waynebretl Posted November 3, 2006 Share Posted November 3, 2006 Bought (4) CMX1024-3200PT for use in ASUS A8N-SLI Premium motherboard with AMD Athlon 64 X2 dual core 4800+. Seems to run OK with only 2GB installed, but with 4G, get random reboots/ stop errors. Should I be using a different model of mem modules? Also, I don't know how to find settings for latency, but I assume that's around here somewhere. Have tried adjusting the voltage, which does not help. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 3, 2006 Corsair Employees Share Posted November 3, 2006 Ddi you test the system with http://www.memtest.org one set at a time, and do you have the latest bios and what are the exact settings you have set with all four installed? Link to comment Share on other sites More sharing options...
waynebretl Posted November 3, 2006 Author Share Posted November 3, 2006 Ddi you test the system with http://www.memtest.org one set at a time, and do you have the latest bios and what are the exact settings you have set with all four installed? 1) I have the latest bios downloaded/installed. 2) Have not run memtest - Will run the test one at a time tonight 3) Can't find where to see/adjust the latency settings - bios does show voltage setting Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 3, 2006 Corsair Employees Share Posted November 3, 2006 Its under CPU configuration please check your manual under section 4. And please let me know how you make out with memtest. Link to comment Share on other sites More sharing options...
waynebretl Posted November 4, 2006 Author Share Posted November 4, 2006 Ran memtest one stick at a time ( as suggested by ASUS), and all 4 test OK. Suspected as much, as things seem to run OK wiht any combo of 2 sticks installed. checking latency settings: parameter value with 2 sticks(OK), with 4 sticks(get crashes) timing mode [auto] [auto] memclock index value 400 MHz 333 MHz cas# latency Tcl 3 3 min ras# active time (Tras) 8T 7T ras# to cas# delay (Trcd) 3T 3T row prechargte time (Trp) 3T 3T row cycle time (Trc) 11T 10T row refresh cyc time 13T 11T read-to-write time (Trwt) 5T 4T write recovery time (Twr) 3T 3T 1T/2T memory timing 2T 2T S/W DRAM OVER 4G remapping [enabled] [enabled] H/W DRAM OVER 4G remapping [enabled] [enabled] Link to comment Share on other sites More sharing options...
Yellowbeard Posted November 5, 2006 Share Posted November 5, 2006 With 4 DIMMs installed, I would suggest 2.8v Vdimm. Link to comment Share on other sites More sharing options...
waynebretl Posted November 5, 2006 Author Share Posted November 5, 2006 Tried 2.8 V, also tried setting latencies manually to same number of cycles as with [auto] and 2 sticks (but setting clock at 333 Mhz). No luck, still get crashes with 4 sticks installed. Link to comment Share on other sites More sharing options...
RJLeong65 Posted November 5, 2006 Share Posted November 5, 2006 Have you thought about your power supply unit? It may not deliver enough +12V capacity to power your current configuration. You see, in the case of that Antec SP500 of yours, 17A plus 19A does not equal 36A due to loading issues in a PSU with multiple +12V rails. Its real combined +12V capacity is only about 29A - but that Radeon X1900XT needs a PSU with at least 32A combined on the +12V rail(s) even for single-card configurations. Link to comment Share on other sites More sharing options...
Yellowbeard Posted November 5, 2006 Share Posted November 5, 2006 Have you thought about your power supply unit? It may not deliver enough +12V capacity to power your current configuration. You see, in the case of that Antec SP500 of yours, 17A plus 19A does not equal 36A due to loading issues in a PSU with multiple +12V rails. Its real combined +12V capacity is only about 29A - but that Radeon X1900XT needs a PSU with at least 32A combined on the +12V rail(s) even for single-card configurations. Very good info RJLeong65, I did not catch that. Link to comment Share on other sites More sharing options...
RJLeong65 Posted November 5, 2006 Share Posted November 5, 2006 Very good info RJLeong65, I did not catch that. Not only that, but that SP500's 17A +12V1 rail is shared between the 24-pin ATX power, the peripherals, the SATA drives and the PCI-Express cards. The 19A +12V2 rail is used only for the 4-pin ATX12V P4-style connector. And unlike some of the newer-design multi-rail PSU's, the SP500 cannot reserve extra power from the +12V2 rail even if the +12V1 rail is already maxed out. In other words, the X1900XT draws more power from that weaker +12V1 rail than it can handle -- which is why you're getting occasional stability issues, especially with 4 double-sided memory modules installed. Link to comment Share on other sites More sharing options...
waynebretl Posted November 7, 2006 Author Share Posted November 7, 2006 Thanks for the warning on the PSU. The cross-loading is definietly a disappointment. I'm going to double check that the two 12V connections are as you say - then it looks like a bigger PSU is in order. Link to comment Share on other sites More sharing options...
waynebretl Posted November 7, 2006 Author Share Posted November 7, 2006 Didn't have a chance to check power supply droop with 4 sticks, however, did some looking for power supply specs, and here's the problem: I have a note from ASUS recommending a power supply with 35A rating on the +5V. Most/all of the higher wattage supplies with multiple +12V outputs have lower +5 (and +3.3) ratings (typically 30A on the +5). So, I'm at a loss as to what supply really is proper for this mobo with full memory etc. The Antec supply has the 35A rating, but does the machine really use less 5V and need more 12V? Any thoughts? I know the total +5 and +3.3 outputs are really limited to some lower value by a total watts rating, but don't know how to compare this to the ASUS supplied numbers - which output is really the power hog? Link to comment Share on other sites More sharing options...
