XBTec Pacific V3 3.2Th, 0.8W/Gh - page 4.

dogie

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dogiecoin.com

Quote from: klondike_bar on October 31, 2014, 06:04:03 AM

Quote from: dogie on October 31, 2014, 04:50:36 AM

Quote from: seriouscoin on October 22, 2014, 12:26:57 PM

why small fans? so loud

If you went with two (maybe 3) large fans, the failure of ANY of those fans could cause catastrophic overheating as BE200 doesn't have temperature sensors. By having 6, a fan can fail without problem. tldr, redundancy.

quality fans dont crap out in my experience - and the AM Prisma only uses 1 fan itself anyways

I'm giving you the reason the manufacturer chose 6 smaller fans, you can argue it all you want.

klondike_bar

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ASIC Wannabe

Quote from: dogie on October 31, 2014, 04:50:36 AM

Quote from: seriouscoin on October 22, 2014, 12:26:57 PM

why small fans? so loud

If you went with two (maybe 3) large fans, the failure of ANY of those fans could cause catastrophic overheating as BE200 doesn't have temperature sensors. By having 6, a fan can fail without problem. tldr, redundancy.

quality fans dont crap out in my experience - and the AM Prisma only uses 1 fan itself anyways

dogie

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dogiecoin.com

Quote from: seriouscoin on October 22, 2014, 12:26:57 PM

why small fans? so loud

If you went with two (maybe 3) large fans, the failure of ANY of those fans could cause catastrophic overheating as BE200 doesn't have temperature sensors. By having 6, a fan can fail without problem. tldr, redundancy.

XBTec

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Quote from: shangri on October 22, 2014, 08:50:51 PM

Quote from: daddyfatsax on October 22, 2014, 01:14:24 PM

So how did you get to 3.2 TH/s from 2 Prismas? From your pic you have 16 boards, each Prisma shows up as 8. Right now people are only getting 1440 GH/s per device. So you guys must be overclocking these pretty high.

Cooling and psu it's very important, if you use psu with stable 12v line and heatsink with square around 4000 cm^2 chip works without problem on frequency 270 MHz it's not overclocking. We geting 3.5 thash with same power consumption on 290 MHz when outside was very cold. Maybe prisma couldn't work stable with computer PSU, because after losing on the cables voltage on conectors can be 11.4v - 11.5v it's not important when you use dc\dc, but then we talk about string design it's very important, because voltage separate between chip. Maximal what possible getting from 1 boards around 480 Ghash if use higher voltage.

That is right, when temperature in Shenzhen dropped down o 23 C degrees, we've got better hashrate.
It seems like causality, not just correlation.

We didn't try to use mine on 290Mhz, nice idea. We gonna try today. Thank you for advice Wink

shangri

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Quote from: daddyfatsax on October 22, 2014, 01:14:24 PM

So how did you get to 3.2 TH/s from 2 Prismas? From your pic you have 16 boards, each Prisma shows up as 8. Right now people are only getting 1440 GH/s per device. So you guys must be overclocking these pretty high.

Cooling and psu it's very important, if you use psu with stable 12v line and heatsink with square around 4000 cm^2 chip works without problem on frequency 270 MHz it's not overclocking. We geting 3.5 thash with same power consumption on 290 MHz when outside was very cold. Maybe prisma couldn't work stable with computer PSU, because after losing on the cables voltage on conectors can be 11.4v - 11.5v it's not important when you use dc\dc, but then we talk about string design it's very important, because voltage separate between chip. Maximal what possible getting from 1 boards around 480 Ghash if use higher voltage.

daddyfatsax

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Anger is a gift.

So how did you get to 3.2 TH/s from 2 Prismas? From your pic you have 16 boards, each Prisma shows up as 8. Right now people are only getting 1440 GH/s per device. So you guys must be overclocking these pretty high.

seriouscoin

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why small fans? so loud

Biffa

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What size are those fans? 60mm?

XBTec

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Hi community,

Newest bitcoin miner block erupter has been outputted these days.
Very limited quantity.
If someone wants to see unit by own eyes, welcome to Shenzhen.

Chipset: AM BE200
Hashrate: at least 3.2Th
Power consumption from the wall: 2500 Watt
Power consumption per Gh: ~0.79Watt
Dimensions: 4U rack mount case.
Weight: 18kg

First batch: 10th November
Price: US $1750 with worldwide shipping by DHL.

Topic: XBTec Pacific V3 3.2Th, 0.8W/Gh - page 4. (Read 11710 times)