HP Memory Question
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From: JP on 26 Jan 2010 19:01 Grandpa has a HP Pavilion a705W (Part # PJ562AA) desktop machine that has room for a memory upgrade. The manufacturer's info in reference to the memory capabilities is as follows: Memory Component Attributes Initial Memory Installed 256 MB Maximum allowed 1 GB (2 x 512 MB) Speed supported PC2700 MB/sec (messages at PC2100) Type 184 pin, DDR1-333 SDRAM DIMM slots Two Presently, in the two slots there are two PC3200 sticks installed, one 256 MB stick and one 512 MB stick. The 256 MB stick is original and the 512 stick was added by a computer store. I have two PC2100 512 MB sticks from another machine that I can use in this machine. Based on the manufacturer's info above, messages at PC2100, what would be the best configuration to use in the two slots? Recap: I have two PC 2100 512 MB 184 pin sticks, one PC 3200 512 MB 184 pin stick and one PC 3200 256 MB 184 pin stick. I don't understand when HP states: "Speed supported: PC 2700 MB/sec (messages at PC 2100)." Am I better off with one 512 PC3200 stick and one 512 PC2100 stick or two 512 PC2100 sticks or a different combination? Also, Crucial states that I can install up to 2 GB of memory..is this correct? Suggestions? Paul will be able to answer this !!!
From: Ian D on 26 Jan 2010 19:42 "JP" <by363(a)ncf.ca> wrote in message news:hjnvpf$g84$1(a)theodyn.ncf.ca... > Grandpa has a HP Pavilion a705W (Part # PJ562AA) desktop machine that has > room for a memory upgrade. The manufacturer's info in reference to the > memory capabilities is as follows: > > Memory Component Attributes > Initial Memory Installed 256 MB > Maximum allowed 1 GB (2 x 512 MB) > Speed supported PC2700 MB/sec (messages at PC2100) > Type 184 pin, DDR1-333 SDRAM > DIMM slots Two > > Presently, in the two slots there are two PC3200 sticks installed, one 256 > MB stick and one 512 MB stick. The 256 MB stick is original and the 512 > stick was added by a computer store. > > I have two PC2100 512 MB sticks from another machine that I can use in > this machine. Based on the manufacturer's info above, messages at PC2100, > what would be the best configuration to use in the two slots? > > Recap: I have two PC 2100 512 MB 184 pin sticks, one PC 3200 512 MB 184 > pin stick and one PC 3200 256 MB 184 pin stick. > > I don't understand when HP states: "Speed supported: PC 2700 MB/sec > (messages at PC 2100)." > > Am I better off with one 512 PC3200 stick and one 512 PC2100 stick or two > 512 PC2100 sticks or a different combination? > > Also, Crucial states that I can install up to 2 GB of memory..is this > correct? > > Suggestions? > > Paul will be able to answer this !!! > > > If you looked at the motherboard specs, on the HP site, you would have seen this: - Two 184-pin DDR DIMM - Maximum memory size is up to 2GB, 1GB per slot. - HP recommends a maximum memory of 1GB, 512MB per slot. - Supports PC2100 or PC2700 unbuffered non-ECC The motherboard supports 2GB, but HP recommends 1GB. This could be due to power supply, or other constraints. Your best bet is to put in the two 512MB PC2100 sticks. If you mix PC3200 and PC2100, it will still only run at PC2100 speed. If the HP is running XP, 1GB is sufficient.
