I would get the EVGA SuperNOVA 850 G2 220-G2-0850-XR 80+ GOLD 850W for $110 after rebate from Newegg: https://www.newegg.com/Product/Product.aspx?Item=N82E16817438018It's a dual conversion, single 12V rail PSU. It has 4 PCI-E 8-pin slots, 4 6+2-pin PCI-E cables and two of the cables also have a 6-pin PCI-E splitter cable. |
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If you already tried different risers, cables and PCI-E slots, you can also try the card by itself or on another machine to make sure. Otherwise it sounds like a bad card. Return it or get an exchage under warranty.
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Thank you! I will try to flash the bios again now. Also when flashing the bios I'm just copying the timings that in are 2000 and pasting them in 1900, 1750, 1625 and 1500 right?
I know copying the 1750 strap to the 2000 on the 8GB 480 RX with Samsung memory works best. That's what my Asus Strix cards use. It really depends on the type of card and memory you have so you need to research what works best. Do i copy the full timings? In polaris bios editor you copy the entire value of the memory timing you want to use and replace the value in the higher frequency box/boxes so they are the same as the strp you copied. https://bitcointalk.org/index.php?topic=1901925.msg18876970#msg18876970So would I be copying the strap timing from 1500 and pasting it in to the higher frequency box/boxes above? As I said, it depends on your card and the type of memory it uses. |
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Thank you! I will try to flash the bios again now. Also when flashing the bios I'm just copying the timings that in are 2000 and pasting them in 1900, 1750, 1625 and 1500 right?
I know copying the 1750 strap to the 2000 on the 8GB 480 RX with Samsung memory works best. That's what my Asus Strix cards use. It really depends on the type of card and memory you have so you need to research what works best. Do i copy the full timings? In polaris bios editor you copy the entire value of the memory timing you want to use and replace the value in the higher frequency box/boxes so they are the same as the strp you copied. https://bitcointalk.org/index.php?topic=1901925.msg18876970#msg18876970 |
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Thank you! I will try to flash the bios again now. Also when flashing the bios I'm just copying the timings that in are 2000 and pasting them in 1900, 1750, 1625 and 1500 right?
I know copying the 1750 strap to the 2000 on the 8GB 480 RX with Samsung memory works best. That's what my Asus Strix cards use. It really depends on the type of card and memory you have so you need to research what works best. |
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Bad pools, exchanges & coin Dev's!
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The fans are typically are what goes out first. Even if it's covered under warranty you still deal with the downtime. So IMO, it's better to keep the GPU fans as low as possible and use external high volume case fans or a box fan to cool.
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Essentially you are using the computational power of your CPU, GPU or other specialized equipment to solve complex mathematical problems created by the blockchain and compensated for doing so in the currency of that blockchain. Lots of info on the web or Youtube.
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I'm pretty sure that's a myth that keeps getting re-hashed(for some reason) from the ribbon powered riser days..
(this coming from a guy that just murdered 2 cards tho.)
Usb powered risers seem to be totally independent. I've been running dual psu's for months in pretty much any fashion without issue(until now.) even non-grounded together.
Case in point: When said idiot forgot to turn off the second rig/psu before uplugging the pcie and molex from his poor 480.. that psu was powering both riser and gpu. it was also powering 1 570 the same way.. all 6 570's survived. The massive back surge when unplugging the pcie connector is (most likely) what took out the 470 that was plugged into the motherboard slot on the second rig.. yet the 480 + 470 on risers survived.(slot still works fine)
I dunno, just ordered a server psu to play with.. maybe I'll end up frying all my cards/burning the house down :/ A PCI-E 1x slot on a motherboard has three 12V lanes http://pinouts.ru/Slots/pci_express_pinout.shtmlSince a riser connected to the motherboard isn't electrically isolated, it makes sense to have the same psu that powers the motherboard also power the risers connected to it. The way he explained was that otherwise it creates a situation where the 2 PSU's fight to regulate the 12V line. https://bitcointalk.org/index.php?topic=1843586.msg18399752#msg18399752 |
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In researching the dual psu power issue i've heard some advocate powering the riser and PCI-E power connector on the card with the same PSU. Others say the psu that powers the motherboard must also power alll the risers. The slave psu should only power the PCI-E power connector on the card. Haven't found a definitive answer but it seems the people having cards die were using the slave psu to power both the risers and the PCI-E power connector on the card. https://bitcointalk.org/index.php?topic=1761303.msg17827649#msg17827649 |
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Stick with powered risers. The unpowered flat ribbon cable style wires are too thin for using under constant load. The best kind have a voltage regulator to make sure the card isn't pulling too much power from the slot. Performance wise for mining they are about the same. I prefer the six pin PCI-E power connector risers as it distributes the load over more and thicker wires.
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Has anyone else come up with a solid modded rom for this Strix 480 8gb with samsung memory? I've got 6 of them im working on, just looking for something that already has the power settings adjusted for best power usage.
BBT on youtube posted the bios from the 6 card Asus RX 480 8GB OG rig he recently built. 27.5 MH/s each and 950W at the wall for 6 cards! https://www.youtube.com/watch?v=TM8Pj_uLqxA |
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Ideally you should overclock just to the point where it's stable and without HW errors. It's not just about getting the maximum possible hashrate out of your cards. Stability and power consumption are also a factor. Typically the more more you overclock, the more power is used, so there is a diminishing return point where overclocking is just pushing the cards over their capacity for little to no benefit in your bottom line.
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Yes, overclocking too much will cause hardware errors, which will cause the miner to report more valid shares than you are actually getting credit for. Older miners like sgminer and cgminer used to report HW errors. I don't know why miners like Claymore's stopped reporting them.
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The liquid cooled AMD R9 295 X2 can do ~65 - 70 MH/s each but use 300W. If you can pick up used cards for ~$350 and have good electric rates, they are another option to expensive Nvidia 10 series cards for space limited rigs. https://youtu.be/TM8Pj_uLqxA?t=5304 |
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Radeon 4600's are almost 10 year old cards. I think the only way you will be to mine Scrypt with them is using an old version of cgminer from the early days of Litecoin. Even then don't expect to make a profit, especially mining LTC.
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