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#1
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256Mb EDO DIMMs - Are they faster than lower capacity ones?
My ever expanding Proliant 3000 now has a gig of memory (still running
Memtest86 on it) and the transfer rate is about 7Mb/sec faster than the motley selection of 32Mb DIMMs I had in it before. Are the 256Mb DIMMs faster? I'm assuming that if I mix any of the old RAM back in the transfer speed will drop to the lowest common denominator? Quite chuffed really as I'm sad to say I've never had a machine with a gig of RAM before. Even my XP2500+ desktop runs quite happy on 512Mb... Regards, Jason. --- Replace nntp with my name to reply. N0 5pAm H3r3: Include this tagline to pass my spam filter. |
#2
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Nutcracker seems to have a real knack for determining the specs, of
discreet Compaq components, using only the nine digit Compaq part number (xxxxxx-xxx). See if you can post these numbers from the old and new sticks, and maybe he can tell you the speed difference. You are right, though...the system will only run as fast as the slowest component. To be honest, I have never really tested my systems for RAM speed. What is this "Memtest86" that you are referring to? Tell me where to get it and I will try to give you some speed comparison with my machines. Jeff |
#3
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On 16 Aug 2005 12:00:43 -0700, "Jeffrey Alsip"
wrote: Nutcracker seems to have a real knack for determining the specs, of discreet Compaq components, using only the nine digit Compaq part number (xxxxxx-xxx). See if you can post these numbers from the old and new sticks, and maybe he can tell you the speed difference. You are right, though...the system will only run as fast as the slowest component. To be honest, I have never really tested my systems for RAM speed. What is this "Memtest86" that you are referring to? Tell me where to get it and I will try to give you some speed comparison with my machines. www.memtest86.com a handy utility for checking all those dusty old SIMMs and DIMMs that turn up in the bottom of boxes. I've got the boot CD which comes in handy for testing RAM on all sorts of machines. I actually downloaded it because I thought I had a memory fault on my desktop but the RAM has checked out OK. It appears it is just 'that time again' where XP builds up a layer of crud in inappropriate places and starts going flakey. I'm very seriously considering going to Linux for my desktop and just keeping my old laptop running XP for client support purposes. Also I'd have nothing to sync my iPAQ with if I went entirely to Linux. Just to keep on topic, my Proliant 3000 is going to take a l-o-n-g time to run memtest on 1Gb of EDO, it's taken 2hrs to get to 45%. I hate to think how long it will take to check 3Gb. It's does however reassuringly say that all of the 1024Mb is cached so the PII 333MHz is working fine on this old 66MHz mainboard. Regards, Jason. --- Replace nntp with my name to reply. N0 5pAm H3r3: Include this tagline to pass my spam filter. |
#4
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Jason,
I have been trying to send you email, but can't seem to navigate your security. Try sending me one. My security is less strict. Jeff |
#5
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"Jeffrey Alsip" wrote in message oups.com... Nutcracker seems to have a real knack for determining the specs, of discreet Compaq components, using only the nine digit Compaq part number (xxxxxx-xxx). See if you can post these numbers from the old and new sticks, and maybe he can tell you the speed difference. You are right, though...the system will only run as fast as the slowest component. To be honest, I have never really tested my systems for RAM speed. What is this "Memtest86" that you are referring to? Tell me where to get it and I will try to give you some speed comparison with my machines. Jeff What does your memory population look like? There are 4 slots on the systemboard, and 8 slots in the riser card. There is a preferred population order in which to add sticks to the system to gain maximum memory I/O. This is due to the bank interleaving. and I believe that the proper order is on the big huge sticker under the cover of the server. Lots of interesting tidbits there. The easiest way to determine if there are any real differences in the chips is to look at them. The only discernable difference will be if the end in a -5 or a -6. The -5 will be a 50ns refresh rate, while the -6 will be 60ns. I dont know if that could truley account for a 7MB/s difference in memory I/O speeds. Honestly, that is negligable when dealing with a system that "should" be doing around 380MB/s, maybe a touch more. Thats about all i can think of right now. Let me know if you have any other questions. - LC |
