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-   -   Did Biostar's X470GT8 just make one of the best X470 boards VRM wise? (https://www.overclock.net/forum/11-amd-motherboards/1705920-did-biostars-x470gt8-just-make-one-best-x470-boards-vrm-wise.html)

Solarity 08-15-2018 01:08 PM

Did Biostar's X470GT8 just make one of the best X470 boards VRM wise?
 
I have been reading up on VRMs a lot the past few days and from all the sites and forums I am read it seems a bit surprising that it looks like it has a very decent VRM:

Phases: 4 + 2
PWM Controller: IR35201
CPU: 8x IR3555 interleaved with IR3599
SOC: 4x IR3555 interleaved with IR3599

I am still leaning learning the basics of the VRM, though it seems like a decent board. Granted I can't really speak for the VRM heat sink as that seems like a plague for most of the boards these days. Also the caps are only rated at 5k, though from what I read 10k and 12k caps are a bit overkill and a "cash crab" according to Buildzoid.

sources:
https://www.overclock.net/forum/13-a...l#post27413841
https://www.hardwareluxx.de/communit...e-1155146.html

Again this is pertaining to the just the VRM. Granted the board does have a lot of nice features that more expensive boards have. The user and "pro" reviews where they exist seem pretty positive. I am feeling anti-establishment lately.

miklkit 08-15-2018 03:57 PM

Dunno about the GT8, but my GT7 is a year old and running just fine. The vrm heat sink is just a lump of aluminum but I have never seen the vrms go over 60C @ 1.394v.



A quirk is that the case fans are tied to the system sensor instead of the cpu sensor. This means that while stress testing the cpu fans are wound up while the case fans are idling, but when gaming the cpu fans are coasting and the case fans are pushing lots of cool air into the gpu. My Fury rarely touches 60C.

CJMitsuki 08-15-2018 05:29 PM

Quote:

Originally Posted by miklkit (Post 27576686)
Dunno about the GT8, but my GT7 is a year old and running just fine. The vrm heat sink is just a lump of aluminum but I have never seen the vrms go over 60C @ 1.394v.



A quirk is that the case fans are tied to the system sensor instead of the cpu sensor. This means that while stress testing the cpu fans are wound up while the case fans are idling, but when gaming the cpu fans are coasting and the case fans are pushing lots of cool air into the gpu. My Fury rarely touches 60C.

60c on your VRMs? That sounds a bit high, I have never seen mine hit 40c even when benching on 1.5v+. You must have some really quiet fans in your case. Has your cpu ever become unstable when running high loads? My system right now is running 4.4ghz on all cores during full load and 1-4 cores on 4.45-4.5ghz during normal tasks and after an hour and 15 min of monitoring the VRM maxed at 30c and 30 min of that was near full load testing memory. I havent ever seen the cpu behavior at higher VRM temps so I am curious as to how it reacts during a stress test.

The Pook 08-15-2018 05:33 PM

60c isn't hot for a VRM temp. You won't see anything bad happen until ~120c and your board will likely throttle at around 90c.

Dopamin3 08-15-2018 05:39 PM

1 Attachment(s)
Quote:

Originally Posted by CJMitsuki (Post 27576752)
60c on your VRMs? That sounds a bit high, I have never seen mine hit 40c even when benching on 1.5v+. You must have some really quiet fans in your case. Has your cpu ever become unstable when running high loads? My system right now is running 4.4ghz on all cores during full load and 1-4 cores on 4.45-4.5ghz during normal tasks and after an hour and 15 min of monitoring the VRM maxed at 30c and 30 min of that was near full load testing memory. I havent ever seen the cpu behavior at higher VRM temps so I am curious as to how it reacts during a stress test.

Not a fair comparison. The C7H has a 10+2 phase configuration with Infneon IR3555, furthermore they are the only board vendor that puts the SOC phases between the CPU phases which results in even better temperatures. (see attached picture) It's also like double the price of the Biostar lol....

And yes @Solarity the Biostar X470GT8 looks like a really good board, ESPECIALLY given it's super competitive pricing. I just wish they would get away from the whole Racing / Vivid LED DJ crap as it's a bit gimmicky. But at it's price point there are no boards that compare. If I was on a budget I would strongly consider this board.

