing options...
rezin69 Posted June 17, 2005 Author Share Posted June 17, 2005 So is the problem the timing on 1 set was at 2.5 and the other at 3? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted June 17, 2005 Corsair Employees Share Posted June 17, 2005 Yes, VS1GBKit400C3 should be set to Cass 3-3-3-8 or 3-4-4-8. Link to comment Share on other sites More sharing options...
rezin69 Posted June 17, 2005 Author Share Posted June 17, 2005 fantastic, my final question si how do I change the timings on this motherboard please? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted June 17, 2005 Corsair Employees Share Posted June 17, 2005 With this platfor all of the modules would need to exactly matched or it may not post or be stable. And you can set the timings in your bios setup usually under advanced chipset. Please check your manual for more details. Link to comment Share on other sites More sharing options...
rezin69 Posted June 18, 2005 Author Share Posted June 18, 2005 So under the RAM setting on my Motherboard I have: - CAS Latency, TRC,TRFC, TRCD, TWR, TRWT, TRAS, TRP, TWCL, Asynclat, read preamble setting, 2T command. I have no ideas what this means and the manual doesn't say. Are any of these the timings i need to make 3-3-3-8 Link to comment Share on other sites More sharing options...
ferry_g Posted June 18, 2005 Share Posted June 18, 2005 Suppose you're using CL 3-4-4-8 ram, then set TCL = 3 TRCD = 4 TRP = 4 TRAS = 8 TRC = TRP + TRAS (12) TRFC = TRC + 3 (15) TWCL = 1 Max async latency = 7 ns Read Preamble = 5.5 Set 1T/2T = 1T if unstable switch to 2T...,but usually if you're using TwinX, they would run in 1T :): Link to comment Share on other sites More sharing options...
Wired Posted June 20, 2005 Share Posted June 20, 2005 TRC = TRP + TRAS (12) TRFC = TRC + 3 (15) TWCL = 1 Max async latency = 7 ns Read Preamble = 5.5 Where are you getting those settings from? Link to comment Share on other sites More sharing options...
ferry_g Posted June 20, 2005 Share Posted June 20, 2005 Where are you getting those settings from? I have 2 sources where I got this formula. From A8N SLI deluxe auto bios setting using several brand value memory (detected by CbID, A64 tweaker, Everest) and "other's" comprehensive memory guide that I can PM you. When I set this formula in ASUS A8N SLI Deluxe, it worked 100% without error, but not in SLI-DR, although the retailer replaced a new board for me. These setting with XLPT still unstable in SLI mode only in SLI-DR mb. So I gave up and sold the board. When I've problem with DFI nF4 SLI-DR, I asked Oskar Wu by PM how to set Corsair timing, and he replied set max async. latency 7, read preamble 5.5, if problem still exist could be problematic mb and the mb should be RMA. Link to comment Share on other sites More sharing options...
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