RJLeong65 Posted November 7, 2006 Share Posted November 7, 2006 Didn't have a chance to check power supply droop with 4 sticks, however, did some looking for power supply specs, and here's the problem: I have a note from ASUS recommending a power supply with 35A rating on the +5V. Most/all of the higher wattage supplies with multiple +12V outputs have lower +5 (and +3.3) ratings (typically 30A on the +5). So, I'm at a loss as to what supply really is proper for this mobo with full memory etc. The Antec supply has the 35A rating, but does the machine really use less 5V and need more 12V? Any thoughts? I know the total +5 and +3.3 outputs are really limited to some lower value by a total watts rating, but don't know how to compare this to the ASUS supplied numbers - which output is really the power hog? Your configuration simply needs more +12V capacity. But since there is no current multiple +12V rail PSU with a reasonably low overall wattage rating (or at a reasonable price point) which provides both high +5V capacity and a high +12V capacity, the only current way to get a suitable PSU for your config is to buy far more wattage than your system really needs (this means that you may need a 750W or higher-wattage PSU, and spend a relatively astronomical amount of money for such a unit, just to get sufficient capacity on both the +5V and +12V rails). Link to comment Share on other sites More sharing options...
waynebretl Posted November 7, 2006 Author Share Posted November 7, 2006 I was afraid of that. Let the search begin! Link to comment Share on other sites More sharing options...
RJLeong65 Posted November 7, 2006 Share Posted November 7, 2006 I was afraid of that. Let the search begin! I forgot to tell you that since you have some motherboard devices using the +3.3V rail, the +5V capacity of your current PSU will drop to 28A when both the +3.3V and +5V rails are being used. This is due to the fact that the +3.3V and +5V rails on your PSU both share the same tap, with a single commonly shared limiter for both rails. Link to comment Share on other sites More sharing options...
waynebretl Posted November 8, 2006 Author Share Posted November 8, 2006 I've been running ASUS PCProbe now, and I'm seeing the same voltage reading variations with 2 sticks or 4 (readings set to update at max rate, once per second)Core 1.36-1.383.3V 3.22-3.255V 4.92-4.9512V 12.10-12.35 So, no evidence that the added memory is pulling down the 12 volts or anything else, although both the 3.3 V and 5V are a bit low in general. Of course, there could be some transients too short to see with the probe program. Anyway, I have ordered an auxiliary 12V supply just to run the graphics card. Cheaper than a whole new humongous supply. It's a 300 watt (2x 150 watt 12 volt outputs) that fits in a spare 5 inch bay and is supposed to automatically turn on and off with the main supply. I'll see if that helps. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 9, 2006 Corsair Employees Share Posted November 9, 2006 First please use http://www.memtest.org to test the hardware not Windows. If you are not getting errors in http://www.memtest.org but have problems with Windows there would likely be some other problem. But just use http://www.memtest.org alone first! Link to comment Share on other sites More sharing options...
waynebretl Posted November 9, 2006 Author Share Posted November 9, 2006 As stated somewhere above, I did use memtest to test the sticks one at a time, and they werre all OK. Do you mean I should use memtest to test all 4 at once? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 9, 2006 Corsair Employees Share Posted November 9, 2006 Yes and with 4 modules you may have to under clock the memory because of loading on the memory controller. This is normal! Link to comment Share on other sites More sharing options...
waynebretl Posted November 10, 2006 Author Share Posted November 10, 2006 Ran memtest for two full cycles last night with 4 sticks installed, no errors - headscratching time Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 11, 2006 Corsair Employees Share Posted November 11, 2006 That might suggest a power problem, can you barrow a bigger better PSU? Like our HX520W would be a good choice! Link to comment Share on other sites More sharing options...
waynebretl Posted November 12, 2006 Author Share Posted November 12, 2006 Well, I have now tried the auxiliary 12 volt supply for the graphics card, and it still shows the problem. I don't see any point in changing the main supply, because it has higher ratings individually (amps) and combined (watts) for the 5V and 3.3 V than the one recommended above, and meets ASUS recommendations. At this point, I think I will just run with 2GB RAM and sell the other two sticks, unless someone comes up with some really brilliant idea. The problem only occurs when running XP, not when testing with memtest, so it seems it must be an OS/driver bug that doesn't handle the full memory correctly. :[pouts: Link to comment Share on other sites More sharing options...
waynebretl Posted November 14, 2006 Author Share Posted November 14, 2006 Just for funsies, turned the memory clock down to 200 MHz - still have a problem. 2GB seems to run my biggest photo stitching projexts without bogging down, so there it will stay. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 15, 2006 Corsair Employees Share Posted November 15, 2006 Do you have another HDD that you can use to try a fresh Install of the OS? Link to comment Share on other sites More sharing options...
waynebretl Posted November 17, 2006 Author Share Posted November 17, 2006 Do you have another HDD that you can use to try a fresh Install of the OS? Afraid not Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.