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post #291 of 304 (permalink) Old 05-14-2019, 01:45 PM
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Quote: Originally Posted by 8051 View Post
Is the CPU-NB speed at all analogous to Intel's uncore?

It would be interesting to see if these 5+ Ghz. piledriver CPU's are being limited by memory bandwidth and how fast the IMC can be pushed.

This was a really interesting thread.
Well if Uncore is what intels memory controller is called than yes.



I wouldn't say limited as such. But definitely provides extra performance. One of FX's problems was its slow cache. And the L3 cache is tied into the memory controller. So upping the memory controller upped the L3 cache speed as well. Which frees up a little IPC performance as there isnt as big of a hit when moving from L2 to L3. And obviously higher NB also reduces the penalty when going from L3 to DRAM slightly as well. When at 5GHz a good NB clock might give you a handful of %. Maybe around 5% at most. and then coupled with good memory you might get a total of like 10% over just a pure core OC 5GHz FX that is running stock NB and like slower 1600 or 1866 ram.



I dont know how the OP is doing it but 2800+ cpu-nb is near impossible in any normal configuration. So his chip is literally solid gold for his core clock + cpu-nb combo. Just it golden as most FX's come chugging to a grinding halt at around 2700 cpu-nb. I am very happy at 2700 CPU-NB @ 1.3875V. But pushing that even to as little as ~2730 causes the whole system to fall on its face. Even force feeding it 1.5V+ does nothing to stabilize my CPU-NB above 2700. I think heat is my enemy here. But thats what I get for living in africa. Even our winters are warm. 25C indoors no A/C.

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post #292 of 304 (permalink) Old 05-14-2019, 02:09 PM
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Quote: Originally Posted by SoloCamo View Post
Sorry, meant for the API test. BF 64 player map games are near enough impossible for accurate results as not only does it depend on playstyle, each game can be completely different regardless of the map. Really wish there was a built in benchmark for it. Even my 4790k is often at 70%+ usage and that's with my oc'ed V64 at 3200x1800 all ultra settings.
I should have realized that's what you meant - sorry. https://www.3dmark.com/aot/307071
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post #293 of 304 (permalink) Old 05-14-2019, 05:15 PM - Thread Starter
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Quote: Originally Posted by bobbygamer View Post
Interesting thread good read I'm kinda in the same boat as you kinguniverse a amd fan I have 2 FX based rigs and want to upgrade to zen2. First rig a first gen FX8120 decided it was kinda a dog overclocked well but jumped over FX83XX and built a custom water cooled dual cpu opteron g34 rig and nave been able to snag es cpus from each gen (Gen1 Magny-Cours 12cores Gen2 Interlagos 16cores Gen3 Abu Dhabi 16cores).

Recently got a 2080ti and stuck it in the 8120 rig to test it out (and I didn't get waterblock yet) and it seems pretty bottlenecked to me and then I was thinking you know the 980ti in the 32 core rig seems bottlenecked too I should do some benchmarks to see just how bad it is maybe this weekend the 32 core rig is pretty hardcore for what it is basically 4 83xx chips and since they are es they have open multiplier and the rig has a 420mm rad with push pull 2000rpm fans so heat isn't a issue noise and room comfort is recently put a OCNG5 compatible board in but need to put cooling on the chokes first killed my old board not having big enough heatsinks I'll be getting a heatkiller for the 2080ti and we'll see what it does in it was able to run the old Interlagos chips at 4.5ghz all core turbo 24/7 with the window open in the winter lol

Interlagos chips:
http://valid.x86.fr/xxh1jt

The single 2080 Ti definitely works for what I needed it for (60 fps 4K Ultra) except in a few titles, but DEFINITELY bottlenecked with 2. I'll just wait until July and get the higher clocked between the two 12 and 16 core Zen 2 chips. I'll update
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post #294 of 304 (permalink) Old 05-14-2019, 05:23 PM - Thread Starter
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Quote: Originally Posted by Alastair View Post
Quote: Originally Posted by 8051 View Post
Is the CPU-NB speed at all analogous to Intel's uncore?

It would be interesting to see if these 5+ Ghz. piledriver CPU's are being limited by memory bandwidth and how fast the IMC can be pushed.

This was a really interesting thread.
Well if Uncore is what intels memory controller is called than yes.



I wouldn't say limited as such. But definitely provides extra performance. One of FX's problems was its slow cache. And the L3 cache is tied into the memory controller. So upping the memory controller upped the L3 cache speed as well. Which frees up a little IPC performance as there isnt as big of a hit when moving from L2 to L3. And obviously higher NB also reduces the penalty when going from L3 to DRAM slightly as well. When at 5GHz a good NB clock might give you a handful of %. Maybe around 5% at most. and then coupled with good memory you might get a total of like 10% over just a pure core OC 5GHz FX that is running stock NB and like slower 1600 or 1866 ram.



