TinyChipHub Zyber 8G

This is the big brother of the miner I actually run. I’ve got Zyber 8S units on the bench and I rate them, so when people ask whether the 10 TH/s Zyber 8G is the obvious upgrade, the answer has shifted. It was always the better machine on paper; it used to be the harder one to justify on price, and that second part has quietly stopped being true now the price has come down a long way. Better machine, and no longer the dear one.

The take

TinyChipHub is the shop most Bitaxe people know for boards and cooling parts, and the Zyber line is their own hardware. The 8S I run is the value pick in it - eight chips, ~6.4 TH/s, around £210. The 8G is the same family scaled up: eight BM1370 chips, a heavier six-heatpipe copper-aluminium heatsink, and a real 10 TH/s. Where it gets interesting is that the 8G fixes the 8S’s most annoying quirk. On the 8S the headline hashrate is an overclock toggle you have to flip; on the 8G, owners report it holds close to the rated 10 TH/s straight out of the box. One independent reviewer measured a 1-day average near 10 TH/s at about 137 watts on his desk, which is not only the number on the box but better efficiency than the box claims - roughly 13.7 J/TH against a rated 18, and comfortably clear of the 8S’s thirstier ~21.9.

So what changed. Price. At launch the value case against it was the one every reviewer and every r/BitAxe thread made, and it was hard to argue with: near $1,299, you could field three NerdQaxe++ boards for something like 14 to 18 TH/s instead of 10. That criticism has aged out. The 8G has fallen to around $309 direct, where a single NerdQaxe++ costs more for less than half the hashrate - so the 8G is now the cheaper terahash, not the dearer, and it’s one tidy box rather than three units to site, cable and keep cool. The one caveat is where you buy: the direct TinyChipHub price is the good one, and the reseller listings that used to mark it up have largely dried up.

What the numbers actually mean

Ten TH/s buys roughly a 1-in-1,800 shot at a block in any given year against the current ~946 EH/s network - better odds than the 8S’s ~1-in-2,800, still a proper long shot you run for the lottery ticket and the learning, not the income. Efficiency is the genuine good-news story: the ~13.7 J/TH owners see at stock is strong for this class and a clear step up from the 8S. At the rated 180 watts you’re looking at roughly 43p a day on a cheap overnight tariff, less if yours settles nearer the ~137 watts the reviewer measured.

The firmware is the same AxeOS-family lineage as the 8S and the Bitaxe, so if you’ve tuned one of those the Bitaxe overclocking principles carry straight over, eight chips at a time. TinyChipHub say their own labs push the 8G to 12-13 TH/s by lifting frequency and voltage in the web UI - I’d treat that as a maker claim rather than a promise, since I couldn’t pin down an independent test confirming the top figure, and there’s a real caveat attached. An owner running near 190 watts reported the bundled power supply’s leads warming up close to the pack’s safety margin, so the consensus is clear: if you plan to overclock hard, upgrade the PSU first. At stock 180 watts nobody’s flagging that.

On noise and heat the picture is mostly reassuring with one honest asterisk. Thermally it looks well sorted - that big copper-aluminium heatsink held the reviewer’s unit around 51C on the ASICs in a home office, with the voltage regulators near 63C. Noise is the fuzzy bit: TinyChipHub’s own materials quote anywhere from 36 dB to about 50 dB at normal settings and nearer 55 dB when you overclock into custom mode, so I wouldn’t hang a single number on it. Quiet at stock, audible when you push it, is about as far as I’ll commit without metering one myself. It keeps the 8S’s nice touches too - the 1.9-inch colour screen cycling live hashrate, temperature and power - and connects over Wi-Fi through the onboard ESP32, with no Ethernet port out of the box, which is normal for these boards.

Who should get one - and who shouldn’t

Get the 8G if you want one clean 10 TH/s box rather than a small cluster, if you’re moving up from a Bitaxe or a Zyber 8S and you like the family, or if a heavy heatsink and a tidy desk unit matter to you more than squeezing the most terahash out of every pound. The out-of-the-box hashrate and the better-than-rated efficiency are real strengths, and TinyChipHub selling every spare part on the same site is worth more than people think when a fan dies in year two.

Don’t get one if you need a big-brand name and a local warranty desk - it’s a small Hong Kong-registered shop, and increasingly a buy-direct one now the reseller listings have thinned. Don’t get one expecting to overclock hard on the stock supply without spending a bit more on a PSU. And if you want a sealed, silent appliance for a living-room shelf, this isn’t it - it’s an open-firmware-family miner with fans and a screen on show. I run the cheaper sibling and I’m glad I do; but at what the 8G now costs direct, the step up to a tidy 10 TH/s box is far easier to recommend than it was at launch.