Maximum Supported Hyper-Transport Link Clock??

[Cartel]

I ran HWiNFO64 and it says for my cpu:
Maximum Supported Hyper-Transport Link Clock: 3200 MHz
Current Hyper-Transport Link Clock: 2006 MHz


Is my CPU under clocked on the Hyper-Transport ?
I always read 2000 is the default and increasing it only degrades performance..?

 

[Cartel]

 

[Caring1]

I'm no expert on Hypertransport, but I think your base clock is 2000, and with Turbo Core it will boost faster, but only use three cores instead of the six.
Under load that figure may be higher.

 

[Aquinus]

I'm no expert on Hypertransport, but I think your base clock is 2000, and with Turbo Core it will boost faster, but only use three cores instead of the six.
Under load that figure may be higher.

Sorry, but that's not it. Please don't try to spread information when you're not sure what you're talking about. Hyper transport is not a per-core thing, it's a per-CPU interconnect kind of thing. AM3+ motherboards and CPUs support (stock) 2.6Ghz HTT (5.2GT/s). I don't know why it's reporting HTT 3.1 as a max (which no CPUs use IIRC), but it doesn't technically support it. It should however support up to 2600Mhz, but I see no reason to get HTT to run that high.

A little bit of explination is required for what HTT and CPUNB are.

HTT is the connection between the motherboard north bridge (analogous to Intel's old X58 IOH where PCI-E was on the motherboard.) Overclocking it could cause it can cause the system to become unstable and it's best to be left alone. The only time OCing the HTT would make sense is if PCI-E on your system was getting saturated, which I doubt happens to just about anyone. It also is risky because you can corrupt data going between the motherboard and CPU.

CPUNB is the memory controller clock domain for the IMC and L3 cache itself. By default it is typically the same as the HTT clock domain, but allows for some flexibility.

All in all, if you're trying to increase performance, don't touch HTT and attempt getting the CPUNB clock domain up towards 2400-2600Mhz. This probably will impact memory speeds, so make sure to underclock memory as your push the CPUNB clock domain higher.

 

[Caring1]

Sorry, but that's not it. Please don't try to spread information when you're not sure what you're talking about. Hyper transport is not a per-core thing

I should speculate more often, it seems you're more willing to answer a problem if you can make yourself feel like a big man by correcting others.

 

[Aquinus]

I should speculate more often, it seems you're more willing to answer a problem if you can make yourself feel like a big man by correcting others.

I've owned 3 Phenom IIs and I've overclocked them all. I'm speaking from experience, nothing more, nothing less. I'm correcting you because I noticed that you got it wrong. It's not like I'm going out of my way to find something wrong with what people say.

You really should stop thinking I have an ulterior motive because I want to make sure someone is getting the right information unlike you who seems to be more interested in guessing. I apologize if I come off as rude, but isn't it a bit more rude to mislead people?

 

[OneMoar]

I've owned 3 Phenom IIs and I've overclocked them all. I'm speaking from experience, nothing more, nothing less. I'm correcting you because I noticed that you got it wrong. It's not like I'm going out of my way to find something wrong with what people say.

You really should stop thinking I have an ulterior motive because I want to make sure someone is getting the right information unlike you who seems to be more interested in guessing. I apologize if I come off as rude, but isn't it a bit more rude to mislead people?

hes not worth the breath

 

[pbm86]

2000 Mhz is the maximum HyperTransport frequency for an AM3 CPU. That is the equivalent of 4 GigaTransfers per second.
3200 MHz is the maximum for HyperTransport 3.1 and as far I know only supported by some Opterons.

 

[TheoneandonlyMrK]

My fx chills with a 2600 Ht but will do upto 3000 if the volts are used and tied nb and ht seam to work well so ive mine matched nb and ht at 2600 but cooled more than adequately.

 

[OneMoar]

NB/HT speed really only matters with fast ram >1600mhz

 

[Aquinus]

NB/HT speed really only matters with fast ram >1600mhz

NBCPU speed also impacts L3 cache latency and bandwidth and core to core communication IIRC. I'm less confident on the core 2 core bit, but I know that L3 is tied directly to it.

 

[natr0n]

2200-2400 is ideal based on some tests I read a guy on a forum did with 3dmark or something like that.

you dont notice it much though

 

[Aquinus]

2200-2400 is ideal based on some tests I read a guy on a forum did with 3dmark or something like that.

you dont notice it much though

You see, when I had a Phenom II 940 with DDR2-800, I found that OC'ing it got me a considerable boost in SC2 (and only SC2.) I suspect I was hitting a memory bottleneck and the fast L3 might have been helping with that matter.

You're right though, the conditions have to be right for it to make a difference.

 

[OneMoar]

NBCPU speed also impacts L3 cache latency and bandwidth and core to core communication IIRC. I'm less confident on the core 2 core bit, but I know that L3 is tied directly to it.

if you have it up over 2400 and aren't using ram faster then 1600 effective then there is no need
the simple way is that the ram speed must be divisible by the NB speed to avoid a bottleneck
the phenom II's where really the only chips to see the big-gains

 

[Caring1]

hes not worth the breath

Awww if you weren't so cute ....

You really should stop thinking I have an ulterior motive because I want to make sure someone is getting the right information

As do I, I only found it funny that a thread that has sat for two weeks suddenly gets responses after I attempt to help, even if my answers are incorrect. My apologies to you Aquinus, I really have no problem with your posts and find them quite enlightening.

 

[Pill Monster]

Varies with architecture...... raising the CPU/NB to at least 2400 on Deneb/Thurban is very beneficial (especially Deneb), even more so than increasing memory speed alone. But with BD/PD the L3 cache latency is so high it makes v little difference.

2000 Mhz is the maximum HyperTransport frequency for an AM3 CPU. That is the equivalent of 4 GigaTransfers per second.
3200 MHz is the maximum for HyperTransport 3.1 and as far I know only supported by some Opterons.

Pretty much this.....^ Iirc 3200mhz assumes 32bit full duplex but AMD implemented 16bit links for whatever reason....

 

[MxPhenom 216]

I've owned 3 Phenom IIs and I've overclocked them all. I'm speaking from experience, nothing more, nothing less. I'm correcting you because I noticed that you got it wrong. It's not like I'm going out of my way to find something wrong with what people say.

You really should stop thinking I have an ulterior motive because I want to make sure someone is getting the right information unlike you who seems to be more interested in guessing. I apologize if I come off as rude, but isn't it a bit more rude to mislead people?

He tends to be wrong on a lot of things. I wouldn't be too worried about it.

 

[kn00tcn]

is hwinfo accurate? i've seen it guess things, hardcode things, etc

 

[Tatty_Two]

Back on topic gentlemen please.