From: Paul on 26 Jan 2010 22:29 JP wrote: > Grandpa has a HP Pavilion a705W (Part # PJ562AA) desktop machine that > has room for a memory upgrade. The manufacturer's info in reference to > the memory capabilities is as follows: > > Memory Component Attributes > Initial Memory Installed 256 MB > Maximum allowed 1 GB (2 x 512 MB) > Speed supported PC2700 MB/sec (messages at PC2100) > Type 184 pin, DDR1-333 SDRAM > DIMM slots Two > > Presently, in the two slots there are two PC3200 sticks installed, one > 256 MB stick and one 512 MB stick. The 256 MB stick is original and the > 512 stick was added by a computer store. > > I have two PC2100 512 MB sticks from another machine that I can use in > this machine. Based on the manufacturer's info above, messages at > PC2100, what would be the best configuration to use in the two slots? > > Recap: I have two PC 2100 512 MB 184 pin sticks, one PC 3200 512 MB 184 > pin stick and one PC 3200 256 MB 184 pin stick. > > I don't understand when HP states: "Speed supported: PC 2700 MB/sec > (messages at PC 2100)." > > Am I better off with one 512 PC3200 stick and one 512 PC2100 stick or > two 512 PC2100 sticks or a different combination? > > Also, Crucial states that I can install up to 2 GB of memory..is this > correct? > > Suggestions? > > Paul will be able to answer this !!! > The specs start here. The Northbridge is an 845GV. http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00255589&cc=us&dlc=en&lc=en&jumpid=reg_R1002_USEN To answer the question, I used a document I have on disk. Intel made a motherboard based on 845GV, so I can use that as a source of advice. http://downloadmirror.intel.com/15210/eng/D845GVSR_TechProdSpec.pdf "If the processor's system bus frequency is... You can use this type of DIMM... 533 MHz DDR333 or DDR266 400 MHz DDR266 or DDR200" To start with, your PC3200 sticks support DDR400, DDR333, DDR266, DDR200. The above table predicts the hardware could support DDR333, so you won't be getting DDR400 rates. If the BIOS is poorly written, you may even end up at DDR266. The HP specs say the computer shipped with a Celeron 340 2.93 GHz/FSB533 processor. That would correspond to the first line in the table. A PC3200, PC2700, or PC2100 DIMM would work in the machine. If you mix speeds, the slowest DIMM dictates what speeds will be used. If you mix a PC3200 (DDR400) and a PC2100 (DDR266), then the slowest speed of DDR266 would be used. If you install two PC3200 sticks, the fastest they'll go is DDR333, due to the chipset limitation. By installing the PC2100 (DDR266) DIMM, you're limiting the peak memory bandwidth to 2100MB/sec (266*8bytes). If a DDR333 DIMM was present and run at full speed, you'd get up to 2700MB/sec bandwidth. So that is one consequence of your switch to slower DIMMs. If the motherboard BIOS had controls to change the memory speed, you could experiment with the two options while you still had the PC3200 256+512 modules, and see how much effect operating at DDR333 or DDR266 has. But the motherboard BIOS setup screens may lack such a setting. You can verify the settings the computer has currently chosen to use, with CPUZ. This program might allow you to verify it really "messages at DDR266". Run the program and check the memory tab. http://www.cpuid.com/cpuz.php The Intel board with the 845GV on it, also seems to support 2x1GB. If you buy 1GB DDR sticks, you'd want them to be low density sticks. Sellers on Ebay may mention on their web page, that they're selling high density sticks. http://www.crucial.com/store/ListParts.aspx?model=D845GVSR To see what a low density DIMM looks like, this is a Kingston datasheet for a module used with the D845GVSR. The module uses (16) 64Mx8 memory chips. An Ebay seller would try to sell you (16) 128Mx4 memory chips on a module, and that is the high density stuff. At least with Kingston, in this example, you can see what you're getting. Detailed construction info for RAM, isn't always provided. http://www.valueram.com/datasheets/KVR333X64C25_1G.pdf The data HP lists for the Pavilion a705W, was accurate at the time the information was released. But now that 1GB modules can be purchased, the HP table needs to be updated. Even Kingston lists 2x1GB. http://www.ec.kingston.com/ecom/configurator_new/modelsinfo.asp?SysID=21604 I'd