I dont know how the OP is doing it but 2800+ cpu-nb is near impossible in any normal configuration. So his chip is literally solid gold for his core clock + cpu-nb combo. Just it golden as most FX's come chugging to a grinding halt at around 2700 cpu-nb. I am very happy at 2700 CPU-NB @ 1.3875V. But pushing that even to as little as ~2730 causes the whole system to fall on its face. Even force feeding it 1.5V+ does nothing to stabilize my CPU-NB above 2700. I think heat is my enemy here. But thats what I get for living in africa. Even our winters are warm. 25C indoors no A/C.


How are you checking your CPU-NB voltage? My NB Core is an offset (+0.200V) and my NB Voltage is at 1.2V

I know the two are different (one being inside the CPU) but how would I check my CPU-NB (NB Core) voltage, which is what you're talking about, correct? I haven't pushed voltages much higher than this because of what I've read is "safe", but with this system on it's way out, I may just push things as far as I can in the meantime.
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post #295 of 304 (permalink) Old 05-14-2019, 07:25 PM
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Quote: Originally Posted by KingUniverse View Post
How are you checking your CPU-NB voltage? My NB Core is an offset (+0.200V) and my NB Voltage is at 1.2V

I know the two are different (one being inside the CPU) but how would I check my CPU-NB (NB Core) voltage, which is what you're talking about, correct? I haven't pushed voltages much higher than this because of what I've read is "safe", but with this system on it's way out, I may just push things as far as I can in the meantime.
CPU/NB voltage is for the integrated memory controller (IMC) and is useful for the aid in Memory overclocking and stability.

NB @ 1.2v is the NB v-core.

You can safely run CPU/NB (IMC) at 1.45v (will increase cpu temps)
NB v-core (Chipset) to 1.30-1.35v - should be actively cooled.
HT - 1.3v is fine 3Ghz
Cpu v-core - Varies due to temp mostly.
Memory - also depends on demands.


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post #296 of 304 (permalink) Old 05-14-2019, 11:33 PM
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Quote: Originally Posted by KingUniverse View Post
How are you checking your CPU-NB voltage? My NB Core is an offset (+0.200V) and my NB Voltage is at 1.2V

I know the two are different (one being inside the CPU) but how would I check my CPU-NB (NB Core) voltage, which is what you're talking about, correct? I haven't pushed voltages much higher than this because of what I've read is "safe", but with this system on it's way out, I may just push things as far as I can in the meantime.
I dont know what motherboard you use. But CPU-NB voltage is labeled as CPU-NB in my BIOS. How the doodle are you keeping 2800 stable if you dont know which one is which



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post #297 of 304 (permalink) Old 05-15-2019, 11:55 AM - Thread Starter
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Quote: Originally Posted by Alastair View Post
Quote: Originally Posted by KingUniverse View Post
How are you checking your CPU-NB voltage? My NB Core is an offset (+0.200V) and my NB Voltage is at 1.2V

I know the two are different (one being inside the CPU) but how would I check my CPU-NB (NB Core) voltage, which is what you're talking about, correct? I haven't pushed voltages much higher than this because of what I've read is "safe", but with this system on it's way out, I may just push things as far as I can in the meantime.
I dont know what motherboard you use. But CPU-NB voltage is labeled as CPU-NB in my BIOS. How the doodle are you keeping 2800 stable if you dont know which one is which [IMG class=inlineimg]/forum/images/smilies/sad-smiley-002.gif[/IMG]



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post #298 of 304 (permalink) Old 05-15-2019, 01:21 PM
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Quote: Originally Posted by KingUniverse View Post
It's a GA-990FX-UD7

I have a platinum binned chip 😎
Nice board, I had one. The naming is a little different in the bios from Asus terminologies though.


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post #299 of 304 (permalink) Old 05-15-2019, 01:46 PM
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Quote: Originally Posted by cssorkinman View Post
I should have realized that's what you meant - sorry. https://www.3dmark.com/aot/307071
Thanks, I'll have to give it a go on both my systems. Really wish I had a card faster than V64 though for the sake of consistency. Ah well.

Maybe I'll even test it on my Xeon 8 core (well two quad e5450's paired). Would be fun to see how bottlenecked the 7970Ghz is in that. 32gb of ddr2 667. Thing ran BFV even at the lowest res/settings only in the 15-25fps range on 64 player maps.


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post #300 of 304 (permalink) Old 05-15-2019, 06:16 PM
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http://www.3dmark.com/aot/307248

Hmmm, odd results to be honest.


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