CJMitsuki 08-15-2018 05:44 PM

Quote:

Originally Posted by Dopamin3 (Post 27576768)
Not a fair comparison. The C7H has a 10+2 phase configuration with Infneon IR3555, furthermore they are the only board vendor that puts the SOC phases between the CPU phases which results in even better temperatures. (see attached picture) It's also like double the price of the Biostar lol....

And yes @Solarity the Biostar X470GT8 looks like a really good board, ESPECIALLY given it's super competitive pricing. I just wish they would get away from the whole Racing / Vivid LED DJ crap as it's a bit gimmicky. But at it's price point there are no boards that compare. If I was on a budget I would strongly consider this board.

In all fairness it’s the only example I have to compare to since it’s the only board I have used for such testing. The comparison wasn’t to show which one was better, it was to see how’s your cpu reacts at a higher temp. 60c only seems high, idk if it actually is high for VRMs which is why I was asking if instability was experienced at that temp. It’s more for information purposes since I haven’t actually experienced VRMs running at that temp.

Dopamin3 08-15-2018 05:57 PM

Quote:

Originally Posted by CJMitsuki (Post 27576770)
In all fairness it’s the only example I have to compare to since it’s the only board I have used for such testing. The comparison wasn’t to show which one was better, it was to see how’s your cpu reacts at a higher temp. 60c only seems high, idk if it actually is high for VRMs which is why I was asking if instability was experienced at that temp. It’s more for information purposes since I haven’t actually experienced VRMs running at that temp.

No, 60C is pretty good for VRM load. It's like @The Pook said for VRM temps. You and I just happen to have the board with best VRM on AM4 so we're spoiled lol

CJMitsuki 08-15-2018 06:09 PM

Quote:

Originally Posted by Dopamin3 (Post 27576778)
No, 60C is pretty good for VRM load. It's like @The Pook said for VRM temps. You and I just happen to have the board with best VRM on AM4 so we're spoiled lol

I had saved for awhile bc I had a B350 when Ryzen first launched and the Bios was horrible, I think it was the B350GT5 or something to that effect. I bought a used Prime x370 after that and started saving for something that would last a long time and I love playing with memory timings so I wanted good traces and finally got the 2700x and C7H when it was released and It has been a great board compared to what I did have. The B350 I first started with had the worst bios and nothing to work with so I quickly learned that a good mobo is priority for my purposes. I never did any testing with it or the x370 on my 1700x though. I still have them in my storage so maybe ill put a test bench together and see how the 1700x performs now. I RMA'd my last 1700x since it was an early cpu, (7th week i think?) and the new one is still in the box from AMD taking up space on my desk. Was going to build my daughter a gaming computer with it but I didnt have any ddr4 memory and it was still ridiculous so she got the fx8350 I had a couple years ago with some ddr3 to play minecraft with :D

SuperZan 08-15-2018 07:41 PM

GT7 was great so I'm not surprised that the GT8 is an improvement.

miklkit 08-15-2018 11:05 PM

Quote:

Originally Posted by CJMitsuki (Post 27576752)
60c on your VRMs? That sounds a bit high, I have never seen mine hit 40c even when benching on 1.5v+. You must have some really quiet fans in your case. Has your cpu ever become unstable when running high loads? My system right now is running 4.4ghz on all cores during full load and 1-4 cores on 4.45-4.5ghz during normal tasks and after an hour and 15 min of monitoring the VRM maxed at 30c and 30 min of that was near full load testing memory. I havent ever seen the cpu behavior at higher VRM temps so I am curious as to how it reacts during a stress test.


I guess I didn't make myself clear. When stress testing the case fans are running at 600-700rpm and the vrm heat sink is a block of metal with no fins. So the vrms run a little warm then. The vrms on my Sabertooth destabilize at 81C so the GT7 is comparatively good.



But when gaming the case fans hit 2000rpm all the time. What temps does your gpu run at? The GT7 is not so good for stress testing but is great for gaming.


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