Rating: 
Summary: Why you might want the 256S100 instead
Review: A couple of people have complained about this card having high density chips, which are incompatible with their system. This happened with my Oct. 2000 Dell Dimension 4100. According to the person I spoke to at PNY's technical support (1-800-234-4597), since the high density 133MHz chips are *not* downwards compatible to 100MHz machines, but the low density 133MHz chips are, the 256S100, despite its name, actually contains 133MHz chips. (I suppose it is cheaper to inventory this way.) And they are low density. So the 256S100 is the correct choice for someone like me whose specs call for a 168 pin DIMM of 133MHz SDRAM, but whose computer cannot handle the newer high density chips. What seems to have happened--which I learned from Viking Components tech support as I was comparing with their cards (compare their DL3264M with their PC13332X64-CL3: the specs are the same, and sometimes the cards are identical, but the second is guaranteed to be 16 low density chips, whereas the first may or may not be 8 high density depending on what they have when they ship) is that if the card makers have them, they put high density chips on their cards; otherwise they put on the low density. This of course--and inexcusably--makes the compatability information on the card-makers websites obsolete, and leads to problems like those seen in some other reviews, which I also experienced.So I would like to suggest getting the 256S100 if you have any doubts about whether your computer can take the high density chips. The 256S100 is indeed working in my computer, and my BIOS claims it is 133MHz, despite its name. But what you should really do is call tech support and make sure your computer can handle the card before you buy.
Rating: 
Summary: works with dell !
Review: Dell Dimension 4100, 800MHz, purchased Sept 2000, PC133-SDRAM.
Please note that amazon picture shows "PC100-133" card, the one i got was "PC-133 only"
Rating:
Summary: pny technologies buy it good for gaming
Review: gaming is one thing that i love and the 3D games were runing slow
so i got this memory and every thing changed this upgrade is worth it if you only have 256.
Rating: 
Summary: I need help with this thing
Review: How come my PNY does not work on my computer. I already try the thing that you say to go to MSCONFIG, but still it does not work.
Rating:
Summary: Think before you buy
Review: I bought this memory from amazon.com and installed in my Dell Dimension L series 866MHz PC. This computer has already a 128 MB DIMM PC133 SDRAM installed in it. After installation, my computer showed only 144MB RAM. But when I installed the new (256MB) RAM, the computer showed 16MB RAM and did not boot because of lack of memory. I talked with the PNY technical support and they suggested me to return the product to amazon.com and to buy a 256MB PC100 SDRAM. The other thing is that when I checked with Dell support, they told me to buy PC133 SDRAM and PNY is suggesting to buy PC100 SDRAM. I don't know what should I do now to solve this issue.
Rating:
Summary: Satisfaction guaranteed
Review: I bought this to supplement the 128MB RAM that came with my 2-year old Dell Dimension 4300. I'm no geek and it was the first time I ever opened my tower. I had a little trouble figuring out how the secure the card because I was afraid to press too hard but it went in ok and my system recognized the upgrade as soon as I switched it back on. No complaints.
Rating: 
Summary: I think 256S100 is the right choice
Review: I brought this memory on the recommendation of Reviewer: R. Geissman "rlgeissman" (Lodi, OH United States). I have an E-machine T1300 1.3 GHz Celeron system that is a step up from the E-machine T1220 and the memory only reads at half the capacity. Instead of the chip reading 256mb it only shows 128mb. I had used the PNY Configurator that indicated that I should use 256S100 but R. Geissman recommendation was too strong to pass up. Well, I must say a lesson learned. No hard feelings R. Geissman. I'm going to order the PNY 256S100 and see will it do the trick. I hope this review helps someone who has an E-machine of this model.
Rating:
Summary: It's compatible with Dell Dimension 4100
Review: I disagreed with ANONYMOUS' review of March 20 that this 256MB PC133 memory module is incompatible with Dell Dimension 4100. I have the same model desk top (P3 800MHZ) purchased Sept 2000 (see my review of Mar 22).This memory upgrade works so well, I just purchased a second one to upgrade my memory to 512MB. All you have to do is to open the case, plug in the module and restart the computer, check the system property, your memory is upgraded.
Rating:
Summary: If you don't have a new computer beware
Review: I have a 800MHz Pentium III. This computer is not the newest computer, but it is not an obsolete computer either. I bought 512 MB (2 256dimms) of RAM and to my surprise, the computer only recognized half of it! The problem is not the computer, in the PNY web site there's a warning about using this "high density" memory with old (1999 and older) motherboards. When I saw the following, I knew this has happened to a lot of people before me. From the PNY web site: 7) Why does my system only see 25% or 50% of the total memory installed?
Answer
Older (Pre 1999) systems may require an older memory module design that PNY and most other manufacturers no longer make. Some of these modules are still available, but they are not generally easy to find. The modules that we now manufacture use a high-density construction. These new modules will not work properly in your older system. If you have already purchased a module, and that module is not working in your system, return the module to the store where you purchased it within the time of the return policy. If you are running Windows 98 check "MSCONFIG" to make sure that your system is not limited to a set number of megabytes of memory. Go to "Start", select "Run", and then type in "MSCONFIG". Press "Enter", then go to the "Advanced" button at the bottom, and look to see if there is a check mark in the box that says, "Limit memory to". This should be unchecked. If you make a change here, you must reboot before any changes will take effect.
Rating:
Summary: BEST $... I'VE EVER SPENT!
Review: I have a Dell P3 800 MHZ with a 128mb ram memory. I purchased the PNY 256mb memory upgrade, plugged it in my computer, triple my memory instantly!
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