1 core 2 logical processors

[dev893]

So I have a AMD A6-5400K which is a dual core processor. windows is only detecting it as 1core 2logical processors and some games as well are only registering 1 core but when I run a third party program to monitor usage it registers the usage on both cores. I'm guessing this is the reason some games refuse to work. does any one know a fix? I have already gone into msconfig>boot>advanced options and made sure everything was unchecked

[xXxYOLOxSWAGxXx_420BlazeIt]

It is only a single core processor with Hyperthreading (or whatever AMD calls it).

[dev893]

It is only a single core processor with Hyperthreading (or whatever AMD calls it).

the thing is though AMD doesn't have Hyper threading or anything like that 

 

Edit: atleast not to my knowledge

[Pidagad]

I have the same APU in my NAS on an ASRock ITX board (the FM2A85X-ITX) -> it should be detected (everywhere) as a dualcore...

 

Which mainboard do you have?

 

Have you changed anything (cpu related) in the UEFI?

 

You could set Processor Cores to "2" in msconfig

[dev893]

I have the same APU in my NAS on an ASRock ITX board (the FM2A85X-ITX) -> it should be detected (everywhere) as a dualcore...

 

Which mainboard do you have?

 

Have you changed anything (cpu related) in the UEFI?

 

You could set Processor Cores to "2" in msconfig

only CPU changes I made is overclocking CPUZ detects two cores it's onlyMSinfo32 that detects it as 1 core but I get warnings from certain games saying that they require dual core processor and that I only have a single core. I just got off the phone with ASrock they said that it is an issue with windows. I have the ASrock FM2A55M-VG3+

[Kyuubixchidori]

my brother has a fx 6300, cinebench sees it as 3 cores 6 threads. Im sure its fine

[Mojo-Jojo]

So I have a AMD A6-5400K which is a dual core processor. windows is only detecting it as 1core 2logical processors and some games as well are only registering 1 core but when I run a third party program to monitor usage it registers the usage on both cores. I'm guessing this is the reason some games refuse to work. does any one know a fix? I have already gone into msconfig>boot>advanced options and made sure everything was unchecked

This is the reason there's so much hate on AMD. They misadvertise their CPUs. They are not actual x-cores, but half that, and then the other half is some SMT-implementation similar to what intel calls hyperthreading.

 

Windows 7 is known to handle it poorly. The process scheduler in windows 8 and up should handle it well.

[Admiaczking]

It is only a single core processor with Hyperthreading (or whatever AMD calls it).

so all AMD processors have half as many cores as they say they have?

[Mojo-Jojo]

so all AMD processors have half as many cores as they say they have?

Yes.

 

Well, not all. But their newer ones.

[Admiaczking]

Yes.

 

Well, not all. But their newer ones.

what a shitload of f*ck

[Mojo-Jojo]

what a shitload of f*ck

It's actually quite a bit more complicated, but it comes down to the fact that instead of cores, AMD processors have 'modules'. Each module comes down to 2 logical processors. Every module has all the components necessary to make a full core, but not quite two full cores. The two 'cores' in a module have to share certain cache and computation resources such as floating point units between two simultaneous threads.

 

A badly optimized OS would send two unrelated calculations to two cores within a module, meaning they have to contend for resources causing sub-par performance.

 

In that sense, the approach is better than hyperthreading because hyperthreading shares one computation unit between two virtual threads, meaning that the AMD approach offers more resources per thread than hyperthreading; it does offer two real threads with each their own resources. But they're shared. Halved, if you will. However, it is still not a full core and only very recent OSs actually schedule processes correctly to avoid the issue I described above.

[Admiaczking]

It's actually quite a bit more complicated, but it comes down to the fact that instead of cores, AMD processors have 'modules'. Each module comes down to 2 logical processors. Every module has all the components necessary to make a full core, but not quite two full cores. The two 'cores' in a module have to share certain cache and computation resources such as floating point units between two simultaneous threads.

 

A badly optimized OS would send two unrelated calculations to two cores within a module, meaning they have to contend for resources causing sub-par performance.

 

In that sense, the approach is better than hyperthreading because hyperthreading shares one computation unit between two virtual threads, meaning that the AMD approach dose have more performance, in theory, than hyperthreading. However, it is still not a full core.

thanks for the info

[dev893]

Yes.

 

Well, not all. But their newer ones.

I just got off the phone with AMD and the CPU is 2 cores there is no "hyper threading". If I check CPUZ it detects 2 cores 2 threads it's only MSinfo32 that is having an issue and I'm guessing that is the program that games use to detect the hardware

[Mojo-Jojo]

I just got off the phone with AMD and the CPU is 2 cores there is no "hyper threading". If I check CPUZ it detects 2 cores 2 threads it's only MSinfo32 that is having an issue and I'm guessing that is the program that games use to detect the hardware

My post above goes a bit more in depth than the statement you quoted.

Windows 7 doesn't know how to deal with thu architecture (unless an update has been issued to the kernel that resolves it) but windows 8 and 8.1 make much better use of it. They avoid the issue I described there by treating each module as 1 core with 2 logical threads.