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Documentation about the Vampire hardware

Info About Energy Consumption

Manfred Bergmann

Posts 226
23 Apr 2020 13:21


I'm wondering about how much energy (Watts) the Vampires need.
Do you guys have some specs for this?

The FPGA, does it require more or less energy than a 680x0 asic?

Manfred


Knight Stone
(Needs Verification)
Posts 136/ 1
23 Apr 2020 13:57


Manfred Bergmann wrote:

I'm wondering about how much energy (Watts) the Vampires need.
  Do you guys have some specs for this?
 
  The FPGA, does it require more or less energy than a 680x0 asic?
 
 
  Manfred

That's a very good question. I would be interested to know what sort of PSU the team would recommend. I use a 200W Dell SFF PSU, does the job great.


Manfred Bergmann

Posts 226
23 Apr 2020 17:12


The point for me is:
I'm running an A1200 with Indivision, CF, RapidRoad, ACA 1233n (or something, 68030 with 40MHz) with a stock but recapped A1200 PSU.
This works great, no problems.

Can I just replace the ACA with V1200? Will it need more power than the ACA?


Markus B

Posts 209
23 Apr 2020 17:23


As the V4 is powered by an USB PSU and the FPGA doesn't have any cooling, it can't be that much.

I'd guess it draws less power than the previous setup.


Roy Gillotti

Posts 517
23 Apr 2020 21:37


I would say likely, especially if your current setup is running a RapidRoad and 68030 accelerator.


Knight Stone
(Needs Verification)
Posts 136/ 1
23 Apr 2020 21:51


Manfred Bergmann wrote:

The point for me is:
  I'm running an A1200 with Indivision, CF, RapidRoad, ACA 1233n (or something, 68030 with 40MHz) with a stock but recapped A1200 PSU.
  This works great, no problems.
 
  Can I just replace the ACA with V1200? Will it need more power than the ACA?

Well, the team says you can run with the trapdoor closed, so it can't generate that much heat, or use that much draw.

Just take the power connector off your PSU, and wire it up to a lower power SFF ATX PSU. Covers all bases.




Manfred Bergmann

Posts 226
23 Apr 2020 22:29


I'll measure it.

Stats for my A600 with Indivision ECS, CF, and V600:
~24.5 W idle
~26 W under load

Not a lot actually.


Manfred Bergmann

Posts 226
23 Apr 2020 22:54


My A1200 with Indivision, CF, RapidRoad, ACA 1233n takes:
~22W with load or idle, doesn't make a difference.

The stock 1200 PSU can deliver 300mA at 230V, which is ~69W.
So I would say there is quite a bit of space for enhancements.

I'll put in the V1200 and see what I get with it.


Markus B

Posts 209
24 Apr 2020 10:51


Good idea.
  For proper comparison, please measure the A1200 w/o any extension.

I did so just for my A1200 with just a CF card installed. No extension at all.

The PSU is replaced by a RT-50B. It draws between 19-22W. But I wouldn't give too much about the accuracy of my ammeter.


Andy Hearn

Posts 374
24 Apr 2020 10:53


This is a pretty interesting thread.
  have a look at the output side of the PSU see what that gives you.
  looking at the 240v mains input side is going to include AC->DC conversion losses, parasitic losses, losses through "we tried to make this as cheap as possible". So it gives you an idea of what fuse to put in the mains plug. remember having to wire a mains plug and scrabbling about for fuses? kids these days...
 
  i can't get to a PSU right this second as the Wife's doing Yoga in the "room of requirement" - but if i recall, it was something like 3-4 amps on the 5volt line which is 15-20Watts, and 0.5? amps on the +12 which is another 6watts - so totalling just over 25 watts.
 
  to think you can get more out of a USB charger these days!
 
  but yeah, i don't see the CycloneIII pulling more than a 68030 by a long shot. definitely less than the toaster oven that is an  040!
 
  what power monitor are you using? i'm curious to run some numbers myself

[edit] speling mistokes


Pat 3657

Posts 50
24 Apr 2020 10:55


300mA at 230V is the input. More important is the output at 5V and 12V the PSU can deliver. AFAIK most Amiga PSUs are around 25W output, so there is not much headroom.
  A nice and detailed documentation about Amiga PSUs can be found here:
  EXTERNAL LINK


Markus B

Posts 209
24 Apr 2020 10:59


15W for USB is already a lot.
Micro-USB is more or less limited to 10W (2.1A).
For more, USB-C is needed.


Markus B

Posts 209
24 Apr 2020 11:01


Pat 3657 wrote:

EXTERNAL LINK 

Interesting link, thanks.
I doubt that my ammeter is accurate if I read the numbers there.
Need to pull the other one I have later and verify.


Manfred Bergmann

Posts 226
24 Apr 2020 12:42


@Pat 3657, Andy Hearn
 
  Indeed, I did only look at the input side.
  So according to this link the orig A1200 PSU can deliver 22,2 W output.
 
  When I measured 22W input, how much would the output be?
  Can there be a factor assumed for any power loss?
 
 
  Manfred


Manfred Bergmann

Posts 226
24 Apr 2020 13:18


Manfred Bergmann wrote:

My A1200 with Indivision, CF, RapidRoad, ACA 1233n takes:
  ~22W with load or idle, doesn't make a difference.
 
  The stock 1200 PSU can deliver 300mA at 230V, which is ~69W.
  So I would say there is quite a bit of space for enhancements.
 
  I'll put in the V1200 and see what I get with it.

So, I've just put in the V1200.
Under no load, the overall power draw is a bit less. Like ~19W.
This can probably rise a bit when Vampire IDE, DIGITAL-VIDEO etc is used.


Markus B

Posts 209
25 Apr 2020 12:03


I verified now with an accurate ammeter. This shows 12,5 to 13 watts consumption for a naked A1200.

posts 16