have to ask what Grandpa uses the computer for, before I'd shop for 2x1GB of new memory. I've run machines with 1GB total and 2GB total, and been happy with both. The 2GB configuration allows me to run a 1GB virtual machine, using MS VPC2007, while managing to do other things. But Grandpa might not be running such a configuration. For email, Word, or web surfing, it is possible 1GB would meet most daily needs. Even 768MB wouldn't be that painful. I've worked with a WinXP 512MB machine of a relative, and that "pinched" a bit and wasn't as snappy as it could have been. So I'd probably like just a little bit more than 512MB. And 768MB might have met that criterion. The Task Manager "Commit Charge" information, would allow you to observe the peak memory usage during a working day. For example, my peak today was 1.85GB, since I was running the 1GB virtual machine for part of the day. If Grandpa was using Photoshop, that benefits from more RAM. If you don't have enough RAM, the computer uses the disk for temporary space. And the disk is much much slower than RAM would be. So that might be an excuse for a RAM upgrade. Paul
From: JP on 26 Jan 2010 23:40 Thanks Paul, as always, and Ian! "Paul" <nospam(a)needed.com> wrote in message news:hjobvo$4lt$1(a)news.eternal-september.org... > JP wrote: >> Grandpa has a HP Pavilion a705W (Part # PJ562AA) desktop machine that has >> room for a memory upgrade. The manufacturer's info in reference to the >> memory capabilities is as follows: >> >> Memory Component Attributes >> Initial Memory Installed 256 MB >> Maximum allowed 1 GB (2 x 512 MB) >> Speed supported PC2700 MB/sec (messages at PC2100) >> Type 184 pin, DDR1-333 SDRAM >> DIMM slots Two >> >> Presently, in the two slots there are two PC3200 sticks installed, one >> 256 MB stick and one 512 MB stick. The 256 MB stick is original and the >> 512 stick was added by a computer store. >> >> I have two PC2100 512 MB sticks from another machine that I can use in >> this machine. Based on the manufacturer's info above, messages at PC2100, >> what would be the best configuration to use in the two slots? >> >> Recap: I have two PC 2100 512 MB 184 pin sticks, one PC 3200 512 MB 184 >> pin stick and one PC 3200 256 MB 184 pin stick. >> >> I don't understand when HP states: "Speed supported: PC 2700 MB/sec >> (messages at PC 2100)." >> >> Am I better off with one 512 PC3200 stick and one 512 PC2100 stick or two >> 512 PC2100 sticks or a different combination? >> >> Also, Crucial states that I can install up to 2 GB of memory..is this >> correct? >> >> Suggestions? >> >> Paul will be able to answer this !!! >> > > The specs start here. The Northbridge is an 845GV. > > http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00255589&cc=us&dlc=en&lc=en&jumpid=reg_R1002_USEN > > To answer the question, I used a document I have on disk. Intel made > a motherboard based on 845GV, so I can use that as a source of advice. > > http://downloadmirror.intel.com/15210/eng/D845GVSR_TechProdSpec.pdf > > "If the processor's system bus frequency is... You can use this type > of DIMM... > > 533 MHz DDR333 or DDR266 > > 400 MHz DDR266 or DDR200" > > To start with, your PC3200 sticks support DDR400, DDR333, DDR266, DDR200. > The > above table predicts the hardware could support DDR333, so you won't > be getting DDR400 rates. If the BIOS is poorly written, you > may even end up at DDR266. > > The HP specs say the computer shipped with a Celeron 340 2.93 GHz/FSB533 > processor. > That would correspond to the first line in the table. A PC3200, PC2700, or > PC2100 > DIMM would work in the machine. If you mix speeds, the slowest DIMM > dictates what > speeds will be used. If you mix a PC3200 (DDR400) and a PC2100 (DDR266), > then > the slowest speed of DDR266 would be used. If you install two PC3200 > sticks, the > fastest they'll go is DDR333, due to the chipset limitation. > > By installing the PC2100 (DDR266) DIMM, you're limiting the peak memory > bandwidth to 2100MB/sec (266*8bytes). If a DDR333 DIMM was present and > run at full speed, you'd get up to 2700MB/sec bandwidth. So that is one > consequence of your switch to slower DIMMs. If the motherboard > BIOS had controls to change the memory speed, you could experiment > with the two options while you still had the PC3200 