X41 and X41 Tablet, Max RAM = 2.5GBs, confirmed *PIC*
X41 tablet <-- Kingston 667MHz CL5 no issues, 2G visible.
Runs at 400MHz, 4-3-3-9 timings (same as before upgrade), though in spd the 2g module has 3-3-3-9 and according to cpu-z, first sodimm is disabled (which is obviously not true because of the 128 MB gma900 buffer, but that is chipsets matter what it reveals to programs).
Mem throughput has improved slightly in everest (read ~2450MB/s before, ~2600 after upgrade). Measured everest latency is 122ns, I expected a bit less
.
Runs at 400MHz, 4-3-3-9 timings (same as before upgrade), though in spd the 2g module has 3-3-3-9 and according to cpu-z, first sodimm is disabled (which is obviously not true because of the 128 MB gma900 buffer, but that is chipsets matter what it reveals to programs).
Mem throughput has improved slightly in everest (read ~2450MB/s before, ~2600 after upgrade). Measured everest latency is 122ns, I expected a bit less
lenovo X41t [ Pentium M 1.6 | 2 GB RAM | 915GM, GMA900 128 MB | 12" IPS tablet LCD | 16 GB CF SSD]
I've got heatpipe here, i've got heatpipe there 'n' I've got heatpipe everywhere...
I've got heatpipe here, i've got heatpipe there 'n' I've got heatpipe everywhere...
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samxmas888
- Posts: 6
- Joined: Tue Jan 29, 2008 1:19 pm
- Location: Brighton, UK
2.5GB installed but only 1.99GB visible
HI,
I've added the /3GB tag in the boot.ini file but the system is still not seeing 2.5GB. Having read this thread I can't work ut a fix for this. My BIOS is completely up to date 2.0.9 version.
Anyone have any fixes for this?
I've added the /3GB tag in the boot.ini file but the system is still not seeing 2.5GB. Having read this thread I can't work ut a fix for this. My BIOS is completely up to date 2.0.9 version.
Anyone have any fixes for this?
No contradiction here, there is 2.5G memory physically installed, but only 2G are addressable by OS through 915GM chipset.tueurkate wrote:System properties tells me 1.99 GB where as System Information has the following:
Total Physical Memory 2,560.00 MB
Available Physical Memory 1.27 GB
Total Virtual Memory 3.00 GB
Available Virtual Memory 2.96 GB
I'm not entirely sure what it means, but it appears contradictory.
http://www.intel.com/products/chipsets/915gm/index.htm wrote:Additionally Mobile Intel® 915GM Express chipset supports up to 2 GB of DDR2...
lenovo X41t [ Pentium M 1.6 | 2 GB RAM | 915GM, GMA900 128 MB | 12" IPS tablet LCD | 16 GB CF SSD]
I've got heatpipe here, i've got heatpipe there 'n' I've got heatpipe everywhere...
I've got heatpipe here, i've got heatpipe there 'n' I've got heatpipe everywhere...
-
itamar.beeri
- Posts: 1
- Joined: Thu Feb 14, 2008 9:46 am
- Location: Tel Aviv, Israel
http://www.intel.com/design/chipsets/em ... 855gme.htm
2GB chipset maximum.
2GB chipset maximum.
lenovo X41t [ Pentium M 1.6 | 2 GB RAM | 915GM, GMA900 128 MB | 12" IPS tablet LCD | 16 GB CF SSD]
I've got heatpipe here, i've got heatpipe there 'n' I've got heatpipe everywhere...
I've got heatpipe here, i've got heatpipe there 'n' I've got heatpipe everywhere...
Ok thanx. But is it not 1gb memstick which is the largest ddr Sodimm 200? Because my ibm har 512mb as standard, and I have supplied it with another 512mb. So if I were to incease my memory to the max, it would be 1500mb. Is this correct or is it also possible to switch the internal 512mb to 1024?weepy wrote:http://www.intel.com/design/chipsets/em ... 855gme.htm
2GB chipset maximum.
in X40, How about putting a SO-DIMM 2GB DDR2 PC2-5300 667MHZ KINGSTON 200pin + 512 on board = 2,5 gb memory total. Of curse the speed will clock down to 333 mhz but will it work? so that i will get 2,5 gb of total memory ?
