CAIRNSMORE1 DUAL AND SINGLE VERSIONS

[yohan]

The order book has opened for Cairnsmore1 single and dual versions. We will ship these from July but are taking pre-orders now and there is a launch discount on orders placed before the end of June.

Picture is quad Issue1. Shipping version is Issue 1.1.

Dual version GBP £400 / US $640 / 520€ (discounted GBP £300 / US $480 / 390€).

Single version GBP £300 / US $480 / 390€ (discounted GBP £250 / US $400 / 325€)

More detail on http://www.enterpoint.co.uk/cairnsmore/cairnsmore1.html.

Yohan

[dust]

Dual version GBP £400 / US $640 / 520€ (discounted GBP £300 / US $480 / 390€)

The other thread implied you were selling the quad version for $640.  The unit pictured also looks like a quad chip design.  Is there a mistake?

[yohan]

That is a picture of quad. We have not built a dual or a single as yet. The $640 for the quad is only until the end of June.

[dust]

That is a picture of quad. We have not built a dual or a single as yet. The $640 for the quad is only until the end of June.

Thanks, I misread and was confused by the full price of the dual equaling the discounted price of the quad.

[fuuka]

Something like 800-1000Mh/s on the quads?

[ice_chill]

That's £300, but on top there's VAT to pay ? so £360 for around 400Mhash ?

[bitscoins]

Power consumption?
If a single chip absorbs 12 x 1.2A, about 15W x 4= 60W ? and remain all the components?

[Cablez]

Have you guys actually run a Bitcoin bitstream on these yet?

I find it very hard to do a pre-order without even ballpark specs from a working unit.

[yohan]

The isn't as cut down as we might have achieved with a fully optimised design but the upside is the standard PCB between all of the Cairnsmore1 variants and common components. We also get to test one PCB design for three products. With the sectioned power supply approach of the board we do get to leave off the 12A regulator circuits when a FPGA position isn't used. It's also entirely possible that the dual and single options will return a slightly higher performance per FPGA due to the same PCB taking less heat.

We could also do things like remove the clock generator and some of the power options to save a bit more but we have left those for flexibility. There isn't much we could save on the PCB by doing custom PCBs for duals or singles. The numbers that we are building the quad in gives us a good price on a PCB that was engineered in the first place to be cost effective whilst also designed for performance. Once we have the performance numbers I hope that will be proven out in hard facts.

Yohan

[dirtycat]

interested... when I see specs 

[bulanula]

Have you guys actually run a Bitcoin bitstream on these yet?

I find it very hard to do a pre-order without even ballpark specs from a working unit.

Well, they got enough pre-orders from the Quad boards, so i guess thats why they feel they can offer pre-orders on these. They have designed and manufactured a test batch which they will be testing tomorrow, in like 3 weeks? maybe 2?

Great stuff, i have a batch pre-ordered and for me them being in the UK is a huge benefit over shady companies like BFL, these guys have been registered in the UK for 20 years!

Why do you consider BFL as being "shady"

I really don't understand. They have 10 years experience in FPGAs too.

Only disadvantage is high UK VAT import duty cost ...

[DILLIGAF]

Have you guys actually run a Bitcoin bitstream on these yet?

I find it very hard to do a pre-order without even ballpark specs from a working unit.

Well, they got enough pre-orders from the Quad boards, so i guess thats why they feel they can offer pre-orders on these. They have designed and manufactured a test batch which they will be testing tomorrow, in like 3 weeks? maybe 2?

Great stuff, i have a batch pre-ordered and for me them being in the UK is a huge benefit over shady companies like BFL, these guys have been registered in the UK for 20 years!

Why do you consider BFL as being "shady"

I really don't understand. They have 10 years experience in FPGAs too.

They may have 10 years in the business but the reason I have always thought they were shady is money first then sometime in the future we will ship you boards and from their track record so far can't even meet the shipping date delays shown on their web site 6 months into it. These boys here when I pre-ordered sent me back email confirming the pre-order and saying when your boards are ready to ship we will bill you, the way it should be done IMHO..

Have you guys actually run a Bitcoin bitstream on these yet?

I find it very hard to do a pre-order without even ballpark specs from a working unit.

