iconoclast Posted December 19, 2004 Share Posted December 19, 2004 I currently have two VS512MB400 modules in my Asus A7N8X-E Deluxe board. I'd like to add one VS1GB400C3 module. My questions are: * Will this work in the first place? * Is the CAS rating of the VS1GB400C3 3.0? Is this OK, given that the CAS of the VS512MB400 is 2.5? * Will my BIOS settings need to change? * What slots should I use? (I believe the two VS512MB400 would go in slots 1 and 2, while the VS1GB400C3 would go in slot 3, but I'm not sure.) Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted December 20, 2004 Corsair Employees Share Posted December 20, 2004 You are welcome to try it, but I would suggest you keep what you have now. In addition you should match what you have exactly or the system may not be stable or run at its full potential. Link to comment Share on other sites More sharing options...
iconoclast Posted December 20, 2004 Author Share Posted December 20, 2004 The problem with what I have now is that it's simply not enough anymore. And I can't afford to dump it and get two sticks of VS1GB400C3. I was under the impression that if anything, the overall memory setup would simply run at the slower of the two types of memory, which isn't a big deal. I'm not one to fret over a 0.5 CAS latency difference, with imaginary performance penalties. Already ordered it. I'll post back my experience, provided the computer still runs. :) Thanks for the input! Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted December 20, 2004 Corsair Employees Share Posted December 20, 2004 I would try and set the timings manually to Cass 2.5-3-3-8 and set the Dim Voltage to 2.8 Volts and test with http://www.memtest.org to be sure its stable. Link to comment Share on other sites More sharing options...
iconoclast Posted December 24, 2004 Author Share Posted December 24, 2004 Wow, that was easy! I started with the old VS512MB400 modules in slots 1 and 3 (technically, per the A7N8X-E Deluxe manual, the DIMM_A2 and DIMM_B1 slots). All I did was move one of those from DIMM_B1 to DIMM_A1 (i.e. to "slot 2"), then put the new VS1GB400C3 in DIMM_B1. This put 1 GB on each channel, for what it's worth. That's all I did. I kept the DDR voltage at 2.6, and also kept the BIOS set to SPD detection, and it ended up using 2.5-3-3-8. Everest shows the VS1GB400C3 as 3.0-rated, but I don't care, as long as it runs well. And it does. Ran Memtest-86+ on it, and BurnInTest Pro's "advanced" memory test. Not a single problem. Bye-bye, pagefile.sys! Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted December 26, 2004 Corsair Employees Share Posted December 26, 2004 Great news, but I would suggest you set the Dim Voltage to 2.7 Volts. Link to comment Share on other sites More sharing options...
iconoclast Posted December 26, 2004 Author Share Posted December 26, 2004 I appreciate the added advice, but it makes me curious. I've pounded the system hard--even using a special testing method that involves locking pages in memory with Windows XP running, allocating as much as possible of it, and testing various patterns--and there wasn't a single error, over many trillions of writing/reading operations. What is to be gained by raising the voltage? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted December 26, 2004 Corsair Employees Share Posted December 26, 2004 With 4 modules that could draw as much as 48 Watts just for the memory, so adding a bit more voltage will help make sure it stable long term. Link to comment Share on other sites More sharing options...
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