[censored]:
DDR2 is NOT backwards compatible with DDR. The notch in DDR2 is in a different position than DDR...
[censored]:
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hurdadurda
- Posts: 12
- Joined: Tue Feb 26, 2008 4:46 pm
- Location: Vancouver Canada
1. My x41 tablet BIOS version is 2.0.6. Where did you guys found bios 2.0.9 ?
I've found this :
http://www-307.ibm.com/pc/support/site. ... 59206.html but apparenltly it is not for tables or not for mode 1866-6SU which is mine.
2. I've installed a 2 gig sodimm and the systems sees 1.99 gb and seems zippier. I activated /3GB and couldn't bot anymore and had to go to safe mode in order to undo the boot.ini change. Any thoughts on that ?
According to this :
http://www.microsoft.com/whdc/system/pl ... AEmem.mspx
/3GB only allows a process to use up to 3GB but doesn't forbid the OS from using all the 2GB of ram for multiple things so I guess it's all good.
p.s. The thing that seems to work better for me is the track point that always seemed to have a mind of this own before. Now it seems to work smoothly with no problem. maybe it's due to the electronics on the new mem chip and not it's capacity.
the
I've found this :
http://www-307.ibm.com/pc/support/site. ... 59206.html but apparenltly it is not for tables or not for mode 1866-6SU which is mine.
2. I've installed a 2 gig sodimm and the systems sees 1.99 gb and seems zippier. I activated /3GB and couldn't bot anymore and had to go to safe mode in order to undo the boot.ini change. Any thoughts on that ?
According to this :
http://www.microsoft.com/whdc/system/pl ... AEmem.mspx
/3GB only allows a process to use up to 3GB but doesn't forbid the OS from using all the 2GB of ram for multiple things so I guess it's all good.
p.s. The thing that seems to work better for me is the track point that always seemed to have a mind of this own before. Now it seems to work smoothly with no problem. maybe it's due to the electronics on the new mem chip and not it's capacity.
the
Here are some photos of a x41 tablet that shows:
1. ZIF-IDE converted hard drive(60gb, 4200rpm). I couldn't find the casing and the adapter/converter kit anywhere online. IMO it's a very well designed case. Anything that I decide not to take apart is well designed. Laughing
2. 2gb+512mb memory configuration: XP shows 2gb, Linux(2.6kernel) shows 2gb, MacOSX Leopard(10.5.1) shows 2.5gb.
3. Some misc. info. Ex. hard drive geometry info and benchmeark in both windows and linux, three antenna customization for abgn wireless card before I found out about the white list, the 2gb memory module I got from newegg, 915gm vga wiring hack to solve "blue screen hang" for MacOSX, etc.
Let me know if I should delete this since it's a crosspost.
teetee
1. ZIF-IDE converted hard drive(60gb, 4200rpm). I couldn't find the casing and the adapter/converter kit anywhere online. IMO it's a very well designed case. Anything that I decide not to take apart is well designed. Laughing
2. 2gb+512mb memory configuration: XP shows 2gb, Linux(2.6kernel) shows 2gb, MacOSX Leopard(10.5.1) shows 2.5gb.
3. Some misc. info. Ex. hard drive geometry info and benchmeark in both windows and linux, three antenna customization for abgn wireless card before I found out about the white list, the 2gb memory module I got from newegg, 915gm vga wiring hack to solve "blue screen hang" for MacOSX, etc.
Let me know if I should delete this since it's a crosspost.
teetee
So it means 2.5GB will work in MacOSX?teetee wrote:Here are some photos of a x41 tablet that shows:
1. ZIF-IDE converted hard drive(60gb, 4200rpm). I couldn't find the casing and the adapter/converter kit anywhere online. IMO it's a very well designed case. Anything that I decide not to take apart is well designed. Laughing
2. 2gb+512mb memory configuration: XP shows 2gb, Linux(2.6kernel) shows 2gb, MacOSX Leopard(10.5.1) shows 2.5gb.
3. Some misc. info. Ex. hard drive geometry info and benchmeark in both windows and linux, three antenna customization for abgn wireless card before I found out about the white list, the 2gb memory module I got from newegg, 915gm vga wiring hack to solve "blue screen hang" for MacOSX, etc.
