Thinkpads Forum

Has anyone seen this?
Is it really Low Density, because picture only show 4chips. Chip Configuration: 32X64. Could it be like rkawakami mentioned, some low density does comes in 8chips. This is also from a power seller. If it doesn't work, worth a try so cheap. I'll let you'll know when once i recieved it for my iSERIES 1200 1161.

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0002828162

Admin edit: Shortened URL to prevent horizontal scrolling

My best guess would be that it is not a "low density" module. The seller does not list which systems it is designed for. Instead, there's this quote:

"WE CAN NOT GUARANTEE COMPATIBILITY OF THESE MODULES WITH YOUR SYSTEM".

The 8-chip low density module I bought last month was guaranteed to work with a large list of Thinkpad systems. Those systems are known to require modules which conform to the 4K refresh specification that "low density" implies.

Despite the aforementioned compatibility statement made by the seller, he appears to stand behind the module with a 20 day guarantee. if the module ends up not working in your iSeries system(s), you'll be out the return shipping and the $6 restocking fee (looking at their "fine print" in the auction description). I've also looked through their other current sales and see that they also use the "low density" moniker for DDR2 modules .

Being listed as a "Power Seller" shouldn't really mean anything. I've seen fairly new sellers that only have a dozen or so feedbacks listed as such. To help research any seller's feedback history, use this tool:

http://toolhaus.org/

Plug in the eBay ID in the "Negative/Neutral Feedback" option near the top of that page and you'll get only those negative and neutral feedbacks left by buyers. When doing this, I'd pay particular attention to the replies left by the seller. It gives good insight into their handling of "customer service".

So does the chip configuration mean anything, 32X64?

Generally speaking, all that means is that the memory configuration is 32M addresses by 64 input/output (IO) pins. There's eight bits to a byte so that makes it 32M x 8 bytes, thus, a total of 256MB of storage. Without knowing exactly which components are on the board, and the total number of those parts, you can't really determine anything from just the "32x64" description.

edit - Here's an example: http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0261842057

This is listed as 32x64 but also includes the "high density" designation. There appears to be eight devices on this board and from everything else I see, this is high density.

Yea, i think you are right the seller doesn't know the different between low and high. I questioned him why low density when there's only 4 chips. He replied that 4 chips on each side and 16x16. Which comes out to 256. That was different than his advertisement of 32x64.