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#1
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RAM difference
I have an HP Pavilion ze5700 notebook with a whopping 256 MB RAM (and
onboard video)! Yes, HP for some reason thought this was enough RAM to run Windows XP! I'd like to add more RAM. I see no reason why I can't add 512 MB. However, I'm a bit confused. Please compare these two modules: http://www.crucial.com/store/mpartsp...52D384A5CA7304 and http://www.crucial.com/store/mpartsp...EC39EBA5CA7304 Other than the $15 price difference, it's hard to see what else is different. One is for a Pavilion and the other is for a Presario. But the only other difference I see is that the Presario one says "64Meg X 64." What does that mean? Is there a real difference? |
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#2
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RAM difference
Daave wrote:
I have an HP Pavilion ze5700 notebook with a whopping 256 MB RAM (and onboard video)! Yes, HP for some reason thought this was enough RAM to run Windows XP! I'd like to add more RAM. I see no reason why I can't add 512 MB. However, I'm a bit confused. Please compare these two modules: http://www.crucial.com/store/mpartsp...52D384A5CA7304 and http://www.crucial.com/store/mpartsp...EC39EBA5CA7304 Other than the $15 price difference, it's hard to see what else is different. One is for a Pavilion and the other is for a Presario. But the only other difference I see is that the Presario one says "64Meg X 64." What does that mean? Is there a real difference? The difference between the products, is these two lines. "Each memory slot can hold DDR PC2700 with a maximum of 512MB per slot" "Each memory slot can hold DDR PC2700 with a maximum of 1GB per slot" One computer supports a different chip density than the other. ******* The module manufacturers try not to give away density information. If they spec a custom module for a computer, there is never a datasheet. If they sell "generic" modules, where the customer takes the risk, they're willing to give datasheets for those. But then, you can't be sure they'll work (or whether they'll be "half-detected). http://www.valueram.com/datasheets/d...#DDR%20SODIMMs As for "dimensional" descriptors, 64M x 64 doesn't tell me anything (other than you're getting a 512MB module). If you told me the composition was "sixteen 32M x 8-bit chips), then you'd be telling me something. Memory comes in 64 bit wide arrays, so in that specification, I'd need eight 32Mx8 chips laid side by side, to make a 64 bit wide array. I could put an array on both sides of the module, making a dual rank unbuffered SODIMM. So (16) 32Mx8 is a fairly full description, while 64M x 64 is meaningless (because they likely already told you the module was 512MB). I can tell the (16) 32Mx8 is a dual rank module, which might be important to me (bus loading). http://www.valueram.com/datasheets/K...64SC25_512.pdf Paul |
#3
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RAM difference
On Oct 14, 3:19*am, Paul wrote:
Daave wrote: I have an HP Pavilion ze5700 notebook with a whopping 256 MB RAM (and onboard video)! Yes, HP for some reason thought this was enough RAM to run Windows XP! I'd like to add more RAM. I see no reason why I can't add 512 MB. However, I'm a bit confused. Please compare these two modules: http://www.crucial.com/store/mpartsp...52D384A5CA7304 and http://www.crucial.com/store/mpartsp...EC39EBA5CA7304 Other than the $15 price difference, it's hard to see what else is different. One is for a Pavilion and the other is for a Presario. But the only other difference I see is that the Presario one says "64Meg X 64." What does that mean? Is there a real difference? The difference between the products, is these two lines. * * "Each memory slot can hold DDR PC2700 with a maximum of 512MB per slot" * * "Each memory slot can hold DDR PC2700 with a maximum of 1GB per slot" One computer supports a different chip density than the other. ******* The module manufacturers try not to give away density information. If they spec a custom module for a computer, there is never a datasheet. If they sell "generic" modules, where the customer takes the risk, they're willing to give datasheets for those. But then, you can't be sure they'll work (or whether they'll be "half-detected). http://www.valueram.com/datasheets/d...#DDR%20SODIMMs As for "dimensional" descriptors, 64M x 64 doesn't tell me anything (other than you're getting a 512MB module). If you told me the composition was "sixteen 32M x 8-bit chips), then you'd be telling me something. Memory comes in 64 bit wide arrays, so in that specification, I'd need eight 32Mx8 chips laid side by side, to make a 64 bit wide array. I could put an array on both sides of the module, making a dual rank unbuffered SODIMM. So (16) 32Mx8 is a fairly full description, while 64M x 64 is meaningless (because they likely already told you the module was 512MB). I can tell the (16) 32Mx8 is a dual rank module, which might be important to me (bus loading). http://www.valueram.com/datasheets/K...64SC25_512.pdf * * Paul- Hide quoted text - - Show quoted text - Thanks, Paul. I just finished a chat session with someone from Crucial. This is what she said: "The Pavilion ze5700 Series must have 16 chip, low density installed." So, I guess I'll get the more expensive kind. But I wonder what would happen (hypothetically) if I installed the other (higher density) module instead. |
#4
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RAM difference
Daave wrote:
On Oct 14, 3:19 am, Paul wrote: Daave wrote: I have an HP Pavilion ze5700 notebook with a whopping 256 MB RAM (and onboard video)! Yes, HP for some reason thought this was enough RAM to run Windows XP! I'd like to add more RAM. I see no reason why I can't add 512 MB. However, I'm a bit confused. Please compare these two modules: http://www.crucial.com/store/mpartsp...52D384A5CA7304 and http://www.crucial.com/store/mpartsp...EC39EBA5CA7304 Other than the $15 price difference, it's hard to see what else is different. One is for a Pavilion and the other is for a Presario. But the only other difference I see is that the Presario one says "64Meg X 64." What does that mean? Is there a real difference? The difference between the products, is these two lines. "Each memory slot can hold DDR PC2700 with a maximum of 512MB per slot" "Each memory slot can hold DDR PC2700 with a maximum of 1GB per slot" One computer supports a different chip density than the other. ******* The module manufacturers try not to give away density information. If they spec a custom module for a computer, there is never a datasheet. If they sell "generic" modules, where the customer takes the risk, they're willing to give datasheets for those. But then, you can't be sure they'll work (or whether they'll be "half-detected). http://www.valueram.com/datasheets/d...#DDR%20SODIMMs As for "dimensional" descriptors, 64M x 64 doesn't tell me anything (other than you're getting a 512MB module). If you told me the composition was "sixteen 32M x 8-bit chips), then you'd be telling me something. Memory comes in 64 bit wide arrays, so in that specification, I'd need eight 32Mx8 chips laid side by side, to make a 64 bit wide array. I could put an array on both sides of the module, making a dual rank unbuffered SODIMM. So (16) 32Mx8 is a fairly full description, while 64M x 64 is meaningless (because they likely already told you the module was 512MB). I can tell the (16) 32Mx8 is a dual rank module, which might be important to me (bus loading). http://www.valueram.com/datasheets/K...64SC25_512.pdf Paul- Hide quoted text - - Show quoted text - Thanks, Paul. I just finished a chat session with someone from Crucial. This is what she said: "The Pavilion ze5700 Series must have 16 chip, low density installed." So, I guess I'll get the more expensive kind. But I wonder what would happen (hypothetically) if I installed the other (higher density) module instead. "Half-detected" is what would happen. The computer would run, but the 512MB module you added, would add only 256MB to the system. The rest of the memory would be inaccessible, because an address signal line is effectively missing from the Northbridge. Paul |
#5
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RAM difference
On Oct 14, 12:34*pm, Paul wrote:
Daave wrote: On Oct 14, 3:19 am, Paul wrote: Daave wrote: I have an HP Pavilion ze5700 notebook with a whopping 256 MB RAM (and onboard video)! Yes, HP for some reason thought this was enough RAM to run Windows XP! I'd like to add more RAM. I see no reason why I can't add 512 MB. However, I'm a bit confused. Please compare these two modules: http://www.crucial.com/store/mpartsp...52D384A5CA7304 and http://www.crucial.com/store/mpartsp...EC39EBA5CA7304 Other than the $15 price difference, it's hard to see what else is different. One is for a Pavilion and the other is for a Presario. But the only other difference I see is that the Presario one says "64Meg X 64." What does that mean? Is there a real difference? The difference between the products, is these two lines. * * "Each memory slot can hold DDR PC2700 with a maximum of 512MB per slot" * * "Each memory slot can hold DDR PC2700 with a maximum of 1GB per slot" One computer supports a different chip density than the other. ******* The module manufacturers try not to give away density information. If they spec a custom module for a computer, there is never a datasheet. If they sell "generic" modules, where the customer takes the risk, they're willing to give datasheets for those. But then, you can't be sure they'll work (or whether they'll be "half-detected). http://www.valueram.com/datasheets/d...#DDR%20SODIMMs As for "dimensional" descriptors, 64M x 64 doesn't tell me anything (other than you're getting a 512MB module). If you told me the composition was "sixteen 32M x 8-bit chips), then you'd be telling me something. Memory comes in 64 bit wide arrays, so in that specification, I'd need eight 32Mx8 chips laid side by side, to make a 64 bit wide array. I could put an array on both sides of the module, making a dual rank unbuffered SODIMM. So (16) 32Mx8 is a fairly full description, while 64M x 64 is meaningless (because they likely already told you the module was 512MB). I can tell the (16) 32Mx8 is a dual rank module, which might be important to me (bus loading). http://www.valueram.com/datasheets/K...64SC25_512.pdf * * Paul- Hide quoted text - - Show quoted text - Thanks, Paul. I just finished a chat session with someone from Crucial. This is what she said: "The Pavilion ze5700 Series must have 16 chip, low density installed." So, I guess I'll get the more expensive kind. But I wonder what would happen (hypothetically) if I installed the other (higher density) module instead. "Half-detected" is what would happen. The computer would run, but the 512MB module you added, would add only 256MB to the system. The rest of the memory would be inaccessible, because an address signal line is effectively missing from the Northbridge. * * Paul- Hide quoted text - - Show quoted text - Thanks, Paul. |
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