Let me know if I should delete this since it's a crosspost.
teetee
T42 - Main
X41 - Wife is using
S30 - Just for collection
X41 - Wife is using
S30 - Just for collection
I Guess the reason for Mac OS can see all the 2.5GB is that it totally bypasses the BIOS, while it's the main reason for that we only see 2GB in Windows (or Linux). So... I think the answer is yes, one can see 2.5GB in Mac OS.
By the way, I don't think it's a good idea to install Mac OS on X41 just because you don't wanna waste that 512MB.
By the way, I don't think it's a good idea to install Mac OS on X41 just because you don't wanna waste that 512MB.
windows can "see" 2.5G too, but 2GB is actually what chipset will let you address, i dont believe, that MacOS will be able to make use of it, still there is the GMA buffer...
lenovo X41t [ Pentium M 1.6 | 2 GB RAM | 915GM, GMA900 128 MB | 12" IPS tablet LCD | 16 GB CF SSD]
I've got heatpipe here, i've got heatpipe there 'n' I've got heatpipe everywhere...
I've got heatpipe here, i've got heatpipe there 'n' I've got heatpipe everywhere...
Yes, windows (VISTA) can see 2.5GB as well, only if service pack 1 is installed. Today I tried to install VISTA services pack 1 on my X41 tablet, and amazingly after the installation, in the system (under control panel) it shows 2.5GB RAM (instead of 2038MB before I installed SP1). Although it's a really long process to install SP1 onto this X41, it turns out to be worth it because the machine is even more responsive. I don't think it's because the extra 512MB RAM is seen by windows, but because it implements the Readyboost more efficiently (I have 2GB SD card to enable readyboost). Anyway, I am not thinking of going back to XP tablet now because I don't like something about XP tablet. VISTA looks fine to me.
Re: X41 and X41 Tablet, Max RAM = 2.5GBs, confirmed
For those using Windows 7, I can report that today I successfully installed an:
- OCZ 2GB 677 Mhz SODIMM Module (OCZ2mV6672G) - price (Canadian $29) today @ infonec.com
into a:
- Lenovo X41 Tablet 1866-6SU
running Windows 7 release candidate and it works just fine. On the system screen it shows:
- Installed memory (RAM): 2.50 GB (1.99 GB usable)
Thanks to all on this forum for pointing me in the right direction. Previously I had 1.5 GB installed. It was worth $29 for me to get an extra 500 MB of RAM.
...Dale
- OCZ 2GB 677 Mhz SODIMM Module (OCZ2mV6672G) - price (Canadian $29) today @ infonec.com
into a:
- Lenovo X41 Tablet 1866-6SU
running Windows 7 release candidate and it works just fine. On the system screen it shows:
- Installed memory (RAM): 2.50 GB (1.99 GB usable)
Thanks to all on this forum for pointing me in the right direction. Previously I had 1.5 GB installed. It was worth $29 for me to get an extra 500 MB of RAM.
...Dale
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kerryh8er04
- Posts: 20
- Joined: Fri Mar 20, 2009 3:28 pm
- Location: Lubbock, TX
Re: X41 and X41 Tablet, Max RAM = 2.5GBs, confirmed

My X41T
Admin note: Added PIC warning to initial post in this thread. @kerryh8er04, thanks for keeping image < 50KB but when adding inline image(s) to a thread which was not started by you, you can't edit the thread's subject line to warn members about the enclosed graphics.
IBM T43p have had since 2007
IBM X41t have had since 2009
Lenovo X201 have had since 2010
IBM X41t have had since 2009
Lenovo X201 have had since 2010
Re: X41 and X41 Tablet, Max RAM = 2.5GBs, confirmed *PIC*
If one was to install a SD card (I have a 4GB one here somewhere) will Windows 7 be able to access this memory and use it for Readyboost purposes assuming my SD card supports it?
Shame I found this forum and thread after I ordered a 1GB stick for the tablet...
Oh well...
Shame I found this forum and thread after I ordered a 1GB stick for the tablet...
