funradio Posted December 29, 2007 Share Posted December 29, 2007 Hi all, I'm havin` some issues with my Corsair XMS2 PC2-6400. On the ASUS Maximus Formula SE, with an Intel C2D 2.20 GHz, the clock of the memory stays in 400 MHz even if set in BIOS @ 800 MHz (I must mention that I have 2 x 1GB kit). I tried Cpu-Z before setting it to 800 MHz in BIOS and after, and it gave me the same result... Memory Frequency 421.5 MHz (1:2). How can i set it to 800 MHz? Oh... and I also had some other problems with the memory: it gave me blue screens in Windoze and quite often the computer won't boot... it got stick to MEMCHECK or to some other process in BIOS. If I removed one of the cards, the system is stable and runs smooth, but I want to use them both. Last night, I put both memory cards on dual channel, and it runs smooth, with no problem whatsoever. Now.. I don't understand anythin`... how come 2 days ago, with the same settings and hardware it didn't run and now it runs as if some death knight follows it... I can't understand :-| If you need any more details about my system, feel free to follow this link: http://www.funradio-live.com/cpuz.htm Thanks in advance mates Link to comment Share on other sites More sharing options...
bigbuck08 Posted December 29, 2007 Share Posted December 29, 2007 Since your RAM is DDRII and is double sided, it will show up as 400MHz but you need to multiply whatever it shows by two. As for the other problem, please test each module individually with Memtest. How To Use Memtest. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted December 31, 2007 Corsair Employees Share Posted December 31, 2007 Can you tell me the actual part number of the memory you have? (should start with CM or TW). And BigBuck is right, CPU-Z and some other programs will list the actual memory frequency of the memory, instead of the DDR frequency. You can double this value to see what the memory is running at. 400MHz = DDR 800MHz, and 421.5MHz = DDR 843MHz. Link to comment Share on other sites More sharing options...
funradio Posted January 5, 2008 Author Share Posted January 5, 2008 Can you tell me the actual part number of the memory you have? (should start with CM or TW). sorry for the delay... the only s/n or p/n i found on them is CM2X1024-6400C5DHX Hope this is the one. Link to comment Share on other sites More sharing options...
funradio Posted January 6, 2008 Author Share Posted January 6, 2008 sorry for the delay... the only s/n or p/n i found on them is CM2X1024-6400C5DHX Hope this is the one. Please, disregard my questions and issues. I opted for changing the memmory modules since only one 800 MHz Corsair module is compatible with X38 Intel chipset. The QVL for memories is available on Asus' site and, after checking it, I opted for Kingston KHX6400D2ULK2/1G that has lower latencies then the CM2X1024-6400C5DHX and is fully compatible with the X38 chipset. Thanks for your support. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 7, 2008 Corsair Employees Share Posted January 7, 2008 With the 6400C5 part I would recommend setting the memory voltage to 1.9 volts and then test the modules one at a time with http://www.memtest.org. However it looks like you have exchanged the modules so I'm too late! If you still have the modules and they are failing memtest then let us know and we can have them replaced for you! Link to comment Share on other sites More sharing options...
funradio Posted January 7, 2008 Author Share Posted January 7, 2008 With the 6400C5 part I would recommend setting the memory voltage to 1.9 volts and then test the modules one at a time with http://www.memtest.org. However it looks like you have exchanged the modules so I'm too late! If you still have the modules and they are failing memtest then let us know and we can have them replaced for you! hi, i still have the modules. i set 1.9 V on memory slots but only when i oc'd the memory to 1066 MHz. I'll try this evening to set the voltage to 1.9 V. After setting the 1.9 V i should expect the system to be stable even if i install both dimms? thanks alot mate. Link to comment Share on other sites More sharing options...
funradio Posted January 7, 2008 Author Share Posted January 7, 2008 With the 6400C5 part I would recommend setting the memory voltage to 1.9 volts and then test the modules one at a time with http://www.memtest.org. However it looks like you have exchanged the modules so I'm too late! If you still have the modules and they are failing memtest then let us know and we can have them replaced for you! i only tested one of the modules @ 1.9 V and i got this error: Tst___Pars____Failing Address_______Good____Bad_____Err-Bits____Count Chan 6_____0__0382950FC - 898.3 MB_00200000_00000000__00200000____1 the problem is that i got the modules from USA and i live in Romania. how will i be able to change them? :( thanks in advance Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 7, 2008 Corsair Employees Share Posted January 7, 2008 hi, i still have the modules. i set 1.9 V on memory slots but only when i oc'd the memory to 1066 MHz. I'll try this evening to set the voltage to 1.9 V. After setting the 1.9 V i should expect the system to be stable even if i install both dimms? thanks alot mate. I really doubt these will run at 1066, just use the tested settings to test the modules. Link to comment Share on other sites More sharing options...