Well they say they are going to be similar to the Icarus boards in performance and hopefully once tested it is confirmed so perhaps even more than that if they get ahold of buddy to work something out with to use it who has the 245mh/s bitstream for them same chips.

Quad version - 4 x Spartan(TM)-6 XC6SLX150 FPGAs wired like 2 sets of Icarus board (to be confirmed by testing). Icarus bitstream compatible (to be confirmed by testing).

[Syke]

Why do you consider BFL as being "shady"

I really don't understand. They have 10 years experience in FPGAs too.

Only disadvantage is high UK VAT import duty cost ...

You're joking, right?

Let's search https://wyobiz.wy.gov/Business/ViewCertificate.aspx for their business standing:

Name:    BF Labs Inc.    Status:    Inactive - Administratively Dissolved (No Agent)

[stcupp]

Power consumption?
If a single chip absorbs 12 x 1.2A, about 15W x 4= 60W ? and remain all the components?

I think you got your numbers mixed up there its 1.2v @ 12A. 12A is just how much the power supply can feed to the FPGA.... How much the FPGA actually uses depends on a lot of factors such as clock speed, the bitstream, I/O's, and many more.

[yohan]

This is one big difference that you will find with FPGAs and a big advantage over GPUs especially when loading isn't constant for whatever reason. A XC6SLX150 FPGA can run from a few hundred mA when an easy design is loaded or throughput is reduced. The actual current depends highly on the clocking rates and the design loaded. From what I have seen the best GPUs still take about half the power when lightly loaded.

We selected 12A capability given what other boards seem to use i.e. 8-10A. Runnning in the 8-10A zone also works with our regulator choice and it is in a better efficiency band than when running at 12A.

In the unlikely occurance of a fault our sectioned power also allows a faulty section to be turned off and also limits damage should a short occur. It would be much worse if we had a single 48A supply and that got shorted also taking down the whole board at the same time. 48A tends to vapourise tracks and do significant damage to anything on the current path.

Yohan

[abeaulieu]

Waiting for some hashing numbers to be posted...

[subbed]

[DiabloD3]

This is one big difference that you will find with FPGAs and a big advantage over GPUs especially when loading isn't constant for whatever reason. A XC6SLX150 FPGA can run from a few hundred mA when an easy design is loaded or throughput is reduced. The actual current depends highly on the clocking rates and the design loaded. From what I have seen the best GPUs still take about half the power when lightly loaded.

We selected 12A capability given what other boards seem to use i.e. 8-10A. Runnning in the 8-10A zone also works with our regulator choice and it is in a better efficiency band than when running at 12A.

In the unlikely occurance of a fault our sectioned power also allows a faulty section to be turned off and also limits damage should a short occur. It would be much worse if we had a single 48A supply and that got shorted also taking down the whole board at the same time. 48A tends to vapourise tracks and do significant damage to anything on the current path.

Yohan

A lot of people are requesting this feature, and I hope you think about this for future products: use programmable VRMs. A lot of people want to undervolt their FPGAs to increase efficiency at the end of their effective mining lives and it would increase sales over the BFL juggernaut.

[DeathAndTaxes]

Who would buy a single or double?

Quad - $640 = $160 per FPGA (however many MH/s tht is)
Double - $480 = $240 per FPGA  (50% higher cost per MH/s)
Single - $400 = $400 per FPGA (150% higher cost per MH/s)

Am I missing something?

[nedbert9]

Who would buy a single or double?

Quad - $640 = $160 per FPGA (however many MH/s tht is)
Double - $480 = $240 per FPGA  (50% higher cost per MH/s)
Single - $400 = $400 per FPGA (150% higher cost per MH/s)

Am I missing something?

Quad - $640 = Temporary pricing.  Ends May.
Double - $480 = Standard price
Single - $400 = Standard price

[DeathAndTaxes]

Quad - $640 = Temporary pricing.  Ends May.
Double - $480 = Standard price
Single - $400 = Standard price

You sure about that?

From OP

Dual version US $640 (discounted  US $480)
Single version US $480 (discounted US $400)

I look the discounted to be pre-order special pricing so $640, $480, $400 is apples to apples right?