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Vega voltage

Jurrunio
By Jurrunio
in Graphics Cards
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Go to solution Solved by TheRandomness,
3 minutes ago, Jurrunio said:

Another question, what is the maximum safe voltage (assuming with stock Wraith Stealth cooler)? As far as I know, GPUs arent as good as dealing with high voltage as CPUs.

That last statement depends on the architecture. Haswell, for example, was most safe at around 1.3V, whereas Vega can go to 1.35V iirc. 

Posted

First of all, I'm talking about the architecture itself, so both integrated graphics and graphics card will be included and doesnt quite match the title of this subforum.

 

I saw people overclocking their Vega iGPUs in R3 2200G and R5 2400G, which is officially a feature for their users. However, people seem to raise the voltage from the stock 1.1V to 1.3V in order to reach 1.6GHz or more. Now, raising voltage to get more clock speed isnt out of place, but Vega is a special case. Back when Vega first appeared (V56, V64), it's known that undervolting reduces power draw, which allows more current to be sent to the core within the same power limit. Therefore, overclocking potential actually increased (unless you can get a crazy card with 800% power limit and LN2 cooling, ffs) compared to the typical overvolting for more clock speed approach (though I'm doing the same to my 1070 with that 112% power target).

 

My question is that, shouldnt people undervolt their Vega iGPUs instead rather than overvolting them? CPUs have power limits, the same goes to APUs. Wouldnt the same overclocking tactics on Vega card apply to Vega iGPU?

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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Only reason people are overvolting Vega iGPU without a thought compared to Vega cards is because from the factory, Vega cards are overvolted to make sure as many chips as possible are functional for use.

USEFUL LINKS:

PSU Tier List | F@H stats

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9 minutes ago, TheRandomness said:

Only reason people are overvolting Vega iGPU without a thought compared to Vega cards is because from the factory, Vega cards are overvolted to make sure as many chips as possible are functional for use.

Another question, what is the maximum safe voltage (assuming with stock Wraith Stealth cooler)? As far as I know, GPUs arent as good as dealing with high voltage as CPUs.

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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Posted
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3 minutes ago, Jurrunio said:

Another question, what is the maximum safe voltage (assuming with stock Wraith Stealth cooler)? As far as I know, GPUs arent as good as dealing with high voltage as CPUs.

That last statement depends on the architecture. Haswell, for example, was most safe at around 1.3V, whereas Vega can go to 1.35V iirc. 

USEFUL LINKS:

PSU Tier List | F@H stats

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