funradio Posted January 7, 2008 Author Share Posted January 7, 2008 I really doubt these will run at 1066, just use the tested settings to test the modules. i used the default clock settings at 1.9V as you told me to, for testing them with memtest and i got that result above Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 7, 2008 Corsair Employees Share Posted January 7, 2008 If you have one module that fails and the other one passes, then let's get them replaced, please use the On Line RMA Request Form and we will be happy to replace them. Link to comment Share on other sites More sharing options...
funradio Posted January 8, 2008 Author Share Posted January 8, 2008 If you have one module that fails and the other one passes, then let's get them replaced, please use the On Line RMA Request Form and we will be happy to replace them. Thank you very much for your help. How far can you say that this kit can be over clocked? Would it be possible to take it over 1000 MHz? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 8, 2008 Corsair Employees Share Posted January 8, 2008 I would probably be unlikely to be able to overclock these modules to 1000MHz, and each module is going to be able to overclock differently, so it's hard to say where they would max out at. You would just have to test them and see! Link to comment Share on other sites More sharing options...
funradio Posted January 8, 2008 Author Share Posted January 8, 2008 I would probably be unlikely to be able to overclock these modules to 1000MHz, and each module is going to be able to overclock differently, so it's hard to say where they would max out at. You would just have to test them and see! http://funradio-live.com/cpuz2.htm take a look. i reached 1020 MHz with one module @ 1.8V. Now, the weird thing is this: the module that gave me the error in memtest when set @ 800 MHz, 1.9V, at 1020 MHz, 1.8 V works perfect. The other module, that worked perfect when set @ 800 MHz, 1.9 V, at 1020 MHz, 1.8 V gave me 48 errors in memtest, in the first 3 minutes. That's a little weird, I might say. Anyway, if I set them both at 800 MHz, 1.9 V, the system freezes at CHECKMEM, in BIOS. I followed your instructions and completed the form to request the replacement of the modules and I'm now waiting for an answer. Thank you so much for your help. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 8, 2008 Corsair Employees Share Posted January 8, 2008 That may have been because of the over clock on the CPU go back and lower the multiplier on the CPU and see if the results change and with the CPU at default the memory frequency should be set to DDR667. Link to comment Share on other sites More sharing options...
funradio Posted January 8, 2008 Author Share Posted January 8, 2008 That may have been because of the over clock on the CPU go back and lower the multiplier on the CPU and see if the results change and with the CPU at default the memory frequency should be set to DDR667. the default shouldn't be ddr-800? that's when i set the processor on default. if i lower the multiplier, the fsb of memory lowers along with processor's. Anyway.. i was wondering... it says on your site that TWIN2X2048-6400C4DHX is fully compatible with my board... if changing the modules, would it be possible to exchange the TWIN2X2048-6400C5DHX kit with the one above? Thanks Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 8, 2008 Corsair Employees Share Posted January 8, 2008 There is no reason to change them, they are basically the same part and this is most likely just a limitation of the system configuration. The CPU will have a default FSB or 800 FSB and as such the memory should be set to DDR667. Link to comment Share on other sites More sharing options...
funradio Posted January 9, 2008 Author Share Posted January 9, 2008 There is no reason to change them, they are basically the same part and this is most likely just a limitation of the system configuration. The CPU will have a default FSB or 800 FSB and as such the memory should be set to DDR667. that's not the main reason for changing them... the reason is the result of memtest with all its errors, @ the default FSB 800 and voltage 1.9V. Also, the same errors result if the modules are tested at 1.8V. And if they really can be changed, then, if possible, let's change them with the compatible kit. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 9, 2008 Corsair Employees Share Posted January 9, 2008 You would have to talk to the reseller and see if they would let you return them for credit. We do not sell direct so we would only be able to replace them for what you send in. Sorry! Link to comment Share on other sites More sharing options...
funradio Posted January 9, 2008 Author Share Posted January 9, 2008 You would have to talk to the reseller and see if they would let you return them for credit. We do not sell direct so we would only be able to replace them for what you send in. Sorry! that's no problem.. even if you'll replace them with the same model will be far better then having faulty ones. thanks Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 9, 2008 Corsair Employees Share Posted January 9, 2008 NP Please let us know if you have any more questions. Link to comment Share on other sites More sharing options...
funradio Posted January 9, 2008 Author Share Posted January 9, 2008 NP Please let us know if you have any more questions. there's nothing else for the moment. thank you very much for your help. i'm waiting for an answer from your RMA people :) cheers mate and thanks again Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 10, 2008 Corsair Employees Share Posted January 10, 2008 NP I would give them till tomorrow at this time then let me know if you don't hear from them with the case number and I can check it for you. Link to comment Share on other sites More sharing options...
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