AMD FX-9590 not showing/using all 8 cores HELP.

[Nate1990]

Hi, so iv'e had this CPU for a while now and iv'e no major problems with it, but now and then i feel a slowness or something. so i checked to see if it was using all cores, but when i look at task manager or CPUZ, it shows something different on both, but not the 8 cores its supposed to show. task manager shows 2 cores 4 logical processors and CPUZ shows 4 cores 4 threads. Now i'm just a novice at tech specs but i'm sure that means its not using all 8 cores.. the Fx-9590 has a 5ghz turbo built in, but ive been playing games and at times the CPU usage hits 100% but it stays at about 4.70ghz.. Can someone please give me a hand with setting this right.

 

Many Thanks Nate.

[Nena Trinity]

1. Check BIOS

2. If all is good, most likely task manager is being stupid...

[Shimejii]

Amd got in trouble for false advertising for this kind of thing with bulldozer. It would be similar to Intel saying the 5960x is a 16 core processor, while its really only an 8 core with 8 threads. Its a 4 core 4 thread CPU, which is a theoretical 8 core, but realistically its 4 cores and 4 threads

[Nate1990]

So what does that mean.. i'snt it supposed to say 8 cores not 2 or 4? in the bios it just says Processor: AMD FX-9590 8 CORE PROCESSOR. unless theres something i need to tweek or switch on to enable the 8 cores.. plus the 5ghz turbo isnt kicking in, i was told it would kick in when its under load, but its been to 100% and stayed at 4.7ghz, i'm a bit lost to be honest. hence coming here for the pro info. :-)

[Dabombinable]

5 minutes ago, valdyrgramr said:

Windows reads the 4 modules over the 8 cores inside of the modules.  I know because it did it with my 9370.

4 cores 2 logical proccesors means that only half of the FX 9590 is actually working-it wouldn't be as bad if it was only a single ALU failing (in fact one module would have a higher IPC than the others because it wouldn't be sharing cache)..

[PlayStation 2]

4 minutes ago, Shimejii said:

Amd got in trouble for false advertising for this kind of thing with bulldozer. It would be similar to Intel saying the 5960x is a 16 core processor, while its really only an 8 core with 8 threads. Its a 4 core 4 thread CPU, which is a theoretical 8 core, but realistically its 4 cores and 4 threads

Not false advertising. The CPU physically has 8 cores. Every two cores, however, share a floating point unit (or was it an integer unit?) and cache.

[Dabombinable]

1 minute ago, valdyrgramr said:

Okay, think of it this way.  There are 8 cores.  However, there are 2 cores per module.  What windows is reading is the modules over the actual cores.

 

Um, it's a 4 modules, 8 core CPU.  There are "cores" inside the modules.  What intel does is different.  Intel uses 4 "cores" and then uses hyperthreading to create fictional cores.

Look, check  the SS of CPUz, it would say 8 threads if it was working properly. Also, AMD added an extra ALU to their CPU cores to create fictional cores....

[Nate1990]

OK, so like i said im a novice.. haha. i understand what cores and modules are though. so if its not using half of what it has, how do i turn it on and make it use it all?

[zMeul]

@Nate1990 Windows is quite right

that CPU has 4 modules with 2 clusters each

 

AMD got in trouble for this:

---

 

right click on the CPU % graph and switch to show by logical cores

[Nate1990]

ok so this is what Hardware Monitor shows me..

[Nate1990]

so can this be sorted or not? if its ment to have 8 cores then can we enable them all, and if not, then how can i get it to boost to 5ghz, because its defo not doing it even under load..

[Dabombinable]

2 minutes ago, Nate1990 said:

so can this be sorted or not? if its ment to have 8 cores then can we enable them all, and if not, then how can i get it to boost to 5ghz, because its defo not doing it even under load..

I'm not sure, CPUID should be showing 8 threads, so its quite possible that you've had 1 ALU die in each module (or that they are disabled in the bios).