X220 Tablet
i7, 8GB RAM, 256 MX100 SSD, Windows 8.1 Pro
i7, 8GB RAM, 256 MX100 SSD, Windows 8.1 Pro
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sjthinkpader
- Senior ThinkPadder

- Posts: 2908
- Joined: Tue Jan 22, 2008 8:29 pm
- Location: San Jose, CA
Re: X41 and X41 Tablet, Max RAM = 2.5GBs, confirmed *PIC*
Win7 will test it for speed. It will reject it for ReadyBoost if the speed is too slow.
T60p 2623-DDU/UXGA IPS/ATI V5200
T60 2623-DCU/SXGA+ IPS/ATI X1400
T43p 2668-H8U/UXGA IPS/ATI V3200
R50p 1832-NU1/UXGA IPS/ATI FireGL T2
X61t 7762-B6U dual touch IPS/64GB SSD
X32 2673-BU6/32GB SSD
755CDV 9545-GBK Transmissive Projection LCD
T60 2623-DCU/SXGA+ IPS/ATI X1400
T43p 2668-H8U/UXGA IPS/ATI V3200
R50p 1832-NU1/UXGA IPS/ATI FireGL T2
X61t 7762-B6U dual touch IPS/64GB SSD
X32 2673-BU6/32GB SSD
755CDV 9545-GBK Transmissive Projection LCD
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loraxakagisto
- Posts: 6
- Joined: Sat Sep 26, 2009 11:07 pm
- Location: Rancho Cordova, CA
Re: X41 and X41 Tablet, Max RAM = 2.5GBs, confirmed *PIC*
hello, i recently bought this stick for my x41, Kingston HyperX 2048MB PC4200 DDR2 533MHz SODIMM and when i installed it, all i got was a beeping and a black-screen that could'nt go to bios screen even. any1 else get a similar problem when installing ty. im running xp 32-bit
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sjthinkpader
- Senior ThinkPadder

- Posts: 2908
- Joined: Tue Jan 22, 2008 8:29 pm
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Re: X41 and X41 Tablet, Max RAM = 2.5GBs, confirmed *PIC*
Sorry to hear that. I have used Kingston ValueRAM in T43/R52/X41 without problem. Try exchanging it with your seller.
T60p 2623-DDU/UXGA IPS/ATI V5200
T60 2623-DCU/SXGA+ IPS/ATI X1400
T43p 2668-H8U/UXGA IPS/ATI V3200
R50p 1832-NU1/UXGA IPS/ATI FireGL T2
X61t 7762-B6U dual touch IPS/64GB SSD
X32 2673-BU6/32GB SSD
755CDV 9545-GBK Transmissive Projection LCD
T60 2623-DCU/SXGA+ IPS/ATI X1400
T43p 2668-H8U/UXGA IPS/ATI V3200
R50p 1832-NU1/UXGA IPS/ATI FireGL T2
X61t 7762-B6U dual touch IPS/64GB SSD
X32 2673-BU6/32GB SSD
755CDV 9545-GBK Transmissive Projection LCD
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loraxakagisto
- Posts: 6
- Joined: Sat Sep 26, 2009 11:07 pm
- Location: Rancho Cordova, CA
Re: X41 and X41 Tablet, Max RAM = 2.5GBs, confirmed *PIC*
ya, i will be doin' that. is there a certain stick, that everyone has used and had success with ? im just looking to add to 2gb. thanks, sj for the feedback.
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sjthinkpader
- Senior ThinkPadder

- Posts: 2908
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Re: X41 and X41 Tablet, Max RAM = 2.5GBs, confirmed *PIC*
HyperX may be made for higher performance market and contain parameters in SPD that X41 doesn't like. I think ValueRAM has a blank SPD.
In my experience the only RAM that failed and had to be returned was Corsair. It was a big ordeal for me since I did a Windows update after increasing RAM and messed up the OS.
Neither Kingston and Corsair design and fab DRAM. Even if the chips are marked Corsair etc, they likely were sourced from a DRAM producer.
In my experience the only RAM that failed and had to be returned was Corsair. It was a big ordeal for me since I did a Windows update after increasing RAM and messed up the OS.
Neither Kingston and Corsair design and fab DRAM. Even if the chips are marked Corsair etc, they likely were sourced from a DRAM producer.