256+512 modules, > and see how much effect operating at DDR333 or DDR266 has. > But the motherboard BIOS setup screens may lack such a setting. > > You can verify the settings the computer has currently chosen to use, > with CPUZ. This program might allow you to verify it really > "messages at DDR266". Run the program and check the memory tab. > > http://www.cpuid.com/cpuz.php > > The Intel board with the 845GV on it, also seems to support 2x1GB. > If you buy 1GB DDR sticks, you'd want them to be low density sticks. > Sellers on Ebay may mention on their web page, that they're selling > high density sticks. > > http://www.crucial.com/store/ListParts.aspx?model=D845GVSR > > To see what a low density DIMM looks like, this is a Kingston datasheet > for a module used with the D845GVSR. The module uses (16) 64Mx8 memory > chips. An Ebay seller would try to sell you (16) 128Mx4 memory chips > on a module, and that is the high density stuff. At least with Kingston, > in this example, you can see what you're getting. Detailed construction > info for RAM, isn't always provided. > > http://www.valueram.com/datasheets/KVR333X64C25_1G.pdf > > The data HP lists for the Pavilion a705W, was accurate at the time > the information was released. But now that 1GB modules can be purchased, > the HP table needs to be updated. Even Kingston lists 2x1GB. > > http://www.ec.kingston.com/ecom/configurator_new/modelsinfo.asp?SysID=21604 > > I'd have to ask what Grandpa uses the computer for, before I'd shop for > 2x1GB of new memory. I've run machines with 1GB total and 2GB total, and > been happy with both. The 2GB configuration allows me to run a 1GB virtual > machine, using MS VPC2007, while managing to do other things. But Grandpa > might not be running such a configuration. For email, Word, or web > surfing, > it is possible 1GB would meet most daily needs. Even 768MB wouldn't be > that painful. I've worked with a WinXP 512MB machine of a relative, and > that "pinched" a bit and wasn't as snappy as it could have been. So I'd > probably like just a little bit more than 512MB. And 768MB might have met > that criterion. The Task Manager "Commit Charge" information, would allow > you to observe the peak memory usage during a working day. For example, > my peak today was 1.85GB, since I was running the 1GB virtual machine > for part of the day. > > If Grandpa was using Photoshop, that benefits from more RAM. If you don't > have > enough RAM, the computer uses the disk for temporary space. And the disk > is much much slower than RAM would be. So that might be an excuse for a > RAM > upgrade. > > Paul
From: JP on 27 Jan 2010 09:56 Paul, Good price on the following with a rebate.........will the RAM fit? WINTEC 2GB (2 x 1GB) 184-Pin DDR SDRAM DDR 400 (PC 3200) Dual Channel Kit Desktop Memory Model 3AMD1400-2GK-R "Paul" <nospam(a)needed.com> wrote in message news:hjobvo$4lt$1(a)news.eternal-september.org... > JP wrote: >> Grandpa has a HP Pavilion a705W (Part # PJ562AA) desktop machine that has >> room for a memory upgrade. The manufacturer's info in reference to the >> memory capabilities is as follows: >> >> Memory Component Attributes >> Initial Memory Installed 256 MB >> Maximum allowed 1 GB (2 x 512 MB) >> Speed supported PC2700 MB/sec (messages at PC2100) >> Type 184 pin, DDR1-333 SDRAM >> DIMM slots Two >> >> Presently, in the two slots there are two PC3200 sticks installed, one >> 256 MB stick and one 512 MB stick. The 256 MB stick is original and the >> 512 stick was added by a computer store. >> >> I have two PC2100 512 MB sticks from another machine that I can use in >> this machine. Based on the manufacturer's info above, messages at PC2100, >> what would be the best configuration to use in the two slots? >> >> Recap: I have two PC 2100 512 MB 184 pin sticks, one PC 3200 512 MB 184 >> pin stick and one PC 3200 256 MB 184 pin stick. >> >> I don't understand when HP states: "Speed supported: PC 2700 MB/sec >> (messages at PC 2100)." >> >> Am I better off with one 512 PC3200 stick and one 512 PC2100 stick or two >> 512 PC2100 sticks or a different combination? >> >> Also, Crucial states that I can install up to 2 GB of memory..is this >> correct? >> >> Suggestions? >> >> Paul will be able to answer this !!! >> > > The specs start here. The Northbridge