Can you adjust FCLK (Infinity Fabric) with the A520 motherboards ?

[noMAD28]

So im about to buy a 5600X but i cant stretch my budget enough to get a b550 board.I can get the best A520 motherboard without stretching my budget at all.I won't OC my cpu and i dont care about pcie 4.0 support.All i really care is tuning infinity fabric (FCLK).I will get 3600 mhz memory and i dont really know about FCLK at all.Would untuned 3600 CL17 give too low performance with a 5600X that i would care about FCLK overclocking ? How much performance would i gain and can i adjust it on a A520 chipset motherboard since it says overclocking is not supported but i dont know if adjusting infinity fabric count as overclock.

[Illusion of Progress]

Overclocking is locked on A520 boards, so I presume changing the Infinity Fabric is out of the question.

That said, the "officially rated" memory support of Zen 3 is the same as Zen 2 at 3200 MHz as the Infinity Fabric defaults to the same 1600 MHz. While the Infinity Fabric is supposed to be able to go higher with Zen 3 (1900 MHz or 2000 MHz as opposed to 1800 MHz with Zen 2), some reports are saying AMD is still tuning this (not sure if this means with BIOS support, as the CPUs are obviously done?) and right now not all are hitting that high. Still, this alone probably isn't going to cost drastic performance.

I'd instead focus on finding tighter timing, 3,200 MHz RAM. With Zen 2, something like 3,600 MHz/CL 16 was often the sweet spot factoring in price. Try and find 3,200 MHz/CL 14 RAM and I'd say you'll be fine.

[noMAD28]

Best i could find at a reasonable price was 3200/CL16 or 3600/CL17.Better ones pretty much dont exist at all or at least double the price.Which one should i get ? Both are very similar in price.

[Monk]

Patriot viper steel series for ram.... Very cheap b die and very fast

[SoldierScar]

noMAD28 の投稿を引用：

Best i could find at a reasonable price was 3200/CL16 or 3600/CL17.Better ones pretty much dont exist at all or at least double the price.Which one should i get ? Both are very similar in price.

Get 3600c17, higher freq is more important on ryzen so you can max out the fclk, also 3600c17 can be usually tightened to 3600cl16, Patriot viper steel or blackout series are very cheap, i got mine 2x8 kit 3600c17 for cheap like 70€, and got it running at 3666c16 easiely, could do even 3800c16 at like 1.45v but it crashes because i hit the fclk limit on my 3700x, which is 1833mhz max. On ryzen 5000 you might hit it just fine because of improved fclk.

[noMAD28]

SoldierScar の投稿を引用：

noMAD28 の投稿を引用：

Best i could find at a reasonable price was 3200/CL16 or 3600/CL17.Better ones pretty much dont exist at all or at least double the price.Which one should i get ? Both are very similar in price.

Get 3600c17, higher freq is more important on ryzen so you can max out the fclk, also 3600c17 can be usually tightened to 3600cl16, Patriot viper steel or blackout series are very cheap, i got mine 2x8 kit 3600c17 for cheap like 70€, and got it running at 3666c16 easiely, could do even 3800c16 at like 1.45v but it crashes because i hit the fclk limit on my 3700x, which is 1833mhz max. On ryzen 5000 you might hit it just fine because of improved fclk.

Thanks,i also found a good deal on a b550 board.At only 20 euros more i'll definitely get the b550.

Monk の投稿を引用：

Patriot viper steel series for ram.... Very cheap b die and very fast

I've found those rams u guys mentioned for 74 euros which is quite cheap.I'll look into them.Thanks everybody.

[Monk]

They do 4400MHz for like £110 for 2x8GB

[xSOSxHawkens]

Illusion of Progress の投稿を引用：

Overclocking is locked on A520 boards, so I presume changing the Infinity Fabric is out of the question.

That said, the "officially rated" memory support of Zen 3 is the same as Zen 2 at 3200 MHz as the Infinity Fabric defaults to the same 1600 MHz. While the Infinity Fabric is supposed to be able to go higher with Zen 3 (1900 MHz or 2000 MHz as opposed to 1800 MHz with Zen 2), some reports are saying AMD is still tuning this (not sure if this means with BIOS support, as the CPUs are obviously done?) and right now not all are hitting that high. Still, this alone probably isn't going to cost drastic performance.

I'd instead focus on finding tighter timing, 3,200 MHz RAM. With Zen 2, something like 3,600 MHz/CL 16 was often the sweet spot factoring in price. Try and find 3,200 MHz/CL 14 RAM and I'd say you'll be fine.

You are a bit off on your speeds.

Ryzen 3000 (non XT) runs with a default stock max of 3600Mhz (mem) and 1800Mhz IF, with the XT models (3900xt eg) offering out of the box stock @ 1900Mhz IF and 3800Mhz memory.

3200Mhz (soft) limit was Ryzen 2000 line...

All of them can "officially" support higher as well, though with DRAM:IF at a 2:1 instead of 1:1 at that point, which lowers performance untill you hit the 4000mhz or higher kits and are able to claw back some of what you lost, but thats not really worth it, though still officially supported.

[Illusion of Progress]

xSOSxHawkens の投稿を引用：

You are a bit off on your speeds.

Ryzen 3000 (non XT) runs with a default stock max of 3600Mhz (mem) and 1800Mhz IF, with the XT models (3900xt eg) offering out of the box stock @ 1900Mhz IF and 3800Mhz memory.

3200Mhz (soft) limit was Ryzen 2000 line...

All of them can "officially" support higher as well, though with DRAM:IF at a 2:1 instead of 1:1 at that point, which lowers performance untill you hit the 4000mhz or higher kits and are able to claw back some of what you lost, but thats not really worth it, though still officially supported.

Oh, thanks for the corrections. I thought Zen 2 was all 1600 MHz Infinity Fabric. If that's not the case then I've no idea where I picked that up (must be from Zen + if that was its Infinity Fabric speed). I knew all Zen 2 samples would do at least 1,800 MHz anyway but I thought they were lower at "default".

In that case, 3,600 MHz RAM at the best timings you can get. Even if you can't adjust anything overclocking-wise on A520, that will match it 1:1.

[noMAD28]

Illusion of Progress の投稿を引用：

Oh, thanks for the corrections. I thought Zen 2 was all 1600 MHz Infinity Fabric. If that's not the case then I've no idea where I picked that up (must be from Zen + if that was its Infinity Fabric speed). I knew all Zen 2 samples would do at least 1,800 MHz anyway but I thought they were lower at "default".

In that case, 3,600 MHz RAM at the best timings you can get. Even if you can't adjust anything overclocking-wise on A520, that will match it 1:1.

I will get 3600 mhz but i'll get a b550 since found it for cheap.Thanks.

Monk の投稿を引用：

They do 4400MHz for like £110 for 2x8GB

They are more like 400 pounds in my country sadly.

[Monk]

For the vipers? Damn, that's crazy, sorry to hear that.

[noMAD28]

Monk の投稿を引用：

For the vipers? Damn, that's crazy, sorry to hear that.

Yeah,not much demand for such high clocked kits in my country.Thats why they are too expensive.