[Nate1990]

the CPU is less than 6 months old so i dont think anything has died.. ill look in the bios and see what it says, again, im not exactly sure on what i should be looking for or what bits will help, but ill look anyway and see af anything abvious pops out at me. ill reply tomorrow, its late here in the UK and i have work. meh. thanks for your help so far guys. i really appreciate it, i hope we can get it running on all cores.

[Godlygamer23]

43 minutes ago, valdyrgramr said:

Windows reads the 4 modules over the 8 cores inside of the modules.  I know because it did it with my 9370.

Yes that's true, but two cores/4 threads? That means it's only seeing four cores.

 

@zMeul

A quote from your own post, which you're using to blame AMD with this issue:

Quote

kida' true and kinda' not; Windows will show 4 cores and 8 logical processors

The 9590 is no different than the 8350 except for clock speeds and the binning.

Another quote:

Quote

what's happening is that AMD designed this architecture by having individual modules, each including two clusters

- it's way different than Intel's Hyper Threading

this will be a tricky one for AMD, because technically the CPU only has 4 cores; and it's especially tricky because each module has only one FPU

This is definitely not the cause of the OP's problem.

[zMeul]

Just now, Godlygamer23 said:

This is definitely not the cause of the OP's problem.

that's why I suggested he switches to logical cores view, it's quite possible he has parked or disabled cores

[Godlygamer23]

Just now, zMeul said:

that's why I suggested he switches to logical cores view, it's quite possible he has parked or disabled cores

Task Manager is only showing four logical cores. CPU-Z is only showing four logical cores as well.

[zMeul]

1 minute ago, Godlygamer23 said:

Task Manager is only showing four logical cores. CPU-Z is only showing four logical cores as well.

I don't have such a CPU, doesn't the task manager show parked cores? or Resource Manager?

 

 

[MblaZe7run]

Correct me if I'm wrong, but Task Manager should show 4 cores, 8 threads versus the 2 cores, 4 threads that it is? Just trying to understand this as it seems a lot of people are really missing the nail here, but keep driving at it.

[Godlygamer23]

Just now, zMeul said:

I don't have such a CPU, doesn't the task manager show parked cores?

It should show the detected number of cores, parked or not. That number should not change based on what cores are in use, since the OS and the rest of the system is using them.

 

If OP is DISABLING modules in the BIOS, that's completely different and that will show up in Windows and other programs since those other cores are completely turned off. And let's be real here: The OP could be playing us all right now.

[Godlygamer23]

2 minutes ago, valdyrgramr said:

Ya, I just noticed that.

 

There's another thing that can cause it too, and that's in windows itself. It's in that that's in system configuration/msconfig.exe, under the boot tab, advanced options, and then checking the check box and upping the core count there too can help.  I forgot about that.

The OP could try running a stress test to see if that changes anything in CPU-Z or Task Manager.

[Demonking]

1 hour ago, Godlygamer23 said:

It should show the detected number of cores, parked or not. That number should not change based on what cores are in use, since the OS and the rest of the system is using them.

 

If OP is DISABLING modules in the BIOS, that's completely different and that will show up in Windows and other programs since those other cores are completely turned off. And let's be real here: The OP could be playing us all right now.

i'm willing to bet he's fucking with us.

[Guest]

Go into BIOS and see if you have cores disabled. 

[bob211418]

So I haven't encountered this issue, but I can't get it to turbo at all and I had to disable C1 and C6 states in the BIOS in order the have even the slightest bit of stability. Any suggestions to fix this?

[Dabombinable]

6 minutes ago, bob211418 said:

So I haven't encountered this issue, but I can't get it to turbo at all and I had to disable C1 and C6 states in the BIOS in order the have even the slightest bit of stability. Any suggestions to fix this?

You'll have to downclock your FX9590 or increase the voltage. All it is is a heavily overclocked FX 8350, and they are well know for having a high chance of not running stable at 5GHz.

[bob211418]

Thanks. I'll just keep it at stock so it can handle Fallout 4 on ultra.