T60p 2623-DDU/UXGA IPS/ATI V5200
T60 2623-DCU/SXGA+ IPS/ATI X1400
T43p 2668-H8U/UXGA IPS/ATI V3200
R50p 1832-NU1/UXGA IPS/ATI FireGL T2
X61t 7762-B6U dual touch IPS/64GB SSD
X32 2673-BU6/32GB SSD
755CDV 9545-GBK Transmissive Projection LCD
T60 2623-DCU/SXGA+ IPS/ATI X1400
T43p 2668-H8U/UXGA IPS/ATI V3200
R50p 1832-NU1/UXGA IPS/ATI FireGL T2
X61t 7762-B6U dual touch IPS/64GB SSD
X32 2673-BU6/32GB SSD
755CDV 9545-GBK Transmissive Projection LCD
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loraxakagisto
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Re: X41 and X41 Tablet, Max RAM = 2.5GBs, confirmed *PIC*
awesome thank you, sj for all your help its very appericated 
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sjthinkpader
- Senior ThinkPadder

- Posts: 2908
- Joined: Tue Jan 22, 2008 8:29 pm
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Re: X41 and X41 Tablet, Max RAM = 2.5GBs, confirmed *PIC*
Sure, and a belated welcome to the forum.
T60p 2623-DDU/UXGA IPS/ATI V5200
T60 2623-DCU/SXGA+ IPS/ATI X1400
T43p 2668-H8U/UXGA IPS/ATI V3200
R50p 1832-NU1/UXGA IPS/ATI FireGL T2
X61t 7762-B6U dual touch IPS/64GB SSD
X32 2673-BU6/32GB SSD
755CDV 9545-GBK Transmissive Projection LCD
T60 2623-DCU/SXGA+ IPS/ATI X1400
T43p 2668-H8U/UXGA IPS/ATI V3200
R50p 1832-NU1/UXGA IPS/ATI FireGL T2
X61t 7762-B6U dual touch IPS/64GB SSD
X32 2673-BU6/32GB SSD
755CDV 9545-GBK Transmissive Projection LCD
-
loraxakagisto
- Posts: 6
- Joined: Sat Sep 26, 2009 11:07 pm
- Location: Rancho Cordova, CA
Re: X41 and X41 Tablet, Max RAM = 2.5GBs, confirmed *PIC*
hello again, i got this ram Kingston Value Ram 2GB KVR667D2K2SO (1 SODIMM) and it didnt work lol, i probaly should have asked, 1st if thats the right kind. it registered but then came to a blue screen stating that if i installed anything new to take it out, im hoping i just dont have the bios update or something thanks
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loraxakagisto
- Posts: 6
- Joined: Sat Sep 26, 2009 11:07 pm
- Location: Rancho Cordova, CA
Re: X41 and X41 Tablet, Max RAM = 2.5GBs, confirmed *PIC*
bios ver is 2.01 ty
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sjthinkpader
- Senior ThinkPadder

- Posts: 2908
- Joined: Tue Jan 22, 2008 8:29 pm
- Location: San Jose, CA
Re: X41 and X41 Tablet, Max RAM = 2.5GBs, confirmed *PIC*
This is a PC2-5300 and should work. Was it new in retail package or used one? Can you return it and get a replacement.
T60p 2623-DDU/UXGA IPS/ATI V5200
T60 2623-DCU/SXGA+ IPS/ATI X1400
T43p 2668-H8U/UXGA IPS/ATI V3200
R50p 1832-NU1/UXGA IPS/ATI FireGL T2
X61t 7762-B6U dual touch IPS/64GB SSD
X32 2673-BU6/32GB SSD
755CDV 9545-GBK Transmissive Projection LCD
T60 2623-DCU/SXGA+ IPS/ATI X1400
T43p 2668-H8U/UXGA IPS/ATI V3200
R50p 1832-NU1/UXGA IPS/ATI FireGL T2
X61t 7762-B6U dual touch IPS/64GB SSD
X32 2673-BU6/32GB SSD
755CDV 9545-GBK Transmissive Projection LCD
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loraxakagisto
- Posts: 6
- Joined: Sat Sep 26, 2009 11:07 pm
- Location: Rancho Cordova, CA
Re: X41 and X41 Tablet, Max RAM = 2.5GBs, confirmed *PIC*
the guy said it was new, it was in a static bag didn't look old or used. But i could be, so it wouldn't be from the bios would it? ty for all the help
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