X6500 Custom FPGA Miner

[hashking]

Are you getting any long poll errors. 

[TheSeven]

Are you getting any long poll errors. 

Long poll errors with MPBM on GPUMAX are a known issue. However I can't test things myself because I don't have a GPUMAX account, and there seems to be a months-long backlog on invites.
However, judging from other people's results, it looks like that long polling error is not critical, and does not mean that long polling doesn't work at all. There are only very brief time frames, during which it fails (when GPUMAX is trying to re-route your LP request internally).

[jav]

Looking at the thermal data of the FPGA, I'd say that a heatsink temperature of 50°C and a board temperature of 60°C should be perfectly fine. 10°C more might cause invalids but shouldn't really hurt it. So as long as the oil stays around 50°C it should be fine.

Great, good to know. I now tried it without a fan for a day and the temperature has stabilized at around 51 °C. In that time it has produced 2 invalid shares (showing as 0.0%).

You beat me to it, I just received my tech grade mineral oil yesterday and the rest of my parts should arrive by the end of the week.

Cool to hear that you are giving it a shot as well. Looking forward to see your finished setup!

Awww you know that you will end up with oil on you desks? And u lost your warranty btw.

Good thing the X6500 doesn't have a warranty to begin with. =)

It's called cappilar effect .... i did that once with my computer and the oil crawled up the mouse cable and after a short while my mouse began to bleed oil ...

Yes, I was wondering if capillary effect would be a problem. That's why I run the cables up the wall for a bit before going down again. I would think that the effect isn't strong enough to overcome that kind of distance. But only time will tell.

I would think that in the case of a mouse cable the risk is higher, because by using the mouse, the cable is moved back and forth sometimes and helping in transporting oil where it shouldn't be. I think the situation here is much better, as everything is very static.

[fizzisist]

In the last couple weeks, we've been experimenting with different FPGA core voltages (VCCINT). Our measurements have shown that on most rev3 boards, performance can be increased significantly by slightly increasing this voltage. Because of this, all rev3 boards starting today will be shipped with VCCINT set to 1.23V (instead of the original 1.20V). This applies to all boards shipped on or after 3/29/2012.

While this increases the board's power consumption slightly (data here), it also increases the potential limit on clock rate, which is especially useful with the new "overclocker" bitstreams.

If anyone would like to increase the core voltages on an older board, it simply means swapping two resistors (R2 and R8). You can either attempt this yourself or send it back to us and we'll do the work free of charge. We only ask that you pay the return shipping charge.

[freshzive]

wow, didn't realize there was a fizzisist fork of the modular miner....runs much more smoothly, way fewer stales on gpumax.

cheers

[TheSeven]

wow, didn't realize there was a fizzisist fork of the modular miner....runs much more smoothly, way fewer stales on gpumax.

cheers

I'm slightly puzzled...

Fizzisist's fork only has some minor overclocking-related changes, and is based on a discontinued version?

[freshzive]

wow, didn't realize there was a fizzisist fork of the modular miner....runs much more smoothly, way fewer stales on gpumax.

cheers

I'm slightly puzzled...

Fizzisist's fork only has some minor overclocking-related changes, and is based on a discontinued version?

Yup. After running for a while, stales went back up... Guess it was just some early luck. Oh well.

[fizzisist]

wow, didn't realize there was a fizzisist fork of the modular miner....runs much more smoothly, way fewer stales on gpumax.

cheers

I'm slightly puzzled...

Fizzisist's fork only has some minor overclocking-related changes, and is based on a discontinued version?

Yup. After running for a while, stales went back up... Guess it was just some early luck. Oh well.

Heh, yeah, that would have been really odd...

TheSeven's master branch should really have all the features of mine now, and have the awesome web UI, so I strongly recommend that.

[fpgaminer]

X8000 Sneak Peak

A Sneak Peak at the first 3MH/s/$ FPGA Miner!

Howdy guys. Fizzisist asked me to fill you guys in the upcoming design for the X8000, code named Deep Purple. This is the next revision of our board. It's a little ways off from being complete, since we plan to revamp the USB interface to handle the increased hashing performance. But I've got a picture from li_gangyi of the prototype:

X8000: Deep Purple Prototype:




Preliminary Details:

• 1.8 GH/s guaranteed, 2.4 GH/s typical.
• $595.99 USD + Shipping/Tax.
• Dual Virtex-6 FPGAs.
• USB interface for configuration and mining communication.
• Power supplied through 4-pin Molex connector or 5.5 x 2.1 mm barrel connector (wall wart style).
• 50 W power consumption measured at 2.2 GH/s (more measurements pending).
• Independent protection fuses on each power connector.
• JTAG available for development and debugging (headers are not populated by default).
• Independent temperature monitoring for each FPGA.
• Heatsink mounting holes, compatible with many heatsinks designed for the Northbridge chipset.
• Additional clearance to allow for larger heatsinks.
• 3-pin headers to power 2 standard 12V fans.
• Draws from the 12V supply at the Molex connector.
• LEDs to indicate that the FPGAs are configured properly.
• Mounting hole size diameter increased to allow for #6 size screws.
• 98 x 85.5 mm (3.86 x 3.37 inch) overall size

Again, this is just a prototype, but we're hoping to cram a few more features in there in the weeks following April 1st.

[nedbert9]

funny

[roomservice]

you almost got me haha

[needbmw]

following April 1st.

LOL

[terrytibbs]

You got me. I confess.

[bulanula]

Almost got me a heart attack. A FPGA like that really will change the mining landscape.

Happy now that my GPUs are still going to be humming happily after all.

[shackleford]

That was just mean.... Respect

[Hawkix]

X8000 Sneak Peak

A Sneak Peak at the first 3MH/s/$ FPGA Miner!

X8000: Deep Purple Prototype:

Preliminary Details:

• 1.8 GH/s guaranteed, 2.4 GH/s typical.
• $595.99 USD + Shipping/Tax.

Must be FAKE. All seems legit, but you made a mistake which reveals you - I never saw purple board from any suplier .. ![/list]

[kakobrekla]

Must be FAKE. All seems legit, but you made a mistake which reveals you - I never saw purple board from any suplier .. !

[tgmarks]

You had me, I was almost ready to send in my pre-order

[BitBlitz]

I almost spit coffee on my monitor!  Too funny!

[TheSeven]

X8000 Sneak Peak

A Sneak Peak at the first 3MH/s/$ FPGA Miner!

X8000: Deep Purple Prototype:

Preliminary Details:

• 1.8 GH/s guaranteed, 2.4 GH/s typical.
• $595.99 USD + Shipping/Tax.

Must be FAKE. All seems legit, but you made a mistake which reveals you - I never saw purple board from any suplier .. ![/list]

...even very popular boards: