Mitch007 Posted February 15, 2005 Share Posted February 15, 2005 Hi, I have as sig indicates a MSI645 Ultra mobo, designed around 333DDR. I had instatted 2*256 LLPT3200 memory. Currently the P42.4 i have is clocked at 2.7 wit FSB at 117Mhz. This sets memory at approx 390Mhz and was able to select:- Cas latency 2T Fast memory timings. (optoins are Safe, Normal, Fast Turbo, Ultra) 1T, installed a 512 stck XLPT Corsair memory, and can only set Cas latency 2.5 Safe Delay 1T (ie 2T timing). Why did I have to back off so much when new stick is supposed to be even faster than my 2*256? And I get stutter in half life! Just to be clear all stick are XMS grade.... Link to comment Share on other sites More sharing options...
Yellowbeard Posted February 15, 2005 Share Posted February 15, 2005 Sorry, I'm not clear here. Did you add the XL stick to the system to have 3 sticks of RAM now? Or, are you running the XL stick alone? If you took the 3 stick route here, that is your problem. Mike. Link to comment Share on other sites More sharing options...
Mitch007 Posted February 15, 2005 Author Share Posted February 15, 2005 Sorry, I'm not clear here. Did you add the XL stick to the system to have 3 sticks of RAM now? Or, are you running the XL stick alone? If you took the 3 stick route here, that is your problem. Mike. XLPT is added to rig to total 1 gig ramm 2x256 in slots 1 and 2 Slot 3 holds the 512 module... Just confused why I had to pull the timings down so far, even though the 512 supports more aggressive timing than LLPT stick. with 512 in slot 1 on it's OWN, I get Turbo timing, and as aggressive cas latency etc as with the 2*256 sticks... Thanks, Link to comment Share on other sites More sharing options...
Yellowbeard Posted February 15, 2005 Share Posted February 15, 2005 There are 2 primary reasons you had to lower timings. 1. You have mixed 2 distinctly different types of RAM. Many people that have done this cannot even get their system to boot. You may also get some instability. 2. You have all 3 of your RAM slots loaded. This placed a tremendous load on the MOBO's chipset. Due to this load, the latencies must be reduced so that the MOBO can manage all of those different ranks of RAM. More sticks = more latency. I think you'll find that the PC3200XL stick will run great by itself in the MOBO. If you need 1gb of RAM, there are some other configurations that would work much better. However, since you have a dual channel MOBO it will be difficult to get the low latencies you want and have a full 1gb of RAM. Mike. Link to comment Share on other sites More sharing options...
Mitch007 Posted February 15, 2005 Author Share Posted February 15, 2005 specmike, good point about the loading on the chip-set, I was wondering if this would be a possibility, and you have confirmed my fears.. I think I need to but muy losses, sell current stuff on ebay and buy a couple matched 512 stick and start again! bummer, more money down the toilet! Link to comment Share on other sites More sharing options...
Yellowbeard Posted February 15, 2005 Share Posted February 15, 2005 bummer, more money down the toilet! Unfortunately, this is often the case as technology progresses. I've done the same with a variety of components. If was in your exact situation there are 2 good choices. You could sell the 2 x 256mb sticks and try to get another XL stick. BUT!, there are 2 revisions of XL available. The revision is the last part of the serial or part # on your holographic sticker on the heat spreader. It should say something like ver 1.1 . So, make sure that you get a matched stick or your problems may continue. And, ideally, I like the idea of a single 1gb stick of PC3200C2. The latencies per stick are not as low as your XL or your LL but, you can get 1gb with only 1 stick which is ideal on a single channel MOBO. So, it all balances out and has less overall chipset load. You could get the 1gb PC3200C2 and sell everything you have now, or save some for a future build etc. Good luck, Mike. Link to comment Share on other sites More sharing options...
Mitch007 Posted February 17, 2005 Author Share Posted February 17, 2005 And, ideally, I like the idea of a single 1gb stick of PC3200C2. The latencies per stick are not as low as your XL or your LL but, you can get 1gb with only 1 stick which is ideal on a single channel MOBO. So, it all balances out and has less overall chipset load. You could get the 1gb PC3200C2 and sell everything you have now, or save some for a future build etc. Good luck, Mike. The 1 gig stick option does sounds good, this is the only option to avoide non matched pair issues. I'll see if i can dump the rest through work or ebay. The mobo I have is a little long in the tooth, and i am trying to squeeze every ounce of performance out of it and my P4 2.4.... Link to comment Share on other sites More sharing options...
