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RAM BY Manufacturer RAM BY TECHNOLOGY audio& Video Recording STORAGE & Hard Drives Batteries & Power FORMS terms Prices: are in Canadian Dollars, and are subject to change without notice. please Email to confirm price before ordering. GST is extra in Canada, GST & PST are extra in BC & QC, HST in NB, NS & NF. EMAIL your order or fax to (250) 385-6267 or use the SECURE ORDER FORM. Make sure to include the make and model of your machine, your full shippping address, phone number, correct email address, the number, expiry date and name on your credit card plus the card billing address and phone if different from shipping address. Payment accepted by VISA or Mastercard or Canadian bank Interac Email Transfer. It must be your credit card and the card billing address and shipping addresses must match. For your protection, we may ask for additional proof of ID to be faxed. Third party address shipments require faxed confirmation. PayPal accepted with a +3% service charge, shipped to verified address only. Gov't, Education and Corporate PO's accepted on prior approval of credit only. Download the Credit Application form and fax to (250) 385-6267 Shipping & handling: $7.99 shipping for RAM via Expedited Post (4 - 8 days) or FREE with your order of $300 or more, Shipping is at buyer's risk, Shipping insurance is 1.5% extra on the goods value or by quote - if declined, the buyer assumes all risk of loss or damage. Signature is required for insured parcels. Installation: Outside of Canada or the USA? We generally sell
to North American addresses only. Please Email for shipping costs. Use our SECURE
ORDER FORM |  |
iMac G5 1.6 GHz - 2.0 GHzwith DDR RAM - 64 and 128-bit memory access The iMac G5 Revision A and B machines packs a lot of power into one pizza box. They have a full G5 processor at 1.6 GHz, 1.8 GHz, or 2.0 GHz, and a stunning 17" or 20" LCD monitor. One thing it is short of compared to the PowerMac G5 machines is memory sockets - there are only two sockets. If you recall, the PowerMac G5 machines require RAM to be installed in pairs, allowing the machine to do Dual-Channel DDR access, which speeds up memory operations considerably. Because of the space limitations in the iMac G5, Apple elected to go with 2 single sockets. This means that you don't have to buy RAM two at a time, but you also give up the potential speed increase of Dual-Channel memory. There is one speed-up available; Apple says if you install a matched pair of DDR DIMMs in the two sockets, then the memory will be accessed on a 128 bit wide path, instead of the normal 64-bit path. That's great - except they do not define what "matched pair" means. It is not sufficient to simply install two PC3200 DIMMs of the same size - the two DIMMs need to match each other at the chip level, so that the machine sees them as being identially arranged electronically. First step: Don't order extra RAM from Apple The easiest way to do this is to buy the iMac with the minimum RAM, as Apple's price for RAM is too high. Order one 1 Gb module from us; or if you order a pair of 1 Gb DIMMs from us, we'll guarantee they match. But, what if you already have an iMac G5 with a single 512 Mb DIMM in it - is there a way to buy another 512 Mb DIMM with a guarantee that it will "match" the Apple-supplied 512Mb? In a word, no. Apple does not publish the technical criteria required for the machine to match the pair of RAM for 128-bit operation, and they also do not guarantee the configuration of the 512 Mb DIMM that they supply. Because Apple buys RAM from a number of different suppliers, there is no assurance that the same specification RAM will be in two different iMacs, either. So, matching the Apple DIMM is a crapshoot whichever way you look at it. How much difference does 128-bit access make? Apple says it is "faster" but makes no statement about how much faster. Tests by Barefeats indicate that while memory perfomance on synthetic memory benchmarks is up to 29% faster, any performance improvement on real-world applications is within the margin of error of testing. Do I need to match my RAM? If you are upgrading to 2 Gb of RAM, by all means make sure you get a matched pair. The debate is at the 1 Gb level; whether to buy a pair of 512's and sell off the stock 256 Mb, or to simply add a 1 Gb DIMM for 1.25 Gb total. I lean toward the 1 Gb DIMM philosophy, simply because upgrading to 2 Gb later can be done without having to remove the two 512's. iMac G5 "iSight" 1.9 and 2.1 GHz: iMac intel CoreDuo, Mac Mini intel CoreSolo and CoreDuo, and MacBook and MacBook Pro CoreDuo However, if the choice is between a pair of 512's for 1 Gb total, vs. a 512 + a 1 Gb for 1.5 Gb total, you will get more mileage out of the mismatched RAM for 1.5 Gb. Especially with OSX programs running under Rosetta, the machine really needs that extra 512 Mb. So 1.5 Gb unmatched trumps 1.0 Gb matched. As above, a matched pair is a pair of memory modules that are identical in their speed and capacity (that part is easy) and also in their "composition". This is the internal organization of the rows and columns of the memory chips on the module, and the Serial Presence Detect settings. Unfortunately, Apple does not publish the exact specifications on how the RAM must match. Theoretically, RAM from different companies could match, but there is no way to tell in advance. So, the only 100% way to get a matched pair is to buy 2 of the identical modules at the same time. Buying one later of the same brand and model may match, but may not, because manufacturers change their products' builds all the time - even a "name" brand like Kingston or Crucial is no guarantee that two modules purchased at separate times will make a matched pair. We can guarantee a matched pair only as long as we have RAM from that same batch in stock, which may be a few weeks. After that, the chance of matching is still very, very good, but cannot be guaranteed 100%. That chance diminishes over time, until after a year or two, it becomes a toss-up that any module will match.
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your order or FAX Orderform to (250) 385-6267 Don't see what you are looking for? Email us or use our quote request form We feature Kingston, Crucial, Certified, NuImpact, Buffalo Techworks and Corsair memory: We also offer guaranteed generic RAM - please Email for a quote. We only sell new, fully warranted premium-quality RAM that meets or exceeds manufacturers' specifications and that has been tested for compatibility. Full RAM manufacturers' warranty terms apply. We do not sell used memory, "pulls", remanufactured modules, "B" stock or rejects. Read the Terms and conditions of sale. Availability and price can change without notice. Email for up to date prices Privacy Statement: Any information submitted to CanadaRAM will kept confidential and used only for CanadaRAM business communications. Your Email address will not be sold or given to any others. Our order form is secured by SSL and 128 bit encryption. Customer data is not kept on publicly-accessible servers. Better Business Bureau Online Reliability Program - click to verify CanadaRAM Ltd.'s status Any questions or concerns? email administration@canadaram.com Dealer for: Xerox/Tektronix, HP, Canon & Epson colour printers, Hewlett-Packard laser printers and plotters, Samsung, Brother, Xerox and Xante laser printers, Linksys, DLink, SMC, Asante & Farallon Networking, Tritton, LaCie, Maxtor, Seagate, Western Digital & Fujitsu hard drives, Sony, Sharp, NEC, Viewsonic & Mitsubishi monitors, Sonnet CPU upgrades, LG, Pioneer, LiteOn & Sony CD Recorders, Edirol, Alesis, Access, M-Audio, Numark, ESI digital audio hardware, Ensign POS, Adobe, Quark, Microsoft, Symantec, Colorvision, Steinberg, Native Instruments, Waves, Propellerheads software.
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