PapaLex606 Posted January 28, 2009 Report Share Posted January 28, 2009 Hi ya, im looking to upgrade my ram from 1gb(2 x 512mb) to 2gb. Im stuck over one thing, i keep coming across these two different densitys; 128 x 64 and 128 x 4(high). What do they mean? Is one better than the other? Any help woulod really be appreciated. The memory i've been recommended by various websites are: - 1GB, 184-pin DIMM, DDR PC2700 memory module CT12864Z335Module Size: 1GB Package: 184-pin DIMM Feature: DDR PC2700 Specs: DDR PC2700 • CL=2.5 • Unbuffered • NON-ECC • DDR333 • 2.5V • 128Meg x 64 • but i've also seen: - 1GB, 184-pin DIMM, DDR PC2700 memory module CT12864Z335Module Size: 1GB Package: 184-pin DIMM Feature: DDR PC2700 Specs: DDR PC2700 • CL=2.5 • Unbuffered • NON-ECC • DDR333 • 2.5V • 128Meg x 4 (high) • MY computer model is: HP Pavilion t185.uk Quote Link to post Share on other sites
sethook Posted January 28, 2009 Report Share Posted January 28, 2009 Easiest way to go.Guaranteed to work. Quote Link to post Share on other sites
PapaLex606 Posted January 28, 2009 Author Report Share Posted January 28, 2009 Cheers but i've already been there mate. I just want to know the difference between those two figures. 128x64 and 128x4(high). Crucial sell the 128x64 version where another site and a mate has recommended one that says 128x4(high). Quote Link to post Share on other sites
Pete_C Posted January 28, 2009 Report Share Posted January 28, 2009 http://reviews.ebay.com/Myth-Low-Density-v...000000001236178http://en.wikipedia.org/wiki/DDR_SDRAMBasically Low Density modules should be compatible with all motherboards; but only SOME motherboads will support high density modules.Unless your board specifies that it will support high density RAM do not spend the money.Secondly , High density RAM is slower than LOW density so why would you buy RAM which is slow??? (See the next line for why they are slower)High Density RAM devices were designed to be used in registered memory modules for servers.You should not mix registered and unregistered memory.Should you mix them if you can? NO, never mix RAM of different specifications it is just asking for instabilities and errors. Quote Link to post Share on other sites
PapaLex606 Posted January 28, 2009 Author Report Share Posted January 28, 2009 which one is the high density one though? the 128 x 4(high) im confused because the 128 x 64 has the higher end figure. The reason i ask is because the one on crucials websites(128 x 64) is like £56 for 2 and the one from the ebay store is like £26.00 for 2 says, the only difference is the one on ebay says 128 x 4(high) instead of 128 x 64. im not sure if my motherboard supports a high density one, my computer is a HP Pavilion t185.ukIf you were me which of these would you buy if you wanted to upgrade your ram from 1gb (2 x 512mb) to 2gb! Quote Link to post Share on other sites
sethook Posted January 28, 2009 Report Share Posted January 28, 2009 I would go with the Crucial memory as it is guaranteed to be compatible and is good memory. Quote Link to post Share on other sites
PapaLex606 Posted January 28, 2009 Author Report Share Posted January 28, 2009 man i hear what your saying....go crucial, you've mentioned it twice, but thats still not an answer to my question. I want to find out why there are two almost identical memory cards costing very different prices! one that says 128x64 and one that says 128x4(high. They are both the same card so i wanna know if 128 x 4(high) one would work on my comp and if so is it better or worse than the 128 x 64. Im a student so im skint. If i can buy something thats gonna do the same thing for half the price then thats something special.this is the one crucial recommends: - http://www.crucial.com/uk/store/mpartspecs...EBD9626A5CA7304these are the ones i've found on ebay!http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...em=360127222069this is anoither i found on ebay: - http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...E:X:AAQ:US:1123Chip Configuration: 128x64 Chip Density: 128x4 (High Density) but the crucial one just says 128 x 64! do you see what i mean? crucial doesn't mention if its high density or not like these other companys do. Quote Link to post Share on other sites
Pete_C Posted January 28, 2009 Report Share Posted January 28, 2009 http://en.wikipedia.org/wiki/DDR_SDRAM>In the context of the 1 GB non-ECC PC3200 SDRAM module there is very little visually to differentiate Low Density from High Density RAM. High Density DDR RAM modules will, like their Low Density counterparts, usually be double sided with eight 512 Mb chips per side. The difference is that each chip, instead of being organized in a 64M x 8 configuration is organized with 128M bits and a data width of 4 bits, or 128M x 4. To further confuse the issue, some RAM is labeled as 128M x 8, and is also called high density.I think one of those must be a typo.I suggest buying from a reputable dealer and first run the crucial advisor to find out what you have installed now and what they recommend. Buy something that matches the specs of what you have now. Quote Link to post Share on other sites
sethook Posted January 28, 2009 Report Share Posted January 28, 2009 which one is the high density one though? the 128 x 4(high) im confused because the 128 x 64 has the higher end figure. The reason i ask is because the one on crucials websites(128 x 64) is like £56 for 2 and the one from the ebay store is like £26.00 for 2 says, the only difference is the one on ebay says 128 x 4(high) instead of 128 x 64. im not sure if my motherboard supports a high density one, my computer is a HP Pavilion t185.ukIf you were me which of these would you buy if you wanted to upgrade your ram from 1gb (2 x 512mb) to 2gb!That's why I suggested Crucial. No more, no less. Cost factor was not mentioned until your last post.Also, not knowing if your motherboard will support high density, would lead me to buy guaranteed memory. The hassle of returns and the frustrations with getting a wrong part is just not worth the price difference to me. Quote Link to post Share on other sites
PapaLex606 Posted January 28, 2009 Author Report Share Posted January 28, 2009 ...yeah man, i guess your right. I really cant be arsed with the hassle of sending back if its wrong, im desperate for it. Plus, i have asked this question to like 3 of the sellers on ebay and not one has answered, so i guess that says it all. Thanks for your help bro and everyone else who responded so quickly. Quote Link to post Share on other sites
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