Did Biostar's X470GT8 just make one of the best X470 boards VRM wise? - Page 2 - Overclock.net - An Overclocking Community

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Did Biostar's X470GT8 just make one of the best X470 boards VRM wise?

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post #11 of 59 (permalink) Old 08-16-2018, 05:33 AM - Thread Starter
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I am glad I am not the only one who thought so. I have been inputting data from various Ryzen compatible boards into a spreadsheet to better understand them. I have learned a lot about VRMs and that the phase count doesn't show the whole story. I am assuming if they ditched the doublers this would have an 8 phase for the CPU.

I also see the C7H has a very similar VRM, also from what I read the the PWM ASP1405I is really a rebadged IR35201. Assuming that is true, the Biostar has more money in their VRM (excluding caps/chokes) than the C7H, this is what I got from Digikey.

X470GT8
IR3555 $2.17 x12= $26.04
IR35201 $3.78 x1= $3.78
IR3599 $0.43 x6= $2.58
Total $32.40

Crosshair 7
IR3555 $2.17 x12= $26.04
IR35201 $3.78 x1= $3.78
IR3599 $0.43 x5= $2.15
Total $31.97

The C7H has one more interleaved CPU phase then the GT8, though the SOC has 2 interleaved phases on the GT8, while the C7H has no interleaving on the SOC. Again I am no expert in VRMs, though I am curious how this would impact performance. Does having 5 vs 4 interleaved CPU phases make that much of an impact? I am assuming the GT8 would be better for APUs.
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post #12 of 59 (permalink) Old 08-16-2018, 06:29 AM
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There's diminishing returns for ripple after 6 PWM phases let alone 10. The reason why there's so many phases is due to heat.


The Biostar board is likely accommodating for APUs whereas the CH 7 Hero is clearly not meant for APUs.


If you want a better picture of pricing you should use octopart.

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post #13 of 59 (permalink) Old 08-16-2018, 08:38 AM
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Quote: Originally Posted by Solarity View Post
X470GT8
IR3555 $2.17 x12= $26.04
IR35201 $3.78 x1= $3.78
IR3599 $0.43 x6= $2.58
Total $32.40

Crosshair 7
IR3555 $2.17 x12= $26.04
IR35201 $3.78 x1= $3.78
IR3599 $0.43 x5= $2.15
Total $31.97
Mouser gets them down to 2.07 if you buy the whole reel. Reels usually come in 3000 to 5000 pieces.

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post #14 of 59 (permalink) Old 08-16-2018, 10:18 AM
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sure you are looking at the right sensor?


Quote: Originally Posted by CJMitsuki View Post
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.
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post #15 of 59 (permalink) Old 08-16-2018, 10:23 AM
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Quote: Originally Posted by poah View Post
sure you are looking at the right sensor?
Fairly certain unless HWiNFO has it labeled wrong. It’s the only one that says VRM. I do plan on buying an infrared temp gun and soldering digital readouts to the probe-it points and mounting them to the case but just haven’t gotten around to it yet. So I guess there is a chance the sensor is labeled wrong albeit a small one.

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post #16 of 59 (permalink) Old 08-16-2018, 11:36 AM - Thread Starter
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Quote: Originally Posted by AlphaC View Post
There's diminishing returns for ripple after 6 PWM phases let alone 10. The reason why there's so many phases is due to heat.


The Biostar board is likely accommodating for APUs whereas the CH 7 Hero is clearly not meant for APUs.


If you want a better picture of pricing you should use octopart.
So basically will perform similar for CPU OC'ing, assuming there is adequate cooling for both. Though the BioStar might have a slight edge on things that are SOC dependent like APUs? Does one really stand out better in your opinion?

This board does seem to also come with a lot of other nice options:
-Dual Bios
-Bios Switch
-2 Digit Debug LED Display
-Power, Reset, & clear CMOS buttons
-3.1 Gen2 Type-C port
-2xUSB 3.1 Gen 1 headers
-2xUSB 2.0 Headers
-5xPWM Fan headers
-LN2 Switch (marketing?)

Cons:
-No 3.1 Gen2 header
-Only 1 M.2 Slot
-Not the same name recognition as the bigger names.
-Same form over function VRM setup?

It isn't the prettiest board, though at least it doesn't have red or other non-neutral colors on it. I also can't speak for the VRM heat sink, there is no heat pipe connecting the two heat sinks. In this review, the reviewer seemed pleased with the UEFI: http://www.madshrimps.be/articles/ar...oard-Review/20

When it comes to customer support, this can't be any worst than what is provided by other brands in Taiwan. This board seems like a great value. It is a $200+ board for $160, granted it is not an entry level price like some of the sub-$100 boards. Though if someone is on a budget and is serious about OC'ing, it seems like a better use of money, then putting into a board that says ROG or comes with stickers.

Quote: Originally Posted by czin125 View Post
Mouser gets them down to 2.07 if you buy the whole reel. Reels usually come in 3000 to 5000 pieces.
I was just using it for comparison as they all use the same parts, assuming the PWM controllers are the same. The price was based on reel pricing. I fully assume that these guys can get it these parts even cheaper.
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post #17 of 59 (permalink) Old 08-17-2018, 08:28 AM - Thread Starter
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Wow, just dropped down $10 to $150...hrmm...
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post #18 of 59 (permalink) Old 08-17-2018, 09:06 AM
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Tempting indeed. It's the first board I've owned that has dual bios with a switch and all future boards WILL have this feature. I never knew how bad I had it before.



If you look at a picture of one on the bottom you will see a big blue socket. That is where the case front panel plugs in and it is in a bad spot because that big cable has to make a 90 degree bend out into the case and then make a 180 degree bend to plug in. At least it's on the bottom where it isn't too noticeable unlike ASUS which puts it right under the dimm slots so it is sticking out right in the middle of the case. It would be better if it was mounted next to the sata ports facing forward like MSI does.



The vivid led stuff only restricts air flow and is easily unbolted. Why has no one mentioned that it has both P-state and bclk overclocking?

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post #19 of 59 (permalink) Old 09-25-2018, 09:12 PM
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Literally just looking at this board too, VRM def one of the reason that caught my eye and for the price, I think it's a steal! For $154.99. Did anyone buy it yet?
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post #20 of 59 (permalink) Old 09-25-2018, 10:29 PM
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Apologies for the poor quality of the pic, but this is my GT7 and then there it is doing ycruncher last May. It is over a year old and typically sees 12 hour days, mostly gaming.
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Last edited by miklkit; 09-25-2018 at 10:32 PM.
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