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| GTX1070 Founders - no Memory Voltage, with external Memory-Power all fine https://vlab.su/viewtopic.php?f=48&t=106067 |
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| Assassin [ 19 авг 2020, 21:08 ] | |
| Заголовок сообщения: | GTX1070 Founders - no Memory Voltage, with external Memory-Power all fine |
Hello there, i have here a GTX1070 with an error in memory power supply. i have already testet the whole card - direct connect a external Powersupply that deliver 1,5V with 20A - and card works fine with it. i have already swap the R33 coil, the dual N Mosfet and the PWM Controller also - withaut any change in error. Controller is a default Founders memory controller, a 7J=3D (7J=xx) - with is a renamed RT8816A controller. i have already checked near all things around the controller. No shorts in any capacitor, no shorts in Mosfet gates. Measurements are: PVCCC: 5V EN: 1.8V RTon: 550 kΩ against VIN (12V) PSI: 0.8V VREF: 2.0V VRefIN: 1.52V OCSET: 77kΩ VID: 1.8V (no PWM) Bootstrap C: 97nF RGND: 0.2Ω against ground VSNS: 33Ω against Ground or 0,2Ω against VOut (memory voltage after R33 coil) i have also dissconect the OCSET/SS pin from external SoftStart resitor/capacitor, and it will only rise to 163mV, but in datasheet it should be rise to over 2V. so i think the controller is in error state directly after start. Both gates from dual N mosfet is forcfully held low so what can be happened here? |
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| Assassin [ 23 авг 2020, 23:26 ] | |
| Заголовок сообщения: | Re: GTX1070 Founders - no Memory Voltage, with external Memory-Power all fine [РЕШЕНО] |
no one hase this error befor with a Founders? or here - a Palit GTX1070 SuperJetStream |
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