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  Topic Review (Newest First)
07-09-2020 03:54 AM
Imprezzion Well, I finally found the first game capable of hitting the 380w EVGA FTW3 limits on my Gainward lol. I run 2115-2085 depending on temps at 1.093v with a custom curve with 7800 memory and Black Desert Online on the "screenshot only" Ultra mode actually manages to tap the power limit from time to time. It usually runs 110-115% but some areas hit the limit slightly going as high as 131% and then throttling to 2025-2040 @ 1.043v shortly.

I mean, superposition always hit the limit for me but 3dmark or other games didn't so I figured I was fine but..

Well, might switch back to HOF XOC 1.125v 2145-2115Mhz again lol.
07-08-2020 05:43 PM
J7SC
Quote: Originally Posted by Laithan View Post
Gotcha... I still may be missing something because they are using 6-pins, which I realize is almost identical to an 8-pin except for the sense pin and the additional ground but there is more of a power limit on a 6-pin vs an 8-pin because of that ground... and even if there were (3) 8-pins, that's still only over 1000watts total, still wondering where 2000watts is coming from even with these FrankenGPUs

...yeah, up to 4 x 6 pin (3x vcore, 1x vdimm). This was the first revision of EVGA's EPower board (fyi, Gigabyte also offered s.th. similar).

Bit-tech.net (2012) wrote. "According to EVGA's figures, the EPower board can run at a VCORE adjustment range of 800mV to 2000mV at a current of up to 400A, or a VDIMM adjustment range of 1000mV to 5000mV at up to 80A. To put those figures into context: EVGA recommends a 600W power supply with 42A on the 12V rail per EPower board used in the system. Before you get excited about the potential of the board, there's a catch: the system is hardly plug-and-play. Those who have bought the board are expected to solder it directly to the motherboard or graphics card of their choice, replacing the existing VRMs with a connection to the EPower board. With the installation instructions (PDF) advising users to cut PCB traces to disable on-board regulator modules, it's a hair-raising - and warranty-trashing - experience."
07-08-2020 05:18 PM
0451 I’ve melted a Cable Mod 8 pin when pushing about 450-500 watts into a Vega 64 and that is definitely under 324 watts per connector.
07-08-2020 04:40 PM
Laithan
Quote: Originally Posted by cisco150 View Post
Thanks for the reply im not sure if the voltage can be controlled thru MSI or EVGA scanner. do you know if this is possible.
Yes the voltage slider can be enabled and you can lower it that way or you can use the O/C curve to specify rough voltages @ certain clocks (Pascal+ only).
07-08-2020 04:38 PM
Laithan
Quote: Originally Posted by J7SC View Post
...if you mean the 12v PCIe connectors originally on the card, usually the 'FrankenGPU' method replaces rather than supplements them - i.e. similar to below, I have seen this mod done before in person by an XoCer...very tedious
Gotcha... I still may be missing something because they are using 6-pins, which I realize is almost identical to an 8-pin except for the sense pin and the additional ground but there is more of a power limit on a 6-pin vs an 8-pin because of that ground... and even if there were (3) 8-pins, that's still only over 1000watts total, still wondering where 2000watts is coming from even with these FrankenGPUs
07-08-2020 04:36 PM
cisco150
Quote: Originally Posted by Laithan View Post
From the peanut gallery (I'm sure this has already been discussed many times)

I admit that I haven't used one of the "2000 Watt" BIOS' and measured how much they can actually "pull" however I've done a lot of power testing with Maxwell. Regardless of the GPU on the PCB, there are simply electrical limits. I am not talking about the actual maximum limit of a single 8-pin PCI-e cable electrically (324 Watts I believe) but what I would consider a "safe" wattage to be pulling from a single PCI-e 8-pin is 200 Watts. This is factoring the PCB trace width where the power is ultimately carried. 200W is a lot of power for a single 8-pin and above what most STOCK BIOS of recent generations of GPUs would define (150W was common for a STOCK BIOS 8-pin value).

I had to struggle to find any test that would come even close to pulling 200W (even testing @ 4K) and the only real way I could get that much power to be pulled was with furmark which is of course not even close to real-world. I suspect some LN2/DICE examples w/extreme voltages may reach the power limits. Regardless of who made the GPU the 8-pin PCI-e power cable is an industry standard. The PCI-e slot itself can provide up to 75W of additional power. The traces/components on the PCB itself will of course vary.

With a maximum of 200W per 8-pin PCI-e:
8-pin PCI-e cable x 1 + the PCI-e slot itself = 275W of power (safe maximum)
8-pin PCI-e cables x 2 + the PCI-e slot itself = 475W of power (safe maximum)
8-pin PCI-e cables x 3 + the PCI-e slot itself = 675W of power (safe maximum)


So let's just say for giggles that we went with the maximum power an 8-pin can electrically carry which is 324 Watts.. then you would have:
With a maximum of 324W per 8-pin PCI-e:
8-pin PCI-e cable x 1 + the PCI-e slot itself = 399W of power (electrical maximum)
8-pin PCI-e cables x 2 + the PCI-e slot itself = 723W of power (electrical maximum)
8-pin PCI-e cables x 3 + the PCI-e slot itself = 1047W of power (electrical maximum)

So where is this magical 2000W coming from anyway
It may be defined in the BIOS as 2000W (might as well put 1 million then) but I don't think it is eletrically possible by both the physical wires themselves or the traces on the PCB.

Also, the question of running a GPU 24x7 is not of power it is of voltage. I would not recommend running that XOC BIOS 24x7 because of the increased voltage (unless you back it down for daily use via curve) not because of the power as it only pulls what it needs when it is needed. The actual power utilized depends on the workload presented to the GPU.

Personally as long as I could have profiles configured with different voltages for different needs then I would keep the XOC BIOS flashed at all times and just use software to limit the voltage for gaming. When benchmarking then load the max voltage profile
Thanks for the reply im not sure if the voltage can be controlled thru MSI or EVGA scanner. do you know if this is possible.
07-08-2020 03:02 PM
J7SC
Quote: Originally Posted by Laithan View Post
Do you know if these replace the existing PCI-e connectors or compliment them?
...if you mean the 12v PCIe connectors originally on the card, usually the 'FrankenGPU' method replaces rather than supplements them - i.e. similar to below, I have seen this mod done before in person by an XoCer...very tedious

07-08-2020 02:42 PM
kithylin
Quote: Originally Posted by Laithan View Post
Do you know if these replace the existing PCI-e connectors or compliment them?
I haven't done this method myself. I've only seen it demonstrated in live streams and on youtube. But from what little I understand about it the zombie boards wire in directly to the board's VRM's and typically supplement the power from what we would otherwise get from the PCI-Express Power connectors. I don't think it would allow the card to draw more power over the PCIE connector it's self (when using those zombie boards). If it did then it would melt the motherboard and be counter-productive. I don't claim to understand the science behind all of that. I just know that if someone wants to get up near 2000 watts of power on a video card, that's how they do it. And those unlimited bios's that have high power limits of 2000 watts are designed specifically for that scenario / use case.
07-08-2020 02:19 PM
Laithan
Quote: Originally Posted by kithylin View Post
The bios allows it but to actually get power that high people have to solder on zombie boards for LN2 overclocking.

Do you know if these replace the existing PCI-e connectors or compliment them?
07-08-2020 02:18 PM
0451 Or they are like Buildzoid and they game on 1700x / R9 Fury while their 10900k and 2080tis are used only for benching and modding.

When I drive around in circles at the racetrack I’m not actually trying to get anywhere XD
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