Gadgetory


All Cool Mind-blowing Gadgets You Love in One Place

Can Power cables affect GPU performance?

2017-06-28
what's up guys James $0.02 here and I often ask the audience what videos you want me to make that way I know and kind of gauge on the more popular questions I mean you asked over and over kind of which direction to make my videos now this one I've asked quite often and I didn't know the answer and I found myself actually using a config that a lot of people are wondering whether or not it's good or bad I figure we're going to talk about it and that being are you actually causing yourself any performance loss by using a single PCI Express power connector for your GPU that has a pigtail like this or should you be running independent power cables per plug harm to GPU this one's going to probably be a little bit interesting because I'm not a lesser electrical Mathemagician today's video is sponsored by LastPass and let's face it it's no fun getting locked out of your online accounts because you can't remember your password that is really irritating just ask Nick that's okay though because with LastPass you don't have to remember your passwords your mother's maiden name your security questions because it keeps everything easily accessible at your fingertips synced across all of your devices using multi-factor authentication keeping everything as secure as possible and the best part is you want to have a single password for everything because we keep forgetting them LastPass will make sure that everything is unique keeping your accounts even more secure it even has a digital safe allowing you to keep all of your VIP documents easily accessible like driver's license birth certificate passport and whatever else you could possibly think of so stop all of the insanity of forgetting all of your passwords and get LastPass for free by following the link down below so we're going to do we are going to go ahead and overclock this because I'm going to just skip the base stock test there's no point in doing stuff we want to see if there's a limitation to how much power we can pull through those cables GP voltage is that 100% power curve so it's going to go 100% sooner in the in the well curve of where the frequency is memory clock we added 400 fan speed I'm at 90% because fans will also draw voltage and power delivery will affect fans as well and since we have three fans on this I want to make sure that's not gonna be negatively affected and then we've got a power target target maxed out here at 120 so on do right now is run valley benchmark ultra settings with 8x msaa and everything is maxed out at 1080p so we're letting the graphics card just render as many frames as it possibly can right now getting 100 fifty-five of them in that part of the screen absolutely ridiculous so we'll do the test three times and then we'll a verge those numbers and see what we get silence pour here was a six thousand thirty two when we averaged to three scores that we got the sixty 2860 41 and fifty 32 we've got a six thousand and thirty three point six average score so let's go change the cables out and see if anything improved so we've got two independent power plugs in there and we've got all the settings that are still identical to what they were and I saved my profile the fans are also still running at the speed of sound basically or yeah I guess that was kind of a bad analogy for whatever there's allowed that's all the matters so we run the same three tests and see if we get any improvement fun fact though when we did our test the first time around three times in a row with this overclock and these fans at ninety percent we actually didn't get any hotter than 50 C that was pretty amazing actually not bad for air cooling go baby go okay so first test we've already seen an improvement in score not a lot but still 60 106 when we were averaging in our last test the highest score was a 60 41 so Wow okay well you know the routine we've got to go ahead and go through all three to get our average and I quite honestly wasn't really expecting that for another truth CH 6103 on the second test that's much closer in the previous test which are fluctuating upwards of what's the eight nine points that's fluctuated three okay one more test if our last test here was a sixty 93 if we average the three scores out we got a sixty 100 so that was actually an improvement just by changing the cables we didn't change any of the settings as one other test I want to do here real quick now granted this is just valley benchmark it would have been probably prudent to go through the entire testing suite but I just kind of wanted to see on the surface if there was any improvement to any of this now what I want to see is if we can actually get any better overclocking out of this the max I could get out of this before was a twenty eighty eight when I did the review so let's see if we can get anything extra out of this right now we can plan around the overclocking for a little bit here and this was a little bit of an unexpected result I could actually get the card to run 21:26 for probably about five minutes before it actually crashed which is way better than any card I've had come in here so far I was able to do including the Poseidon but then again we'll talk about that with at the ending here but we're running 2113 megahertz right here pretty stable 48 degrees C on the card yeah I Wow so who would have thought there was actually some improvements to be had right here I mean seriously I didn't I quite honestly didn't expect there to be any difference you can see there's numbers right there 21 14 actually during that test huh I'll be honest going to this video I didn't expect there to really be any sort of difference I've done a lot of testing with just using the pigtail cables with a single PCI Express power plug coming off the PSU on high-end cards like this and never saw any sort of negative results I mean we did gain a little bit more score when it came to valley benchmark and we gained one extra clock tick we'll call it once when I passed my by simply using two dedicated power cables and as a lot of factors that can actually factor into that power supply you're using how many rails it is I was kind of going by some of the research that I did prior to this video and what to expect and I didn't expect anything because of a specific comment made here in a seven-year-old Tom's Hardware thread about the difference between why there's only one extra 12-volt lead in an 8-pin power supply plug or PCI Express plug versus a six pin and how it can be double the rating from 75 watt to 150 watts with one extra 12 volt but then someone did a really good explanation of what the pin outs are and which one is sense wires and all that sort of stuff but then I said this they said that a proper 8 pin PCIe can supply a 12 volts at 11 amps with three lines or three twelve volt lines in there equaling 396 watts of power to a graphics card so that's why you can pigtail them this card is not pulling anywhere near 396 Watts but obviously we saw that it has some sort of effect maybe it's the cleanliness of the power delivery I have no idea but it did allow us to overclock a little bit farther and as we all we gained a little bit of additional score now would you have noticed any of those two things that one additional clock tick or the 70 or so extra points we saw in side of valley benchmark while gaming no probably not but it was a neat little cure meant to do so if you know more about this and why this is then let me know down in the comments below because I still am a little bit flabbergasted as to why even though one pin can supply the amount of volts and amps and watts that we need in a card like this why we saw any sort of difference whatsoever temps were the same clocks were the same but we saw an improvement with the two power cables even though the clocks were the same I couldn't I couldn't really understand that one anyway time to go guys thanks for watching if you got any more comments or any more questions you guys want me to tackle or any video topics you think would be neat for the channel you know what to do this video is derivative directly from the inbox so stemming your suggestions and as always guys I'll see you in the next video
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.