🚀 go-pugleaf

pgrb <pgrb@ygdrasil.demon.co.uk> wrote:

> I am running a Centris 610 with 12 Mbyte RAM, and now is the time to
> upgrade as Netscape apparently wants 16Mb in its new(ish) incarnation, and
> MacOS 8 requires 8 Mb.

RAM Doubler might be an idea *as well as* more RAM.  (20MB real RAM RAM
Doubled to 40 MB seems to work well on my Performa 475).

[snip]

> 60ns SIMMs are ubiquitous and extremely price competitive - so any
> problems using them?

Not that I know of - the SIMMs need to be fast enough and that's it.
Faster than the minimum speed doesn't harm anything that I know of (it
might even help a little bit by reducing chance of problems caused by
logic line loading which might slow things down - if the SIMMs are
faster than needed, this should be less likely to happen.   Not that it
should be a problem in the first place or anything like that.)

> Finally, I believe that whatever SIMM is used, it requires a 2kHz refresh
> rate - are there any manufactured that aren't?

Haven't a clue.

> Finally, finally - does anyone know if the Centris senses SIMM speed (I
> think using presence line which have comninations of resistors on the SIMM
> to indicate it's speed to the hardware).

No idea.

> And finally finally finally - any experience of using Mac Supplies or
> Discs Direct, both of whom seem to have competitive SIMM prices.

I have no experience of Discs Direct.  I have experience of buying from
Mac Supplies - an external HDD.  They took the money off the credit card
twice, refused to consider that they'd made a mistake and refused to
look into it.  The credit card firm eventually got it back, but that
took 10 weeks.  I would go near Mac Supplies again, but only to plant a
small nuclear bomb in the warehouse (not covered by insurance, you see).

[snip]

> P.S. above questions also apply to VRAM - the Centris 610 specifies 100ns
> VRAM, other Macs 80ns.

AFAIK, the same applies - you shouldn't have any trouble with faster
VRAM.

Rowland.


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pgrb <pgrb@ygdrasil.demon.co.uk> wrote:

> And finally finally finally - any experience of using Mac Supplies or
> Discs Direct, both of whom seem to have competitive SIMM prices.

I had experience of DD last week and it wasn't entirely favourable.  I
orderd a 32mb DIMM and some CD-Rs on Mondya and was told it's be here by
Friday probably on Wednesday, it hadn't turned up by 12 noon on the
Firday so I called them (Couriers invaribably make their deliveries to
my house between 10-11am if they are going to deliver atall) and was
told it was sent ont he monday I ordered it was deffinitely on it's way
today.  Nothing arrived, I called Saturday morning and was greeted with
"We are currently closed for a stocktake, please call back in 1 hour",
so I did every hour up until 6pm and got the same message every time,
ditto Sunday.  On Monday it hadn't arrived by 12 noon so I called and
spoke to one of thier staff who eventually found the order and said it
hadn't been sent and she'd call back to tell me why.  They actually
called back and whilst digging around she finally found the order and
told me it had indeed been sent and would be there by 1am, Cash on
Delivery, I'd actually asked to pay by credit card and they'd taken the
details, she assured me I wouldn't be charged on the card (and I wasn't)
and could I pay COD which was fine.  Still by 1:30 no courier, I called
back and she confirmed all my details again and said she'd have a word
with the couriers (she had already said that the couriers they used were
as good as useless anyway and had blamed the delays on them) anyway I
finally got a call from the courier who gave my details only to find out
that DD had put the wrong address on the box, an hour or so later it
finally arrived, hardly what I expected from a comapny who charges 9
quid odd for 24 hour delivery.
If I was you I'd call DABS, they were a quid cheaper on the DIMM I
wanted and their delivery is cheaper too, it's a pitty their CD-Rs are
so expensive otherwise I would have ordered my stuff from them like I
normally do. 0800 680000 if you are interested.

In article <pgrb-1201982300260001@ygdrasil.demon.co.uk>,
pgrb@ygdrasil.demon.co.uk (pgrb) wrote:

> Can anyone definitively tell me if higher speed SIMMs will work/have any
> deleterious effect.

When computer manufacturers specify a SIMM speed, they're telling
you the slowest speed that will work.  Anything faster than that
will work just as well.  Faster SIMMs probably won't result in a
faster computer, however, since the motherboard probably won't be
ready to received the data much faster than a SIMM of the specified
speed would supply it.

> Finally, finally - does anyone know if the Centris senses SIMM speed (I
> think using presence line which have comninations of resistors on the SIMM
> to indicate it's speed to the hardware).

Not necessary -- the SIMM itself tells the motherboard when the
data it asked for is ready for collection.

Simon.
-- 
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 Check email address for UBE-guard.  | would *blink*. -- Nancy Lebovitz
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Rebecca and Rowland <real-address-in-sig@flurbletigibbet.rhubarb.foobar>
wrote:

> > And finally finally finally - any experience of using Mac Supplies or
> > Discs Direct, both of whom seem to have competitive SIMM prices.
> 
> I have no experience of Discs Direct.  I have experience of buying from
> Mac Supplies - an external HDD.  They took the money off the credit card
> twice, refused to consider that they'd made a mistake and refused to
> look into it.  The credit card firm eventually got it back, but that
> took 10 weeks.  I would go near Mac Supplies again, but only to plant a
> small nuclear 

Try performance direct, I've had excellent service from them, and they
will generally match anyone elses price. I've used them both for
personal and work stuff, they've been quick, polite, honest and if there
was a problem very good about returned goods.

-- 
'ric

Paul Womar <Newsmaster@pwomar.demon.co.uk> wrote:

[snip]
> If I was you I'd call DABS, they were a quid cheaper on the DIMM I
> wanted and their delivery is cheaper too, it's a pitty their CD-Rs are
> so expensive otherwise I would have ordered my stuff from them like I
> normally do. 0800 680000 if you are interested.

Every time I've tried to buy something from Dabs Direct, they've not had
what I wanted in stock - fine for bits for new Macs, but VRAM for a 475?
`Sorry, we just can't get that sort of VRAM any more - we might have
some in stock in two or three months'.  An 8-bit modem?  Same story.
etc.

Rowland.

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ric <btgsch@rmplc.co.uk> wrote:

[snip]

> Try performance direct, I've had excellent service from them,

Ditto.

Rowland.

[snip]


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Remove the animal for my email address:   rebecca@astrid.dog.u-net.com
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In article <1d2v19p.1pk0af088q8lcN@pwomar.demon.co.uk>,
Newsmaster@pwomar.demon.co.uk (Paul Womar) wrote:

>> And finally finally finally - any experience of using Mac Supplies or
>> Discs Direct, both of whom seem to have competitive SIMM prices.
>
>[snip]
>If I was you I'd call DABS, they were a quid cheaper on the DIMM I
>wanted and their delivery is cheaper too, it's a pitty their CD-Rs are
>so expensive otherwise I would have ordered my stuff from them like I
>normally do. 0800 680000 if you are interested.

I have read some bad things about Mac Supplies and with what Paul has said
about Discs Direct, my advice would be to steer away from both of them and
go with Dabs Direct. I have used them a lot and find them efficient and
fair (when an order came late once they refunded the cost of delivery
without question).
-- 
Simon Phillips
mailto:s@netcomuk.co.uk
http://www.netcomuk.co.uk/~s

ric <btgsch@rmplc.co.uk> wrote:

> Try performance direct, I've had excellent service from them, and they
> will generally match anyone elses price. 

Me too. I purchase all my RAM for both home and office from then and
also find their service excellent, their prices competitive, and they do
stand by their price promise even after the product has been purchased.