scottsmith Posted February 3, 2005 Share Posted February 3, 2005 I had periodic random glitches when compiling programs, so I ran memtest86 (a kernel off the Gentoo Linux LiveCD), and it says I have bad memory. System is Asus A8V, Athlon64 3500+ Winchester, and Corsair TWINX1024-3200XL. I am not overclocking. I don't suppose I can swing by (I live near Fremont) and have the modules checked in person? I'd sure save me the hassle of mailing and waiting. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted February 3, 2005 Corsair Employees Share Posted February 3, 2005 I am sorry we are not really setup to do any type of over the counter service like that. But I would be happy to get you a RMA and replace the modules if you like. You can talk to customer service about dropping them off and picking them up. Please follow the link in my signature “I think I have a bad part!” and we will be happy to replace them or it! Link to comment Share on other sites More sharing options...
scottsmith Posted February 3, 2005 Author Share Posted February 3, 2005 I am sorry we are not really setup to do any type of over the counter service like that. But I would be happy to get you a RMA and replace the modules if you like. You can talk to customer service about dropping them off and picking them up. Please follow the link in my signature “I think I have a bad part!” and we will be happy to replace them or it! oh well; btw I just ran memtest86 on each RAM independently, and one passed perfectly while the other came back with a bunch of errors. So at least I can use my computer for a while, just with half the ram (and less performance). at least I know now it isn't the mobo DIMM slot or the CPU's dual DDR controller. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted February 3, 2005 Corsair Employees Share Posted February 3, 2005 Can you tell me the make and model of MB you have along with the CPU speed and it’s FSB as well? In addition, please tell me the bios settings you have set for both CPU and memory and any performance settings that you may have set? Link to comment Share on other sites More sharing options...
scottsmith Posted February 3, 2005 Author Share Posted February 3, 2005 Can you tell me the make and model of MB you have along with the CPU speed and it’s FSB as well? In addition, please tell me the bios settings you have set for both CPU and memory and any performance settings that you may have set? As I mentioned before, it's the Asus A8V. The Athlon64 3500+ Winchester has a 200MHz front side bus and a 2.2GHz internal clock speed. I am not overclocking it -- the "AI Overclocking" BIOS option was set to "Auto"; I also tried "Manual" and "Standard" to no avail (no, I didn't try the 3%, 5%, 7%, 10%, or "Adaptive" overclocking options). For memory, I left it at auto. Basically I'm not trying to do anything funny. Heck if I was going to overclock I wouldn't have bought DDR400 memory, I would have gotten something capable of running faster. Since I tried each DIMM independently, and found one to be bad and one to be good, it's a pretty clear indication that one DIMM went bad somewhere. oh, and memtest86 reports the CPU to be 2203MHz, so that also indicates no overclocking is taking place. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted February 3, 2005 Corsair Employees Share Posted February 3, 2005 Well not always, I would try and set the Dim Voltage to 2.8 Volts and then test the suspect module. If that passes http://www.memtest.org please try the modules installed in slots 2-4 and test the system with http://www.memtest.org to be sure! Link to comment Share on other sites More sharing options...