#6
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On Wed, 17 Aug 2005 09:08:20 -0500, "NuTCrAcKeR"
wrote: "Jeffrey Alsip" wrote in message roups.com... Nutcracker seems to have a real knack for determining the specs, of discreet Compaq components, using only the nine digit Compaq part number (xxxxxx-xxx). See if you can post these numbers from the old and new sticks, and maybe he can tell you the speed difference. You are right, though...the system will only run as fast as the slowest component. To be honest, I have never really tested my systems for RAM speed. What is this "Memtest86" that you are referring to? Tell me where to get it and I will try to give you some speed comparison with my machines. Jeff What does your memory population look like? There are 4 slots on the systemboard, and 8 slots in the riser card. There is a preferred population order in which to add sticks to the system to gain maximum memory I/O. This is due to the bank interleaving. and I believe that the proper order is on the big huge sticker under the cover of the server. Lots of interesting tidbits there. The easiest way to determine if there are any real differences in the chips is to look at them. The only discernable difference will be if the end in a -5 or a -6. The -5 will be a 50ns refresh rate, while the -6 will be 60ns. I dont know if that could truley account for a 7MB/s difference in memory I/O speeds. Honestly, that is negligable when dealing with a system that "should" be doing around 380MB/s, maybe a touch more. Thats about all i can think of right now. Let me know if you have any other questions. Having had a quick look in the server it would appear they are 50ns DIMMs and all of the old ones are 60ns. The new DIMMs are installed in accordance with the guide on the case (2 in the mainboard and 2 in the daughter board). Previously I had all 12 slots filled with 32Mb DIMMs so I now have 12 x 32Mb DIMMs, incidentally what memory does the cache on the Smart SL2 controller take? Mine is reporting 6Mb memory which I assume is 2Mb onboard and 4Mb in the slot. I'm assuming this isn't an EDO DIMM by any chance? Regards, Jason. --- Replace nntp with my name to reply. N0 5pAm H3r3: Include this tagline to pass my spam filter. |
#7
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Having had a quick look in the server it would appear they are 50ns DIMMs and all of the old ones are 60ns. The new DIMMs are installed in accordance with the guide on the case (2 in the mainboard and 2 in the daughter board). Previously I had all 12 slots filled with 32Mb DIMMs so I now have 12 x 32Mb DIMMs, incidentally what memory does the cache on the Smart SL2 controller take? Mine is reporting 6Mb memory which I assume is 2Mb onboard and 4Mb in the slot. I'm assuming this isn't an EDO DIMM by any chance? Regards, Jason. --- Hello Jason, dont bother trying to change out the memory stick on the 2SL. I once tried to put a 32M stick in there, and the card was still able to recognise only 6MB. Im afraid you are stuck with 6MB SA (smart array) controllers are getting so cheap now, you might want to just pickup a 3200 for $15. That way you can have up to 56M of cache which is battery backed. which means that you can turn on acceleration, which isnt really available on the 2SL because it lacks the battery backed write cache. - LC |
#8
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Nutcracker,
I try to use the 3200 Controllers whenever possible...but my stock is limited. I have several of these models: 221, 2SL, and 2DH. I was wondering if you could give me (and maybe all of us) a breakdown of what specifications each of these boards have. Many of us seem to run into brick walls when searching the Compaq site for info. You seem to have these facts readily at hand. Jeff |
#9
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"Jeffrey Alsip" wrote in message ups.com... Nutcracker, I try to use the 3200 Controllers whenever possible...but my stock is limited. I have several of these models: 221, 2SL, and 2DH. I was wondering if you could give me (and maybe all of us) a breakdown of what specifications each of these boards have. Many of us seem to run into brick walls when searching the Compaq site for info. You seem to have these facts readily at hand. Jeff Sure, Jeff. Give ma a little time to build a matrix for easy comparison. I will post it here in a couple of days. - LC |
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