OK Swappers, this is the last time I'll offer these for purchase before I put them on eBay. Please read the complete posting.
These items are working pulls from an MDD (Mirror Drive Door) system. The can be purchased together, or separately. No screws or clips included, use your old ones. If buying both items together, I will throw in some Arctic Silver 5 thermal compound, as well. Parts guaranteed not DOA. You can purchase both these items together for $135.00 shipped, in CONUS. Or, You can separately purchase the Dual G4/1.25GHz (1MB L3 DDR3 cache/CPU) CPU daughter card for $95.00 shipped, in CONUS. You can separately purchase the Apple OEM COPPER heatpipe heatsink for $50.00 shipped, in CONUS. First come, first served. PayPal only (credit card funded ok)! Reasonable offers considered. Next stop is eBay. This Dual G4/1.25GHz CPU daughter card is ready to install and run. This CPU card is also a prime candidate for over-clocking. Dual G4/1.42GHz CPU daughter cards are as rare as hen's teeth, but this Dual G4/1.25GHz CPU daughter card can probably be overclocked to 1.42GHz quite easily. In fact, if desired, I will perform the necessary mods for the purchaser, bench test the CPUs before shipment, and guarantee the card will be stable, or your money back. Here is a relevant link to a Barefeats comparison of the various multi-processor G4s: <http://www.barefeats.com/pmddr6.html> They show a average of 28% gain in overall speed due primarily to the CPU speed, and not to the different amount and type of L3 cache. The other advantage of this Dual G4/1.25GHz CPU card is it utilizes 7455B processors which, if you read the linked Apple Support discussion, can be easily, and significantly, over-clocked. The Dual G4/1.0GHz CPU is not going to overclock well at all because it is at its top rated speed, whereas the Dual G4/1.25GHz CPU should easily over-clock to 1.33GHz-1.42GHz, and possibly to 1.5GHz-1.6GHz: <http://discussions.apple.com/thread.jspa?messageID=5634964> As with all faster CPUs, there is an associated increase in generated heat when compared to slower CPUs of the same class. Apple supplied three types of heatsinks with the MDD models: Single CPU, at 867MHz, 933MHz and 1.0GHz, as well as Dual CPU at 867MHz and 1.0GHz originally came with machined billet solid aluminum heatsinks. These prove inadequate, especially in the dual CPU systems. The second, more efficient heatsink supplied with later models, was a solid aluminum base with copious, very thin, swaged stainless steel fins. These types of heatsinks were adequate for all but the Dual G4/1.42GHz systems. A helluvalot of Mac dual CPUs turned tits-up due to inadequate air-flow and inferior heatsinks. For the Dual G4/1.42, Apple developed an all copper combination heatpipe/heatsink. The all copper heatsink runs about 10C cooler than the other types of heatsinks used in the slower previous models. The copper heatpipe/heatsink was offered by Apple through its authorized dealer network to users wanting/needing the better cooling it afforded. The retail price for the copper heatpipe/heatsink was $65.00, plus tax and shipping. That's what I paid for mine. They are no longer available for purchase, except used. The only better cooling solution for MDD Macs are water cooling kits. However, they are usually one-offs and home made, but they are very efficient. There is an article with detailed measurements for machining/fabricating your own somewhere on the web. I've read it, but I don't have confidence in mixing "water" and electricity in the same box... If you like, I can over-clock the card to 1.4GHz before shipping, or you can do it yourself**, but you will need the copper heatsink for sure if you decide to OC the card. Should run stably though. If you need any further info, just let me know. Ross Holland Menlo Park, CA 94025 --~--~---------~--~----~------------~-------~--~----~ You received this message because you are a member of the LEM Swap group. To post to this group, send email to [email protected] To unsubscribe, send an email from your subscribed address to [email protected] LEM-Swap is not a discussion list; it is for buying & selling Mac stuff. Reply directly to the person who posted, never to the list. Software piracy is illegal and not allowed on LEM Swap. Except for freeware and software originally provided with computers, no software is to be left on hard drives unless the original installer (not a burned copy) is included, along with any required registration number, password, etc. Shipments valued at US$100 or more should be insured, and shipments valued at US$25 or more should be shipped so they can be tracked. See the list FAQ http://lowendmac.com/lists/swap.html for guidelines on postings, feedback, and dispute resolution. Seller feedback at http://groups.google.com/group/swap-feedback -~----------~----~----~----~------~----~------~--~---