scottsmith Posted February 3, 2005 Author Share Posted February 3, 2005 Well not always, I would try and set the Dim Voltage to 2.8 Volts and then test the suspect module. If that passes http://www.memtest.org please try the modules installed in slots 2-4 and test the system with http://www.memtest.org to be sure! 1. turns out the memtest86 I was running was really memtest86+ v1.11. So the following tests will use memtest86+ v1.50, which seems to be the latest on http://www.memtest.org. Interestingly, memtest reports the CAS to be 2-3-2-5, instead of the 2-2-2-5 that I thought the TWINX1024-3200XL was supposed to be? The full info is: Athlon 64 (0.09) 2203 Mhz L1 Cache: 128K 18056MB/s L2 Cache: 512K 4486MB/s Memory: 511M 1304MB/s Chipset: VIA K8T800Pro (ECC : Disabled) Settings: RAM : 200 Mhz (DDR400) / CAS : 2-3-2-5 / Single Channel (64 bits) All the memory settings in BIOS are set to AUTO. 2. Asus seems pretty particular on which slots they want you to use depending on how many DIMM's you have. One DIMM -> B1; Two DIMMS -> A1,B1. Four DIMMS -> A1,A2,B1,B2 (with matching pairs A1/B1 and the other pair A2/B2). BTW, originally the faulty DIMM was in A1; when it was moved to B1 it was still faulty. This seems to point at the DIMM, not the mobo. BTW when I do try moving the DIMM to A1 instead of B1 (leaving B1 blank), the system fails to boot and says "System failed to boot due to overclocking" through the speakers. Which is really amusing because I'm not overclock at all. Moving the DIMM back to B1 allows it to boot. I was wondering if I possibly got a remarked CPU, but all the programs that detect the CPU and its characteristics agree with what I bought -- an Athlon 64, 90nm, 3500+ (2.2GHz clock speed), 200MHz front side bus (DDR400). 3. DDR voltage was set to AUTO. Options are AUTO, 2.6V, 2.7V, and 2.8V. Here are the results from varying the voltage: GoodDIMM BadDIMM AUTO pass fails memtest 2.8V pass pass Though since the memory is supposed to work at 2.5V, I'd rather not run it at 2.8V. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted February 4, 2005 Corsair Employees Share Posted February 4, 2005 Though since the memory is supposed to work at 2.5V, I'd rather not run it at 2.8V. First thing, our XMS3200XL have a minimum suggested voltage of 2.75 Volts and on this MB I would set it to 2.8 Volts. I am sorry but I think you were miss-informed about the voltage. I would try them with the voltage set to 2.8 volts and make sure they both run in dual channel. By the way the voltage is listed on the data sheet and under XMS Qualifications and Testing for this module. Link to comment Share on other sites More sharing options...
scottsmith Posted February 4, 2005 Author Share Posted February 4, 2005 fyi, if I adjust the timing to 2-2-2-5, the good DIMM still passes, but the bad DIMM won't pass with DDR Voltage set to either AUTO or 2.8V. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted February 4, 2005 Corsair Employees Share Posted February 4, 2005 Then lets get them replaced. Please follow the link in my signature “I think I have a bad part!” and we will be happy to replace them or it! Link to comment Share on other sites More sharing options...
scottsmith Posted February 4, 2005 Author Share Posted February 4, 2005 Then lets get them replaced. Please follow the link in my signature “I think I have a bad part!” and we will be happy to replace them or it! OK Thanks for all your help! And sorry, yes I was misinformed about the 2.5V. I don't know where I got that from. BTW, do you know why the mobo detected the DIMMs as 2-3-2-5 instead of 2-2-2-5? EDIT: Oh btw, I just tried both DIMMs together, and they pass! So to recap, both DIMM's at once, 2.8V = PASS "bad" DIMM by itself, 2.8V = FAIL "good" DIMM by itself, AUTO or 2.8V = PASS Why is that? BTW, memtest reports the memory speed for both dimms as 2049MB/s, whereas each DIMM by itself is 1366MB/s. Is dual channel DDR truly not double the speed? EDIT AGAIN: Oh scratch that -- ran a memtest overnight, and both DIMMs together fail after a bunch of tests. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted February 4, 2005 Corsair Employees Share Posted February 4, 2005 Why is that? BTW, memtest reports the memory speed for both dims as 2049MB/s, whereas each DIMM by itself is 1366MB/s. Is dual channel DDR truly not double the speed? A: Probably if you let it run for an extended time you would see more errors. But that might be some other issue not the memory; just that one module has a little less margin then the other. But let's get them replaced and go from there. BTW, do you know why the mobo detected the DIMMs as 2-3-2-5 instead of 2-2-2-5? A: Their bugs in the bios, after all the timings set with this module are not standard. Some MB's you just need to set the timings manually and in fact we suggest that with all of our modules. Link to comment Share on other sites More sharing options...
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