is an 845GV. > > http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00255589&cc=us&dlc=en&lc=en&jumpid=reg_R1002_USEN > > To answer the question, I used a document I have on disk. Intel made > a motherboard based on 845GV, so I can use that as a source of advice. > > http://downloadmirror.intel.com/15210/eng/D845GVSR_TechProdSpec.pdf > > "If the processor's system bus frequency is... You can use this type > of DIMM... > > 533 MHz DDR333 or DDR266 > > 400 MHz DDR266 or DDR200" > > To start with, your PC3200 sticks support DDR400, DDR333, DDR266, DDR200. > The > above table predicts the hardware could support DDR333, so you won't > be getting DDR400 rates. If the BIOS is poorly written, you > may even end up at DDR266. > > The HP specs say the computer shipped with a Celeron 340 2.93 GHz/FSB533 > processor. > That would correspond to the first line in the table. A PC3200, PC2700, or > PC2100 > DIMM would work in the machine. If you mix speeds, the slowest DIMM > dictates what > speeds will be used. If you mix a PC3200 (DDR400) and a PC2100 (DDR266), > then > the slowest speed of DDR266 would be used. If you install two PC3200 > sticks, the > fastest they'll go is DDR333, due to the chipset limitation. > > By installing the PC2100 (DDR266) DIMM, you're limiting the peak memory > bandwidth to 2100MB/sec (266*8bytes). If a DDR333 DIMM was present and > run at full speed, you'd get up to 2700MB/sec bandwidth. So that is one > consequence of your switch to slower DIMMs. If the motherboard > BIOS had controls to change the memory speed, you could experiment > with the two options while you still had the PC3200 256+512 modules, > and see how much effect operating at DDR333 or DDR266 has. > But the motherboard BIOS setup screens may lack such a setting. > > You can verify the settings the computer has currently chosen to use, > with CPUZ. This program might allow you to verify it really > "messages at DDR266". Run the program and check the memory tab. > > http://www.cpuid.com/cpuz.php > > The Intel board with the 845GV on it, also seems to support 2x1GB. > If you buy 1GB DDR sticks, you'd want them to be low density sticks. > Sellers on Ebay may mention on their web page, that they're selling > high density sticks. > > http://www.crucial.com/store/ListParts.aspx?model=D845GVSR > > To see what a low density DIMM looks like, this is a Kingston datasheet > for a module used with the D845GVSR. The module uses (16) 64Mx8 memory > chips. An Ebay seller would try to sell you (16) 128Mx4 memory chips > on a module, and that is the high density stuff. At least with Kingston, > in this example, you can see what you're getting. Detailed construction > info for RAM, isn't always provided. > > http://www.valueram.com/datasheets/KVR333X64C25_1G.pdf > > The data HP lists for the Pavilion a705W, was accurate at the time > the information was released. But now that 1GB modules can be purchased, > the HP table needs to be updated. Even Kingston lists 2x1GB. > > http://www.ec.kingston.com/ecom/configurator_new/modelsinfo.asp?SysID=21604 > > I'd have to ask what Grandpa uses the computer for, before I'd shop for > 2x1GB of new memory. I've run machines with 1GB total and 2GB total, and > been happy with both. The 2GB configuration allows me to run a 1GB virtual > machine, using MS VPC2007, while managing to do other things. But Grandpa > might not be running such a configuration. For email, Word, or web > surfing, > it is possible 1GB would meet most daily needs. Even 768MB wouldn't be > that painful. I've worked with a WinXP 512MB machine of a relative, and > that "pinched" a bit and wasn't as snappy as it could have been. So I'd > probably like just a little bit more than 512MB. And 768MB might have met > that criterion. The Task Manager "Commit Charge" information, would allow > you to observe the peak memory usage during a working day. For example, > my peak today was 1.85GB, since I was running the 1GB virtual machine > for part of the day. > > If Grandpa was using Photoshop, that benefits from more RAM. If you don't > have > enough RAM, the computer uses the disk for temporary space. And the disk > is much much slower than RAM would be. So that might be an excuse for a > RAM > upgrade. > > Paul
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