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AFAIK these work by doubling the onboard oscillator. So assuming the 840av runs at 40mhz bus speed, you'll get 80mhz - which will be too hot. If you want to mod the oscillator you might have luck - but that might bugger up other things in the 840av. The 800 it would prob. work in however.

Well not sure about the $80 for a 4mb memory card (new reproduction 4mb ones were $40 a while back) - but who knows with ebay. ok will look forward to the post

oh come on.. "I have no idea". I highly doubt this... The zipgsx is prob worth at least $100 USD at the other place. EDIT: just saw the pics. Well - I'll offer $100 USD for both. Could you please keep all bidding in the thread?

this was a relist which failed to sell for $50 before. You only hear about these when the price is high.

The adaptec powerdomain PCMCIA SCSI card (mac variant of slimscsi) is probably what you want here.

depending on what exactly the memory, accelerator & scsi card are they could go from reasonably expensive to megabucks. interested in the accelerator & mem card (if equal to or larger than 4MB)

I've tried both the acard 7220U and a yamaha one and they both fit. Tight squeeze though yeah.

macbench too. Why the double posts btw?

maybe run some benchmarks to show how fast? if it's that image 040 one, try some photoshopping too?

which makes me wonder how far does it scale? Say a q950 plus a thunder IV and 4 photoengines? You'd hope your gaussian blur would be plenty fast by then!

that's only three cards there - the scsi array and wacom tablet are not nubus cards. If you were running out of slots, you could get an external nubus enclosure, but I'm not sure how well this is supported (Only avid setups?). btw - the photoengine works cooperatively with the thunder IV?

http://en.wikipedia.org/wiki/IBM_Personal_System/2 More like only the model 25 and 30 used an AT style bus. The rest (the majority) used MCA. The main feature is that it's probably the best performance you are going to get (expansion wise) with a 286 based machine. Also, most software will...

Well the point is that the q840av notes say it is doing something faster wrt nubus speeds through the cpu. I assume they are comparing it to existing quadra models (such as the q950). Assuming Apple isn't flat out lying, what is responsible for this increase in speed and did anything take...

trag: Yes, but: "Supports the full range of NuBus master/slave transactions with single or block moves, including dumps and runs in which the main processor is master and the NuBus is slave , supports faster data transfer rates to and from the CPU bus, and supports NuBus 90 data transfers...

From the Q840av notes RE improved nubus: "Improved NuBus interface. Both models use the Macintosh Universal NuBus Interface (MUNI) for accessory cards. This interface supports block transfers and data bursts to and from the main processor bus. MUNI capability is optional in the Macintosh AV...

Some links: "Macintosh: SCSI Data Transfer Rates" http://docs.info.apple.com/article.html?artnum=12315 "Developer Notes: All Hardware Products" http://developer.apple.com/documentation/Hardware/hardware2.html Apparently the 840av has a tweaked nubus design - it'd be interesting to see if...

Well it's like getting a motherboard with everything integrated. Chances are you wouldn't have chosen the parts that are built in and you don't even have the option of removing them - nothing inbuilt in the 840av is best in its class once upgrade cards are regarded. IMO a Q840av can't compete...

no onboard video? bzzt... q950 has very fast onboard video Out of the box doesn't come into it - we're talking ultimate here. With the 50MHz upgrade I'd bet they would bench at least equally as fast in every respect, but the 950 is more expandable. Feature for feature, a tweaked 950 creams a...

right you are - oops!

Yeah the macpicasso is smoked by the q950 onboard video in benchmarks I've done - macbench I think it was. I'd imagine the same would be true with the Thunder IV. It's nice to have both options though (photoshop acceleration, 4mb ram, other driver features). I like the 950 myself - although...