Mitch007 Posted February 17, 2005 Author Share Posted February 17, 2005 The 1 gig stick option does sounds good, this is the only option to avoide non matched pair issues. I'll see if i can dump the rest through work or ebay. The mobo I have is a little long in the tooth, and i am trying to squeeze every ounce of performance out of it and my P4 2.4.... What would you reccomend, i can get the Mobo ut to 118FSB equal to about 392Mhz memory speed, although it's stricktly a 333board Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted February 17, 2005 Corsair Employees Share Posted February 17, 2005 With this MB and that CPU the memory frequency should be set to DDR266. DDR333 may be to fast for the memory if you are trying to over clock the CPU. It will cause a bottleneck in the chipset and may prematurely generate errors not from the memory. Link to comment Share on other sites More sharing options...
Mitch007 Posted February 21, 2005 Author Share Posted February 21, 2005 With this MB and that CPU the memory frequency should be set to DDR266. DDR333 may be to fast for the memory if you are trying to over clock the CPU. It will cause a bottleneck in the chipset and may prematurely generate errors not from the memory. Interesting, I'll pair back the memory/CPU ratio, to ensure it does not exceed 333 with overclocked CPU, I'll also try and rcover some more aggressive memory timing at the same time... All three together>... But saying that, when I ran 2x256 on there own, i was OK! so still somewhat confused on why I is having a problem, and leavs load on CPU as the primary culpret, I will try, 1 x 256 and 1 x 512 to see if i can recover my clock ttimings back to the more aggressive i was seeing with the 2 x 256's i origionally had....trial and error.... I thing I gonna by another 512 stick XLPT, and sell my 2x256LLPT's Link to comment Share on other sites More sharing options...
Mitch007 Posted February 22, 2005 Author Share Posted February 22, 2005 Interesting, I'll pair back the memory/CPU ratio, to ensure it does not exceed 333 with overclocked CPU, I'll also try and rcover some more aggressive memory timing at the same time... All three together>... But saying that, when I ran 2x256 on there own, i was OK! so still somewhat confused on why I is having a problem, and leavs load on CPU as the primary culpret, I will try, 1 x 256 and 1 x 512 to see if i can recover my clock ttimings back to the more aggressive i was seeing with the 2 x 256's i origionally had....trial and error.... I thing I gonna by another 512 stick XLPT, and sell my 2x256LLPT's tried the 512 on it's own, managed near most aggressive timings mobo will support, Turbo, and see 2, 2, 2, 7, 10 on CPUZ memory tab/window, that;'s with 116FSB, overclock on CPU, memory running at 386 approx, and CPU at 2.808Gig, so if I order another 512 stick with same revision, will I get any more problems Link to comment Share on other sites More sharing options...
Yellowbeard Posted February 22, 2005 Share Posted February 22, 2005 tried the 512 on it's own, managed near most aggressive timings mobo will support, Turbo, and see 2, 2, 2, 7, 10 on CPUZ memory tab/window, that;'s with 116FSB, overclock on CPU, memory running at 386 approx, and CPU at 2.808Gig, so if I order another 512 stick with same revision, will I get any more problems Personally, I see 2 potential issues with adding the 2nd stick. 1st, turn off the turbo. That setting will interfere with your manual settings and could prevent you from reaching your max OC. Turbo could also prevent you from getting the best latencies from your RAM as it will interfere with your manually set timings. 2nd, you "might" have to lower the latencies with 2 sticks. But, there is only 1 way to tell unless you can get better info from RAM GUY or MSI. Mike. Link to comment Share on other sites More sharing options...
Mitch007 Posted February 23, 2005 Author Share Posted February 23, 2005 Personally, I see 2 potential issues with adding the 2nd stick. 1st, turn off the turbo. That setting will interfere with your manual settings and could prevent you from reaching your max OC. Turbo could also prevent you from getting the best latencies from your RAM as it will interfere with your manually set timings. 2nd, you "might" have to lower the latencies with 2 sticks. But, there is only 1 way to tell unless you can get better info from RAM GUY or MSI. Mike. Thanks for the feedback, i guess I'll stick with the 512 for now. The tighter latencies helped significantly on the benchmarks, running in Turbo, adding 5003dmark01 from 13300 to 13800, I know not a lot in reality, but from this system it's good. Boot seems quicker as is the stability. Link to comment Share on other sites More sharing options...
meineke536 Posted June 21, 2010 Share Posted June 21, 2010 i installed 2 gb of memory, how do i check that it has been install correctly Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted June 22, 2010 Corsair Employees Share Posted June 22, 2010 You should be able to see how much memory is in the bios or you can also check under system properties in windows. Link to comment Share on other sites More sharing options...
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