Problem with GPU voltage

Thimblewad · Oct 14, 2016

HarvesterOfSorrow said:
@Thimblewad
Can you say what is voltage thats not safe to exceed on HD 7970 cards (and withCHL822x VRM overall)
It seems that my 1200MHz did crash with 1.250V My target was 1200MHz-1225MHz.

If you crash even with bumping the voltage up, you have reached the treshold of the card (maybe VRM, maybe chip). My card on 1.281 V doesn't go over 63 °C and the VRMs go to about 65 °C, so I think it's safe to say you should go back to the last stable result you've had.

EDIT: This is what I get after 5 loops of Unigine Heaven on Extreme HD preset

Rangerjr1 · Oct 15, 2016

HarvesterOfSorrow said:
@Thimblewad
Can you say what is voltage thats not safe to exceed on HD 7970 cards (and withCHL822x VRM overall)
It seems that my 1200MHz did crash with 1.250V My target was 1200MHz-1225MHz.

Ive gone as far as 1.4V on a watercooled 7970, and it lived on just fine, but for air i dont see it as viable to go beyond 1.2-1.25 depending on your cooling.

HarvesterOfSorrow · Oct 15, 2016

Rangerjr1 said:
Ive gone as far as 1.4V on a watercooled 7970, and it lived on just fine, but for air i dont see it as viable to go beyond 1.2-1.25 depending on your cooling.

Would it be ok, to go for 1.3V if temps are fine with aircooler.

Thimblewad · Oct 15, 2016

HarvesterOfSorrow said:
Would it be ok, to go for 1.3V if temps are fine with aircooler.

Please, for your own and the GPUs good, don't go that high. Your GPUs VRMs are getting very hot (see my post #26), you probably don't have proper VRM cooling and your temperatures will jump. What is your power limit setting on 1.250 V and 1200 MHz when you get crash?

↓ What I said before ↓

Thimblewad said:
If you crash even with bumping the voltage up, you have reached the treshold of the card (maybe VRM, maybe chip). My card on 1.281 V doesn't go over 63 °C and the VRMs go to about 65 °C, so I think it's safe to say you should go back to the last stable result you've had.

HarvesterOfSorrow · Oct 15, 2016

Thimblewad said:
Please, for your own and the GPUs good, don't go that high. Your GPUs VRMs are getting very hot (see my post #26), you probably don't have proper VRM cooling and your temperatures will jump. What is your power limit setting on 1.250 V and 1200 MHz when you get crash?

↓ What I said before ↓

The cards VRM have proper cooling (heatsinks + fan) and i tried 1200MHz with 1.260V and it passed Heaven 1.5 hour loop. I think it didnt made difference with 1.225V and 1.250V because my card (as most HD 7970) have vdroop, so even i set my voltages to 1.260V, voltages are hoovering below setted voltage.

Thimblewad · Oct 15, 2016

HarvesterOfSorrow said:
The cards VRM have proper cooling (heatsinks + fan) and i tried 1200MHz with 1.260V and it passed Heaven 1.5 hour loop. I think it didnt made difference with 1.225V and 1.250V because my card (as most HD 7970) have vdroop, so even i set my voltages to 1.260V, voltages are hoovering below setted voltage.

Well, in that case, I suggest you keep the temperatures of the chip and VRM below 80 °C and you should be fine.

System Name	Thermaltake
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System Name	Amadeus
Processor	AMD Ryzen 9 5900X
Motherboard	Asus X570-F
Cooling	EK CR360
Memory	32Gb DDR4 @3600MHz
Video Card(s)	RTX 3080 10Gb
Storage	1Tb NVMe, 2Tb NVMe, 2x 2Tb USB HDD
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System Name	Thermaltake
Processor	AMD Ryzen 5 5800X3D @ 4.60 GHz
Motherboard	Gigabyte B550 Aorus Elite V2
Cooling	Thermalright Peerless Assassin
Memory	32 GB Crucial Ballistix @ 3600 MHz CL16
Video Card(s)	XFX 319 Merc 6800 XT
Storage	Kingston 256GB SSD \| Kingston 240GB NVMe \| Samsung 1TB NVMe \| Samsung F3 1TB HDD \| Barracuda 2TB HDD
Display(s)	34" ultrawide LG 34GL750B 144hz 1ms \| 55" LG UR91 4k@60Hz
Case	Phanteks Eclipse P400
Audio Device(s)	ALC 1220 120dB SNR HD Audio
Power Supply	Thermaltake GF1 850 W - 80 Plus Gold
Mouse	Logitech G502 HERO Lightspeed
Keyboard	Asus TUF Gaming K3
Software	Windows 11 Pro x64

System Name	Amadeus
Processor	AMD Ryzen 9 5900X
Motherboard	Asus X570-F
Cooling	EK CR360
Memory	32Gb DDR4 @3600MHz
Video Card(s)	RTX 3080 10Gb
Storage	1Tb NVMe, 2Tb NVMe, 2x 2Tb USB HDD
Display(s)	Samsung C32JG50 & HP24y
Case	Lian Li O11 Dynamic
Audio Device(s)	SoundBlaster G6 with Sennheiser Game One
Power Supply	EVGA G2 750W
Mouse	Logitech G603
Keyboard	SteelSeries Apex M500
Software	Windows 11 Pro 64-bit
Benchmark Scores	TimeSpy: 16 201