Hyper Transport Frequency/HT Link Speed?

keogh · 31 Mar 2007 at 10:08

Howdy,

In the process of an overclock, and I have now got my HT Link at 1100mhz, and I don't particular want to increate the FSB again until I know what the max/ideal mhz speed is for the HT Link? I was told they don;t like going above 1000mhz, but my mobo puts it at 1010mhz on stock, and also I'm sure someone on here said they has theirs at 2000mhz :eek:

but I might have got that wrong?

I have a Asus A8N-SLi Premium with a X2 4400+ (939). Can anybody tell me what I should try to get my Hyper Transport Frequency speed to? OR what I should not exceed?

Any help is appreciated

p.s. SO far I have got my 4400+ to 2.4ghz if that makes any difference to the speed of the HT Link?

Thanks

Steve M

keogh · 31 Mar 2007 at 10:27

Just seen:

Jokester said:
Hypertransport Frequency/Multiplier - A64s
This is specific for A64s and X2 processors, the hypertransport is 1000MHz, derived from 5xFSB. Many boards can't handle significant overclocks of this bus, so it's best to reduce the multiplier to 4 or 3 depending on how high the FSB is. The performance difference between 800 and 1000MHz is insignificant so don't be concerned if you're particular combination results in a relatively low value. Hypertransport settings may also be referred to as LDT frequency et

On the beginners guide... that is actually perfectly goood enough for me to understand what to do... try to keep it below 1000, yet above 800!

ta

ih8modem · 31 Mar 2007 at 14:14

FSB

To get your 4400 to 2.4, I guess you just changed the FSB from 200 to 218 (2398) / 219 (2409) / 220 (2420) ? If you have not changed the Hyperlink multiplier, it would have just multiplied the 218 x 5 = 1090 etc. If you left the BIOS on auto, thats generally what it would do. IIRC in the BIOS you can manually set the HT multiplier in .5 increments ? Drop it down to 4.5 and you should get close back to the original 1000Mhz.

Off to see what mine is doing right now...

keogh · 31 Mar 2007 at 14:16

Oh I know how to change it etc, just didnt know what speed it should be running it at.

I have it at x4 now, and its at 920mhz... so quite a nice speed at the moment.

ih8modem · 31 Mar 2007 at 14:22

x4 yeah

Yeah it's only 1,2,3,4,5x , not in .5 as I thought. Mine is currently on 4x as well, and I am clocking 2420 (FSB 220x11). HT is 880. Very stable and temps are low. These can do a lot more I think.

Jokester · 31 Mar 2007 at 14:23

Some boards can handle upto 1200MHz on the HT, but there's no real benefit in doing so.

Jokester

keogh · 31 Mar 2007 at 14:27

Yeah mine is on 941mhz at the mo, with 235x11 putting my 4400 at 2588mhz so far... gonna up another 5mhz now, cos I just run orthos for 45min without a prob. Getting near my max though... cos temps are at 58 max on load now.

ih8modem theres more in the 4400 than 2.4ghz... get ocing!

ih8modem · 31 Mar 2007 at 17:47

not in mine

I can't get mine stable over 220 FSB, crashes at even 225. I suspect my memory is the issue. I have loosened the timings to 4-4-4-8 from the supported 3-3-3-8 but I still get random reboots.

It's not that good a set of RAM to be honest, it's budget stuff.

kitfit1 · 31 Mar 2007 at 22:20

Jokester said:
Some boards can handle upto 1200MHz on the HT, but there's no real benefit in doing so.

Jokester

Certainly DFI Ultra-d's can, have a look here. But i have to dissagree with "but there's no real benefit in doing so". No benefit as far as benching goes, but in real world computing that's far from the truth. If you want to see Apps open like grease lightning then try at 1200HT. Everything is faster in use, games load faster, apps do, everything. So i'm saying, if you can clock the HT higher, do it you will be amazed.

Ronaldo · 1 Apr 2007 at 01:34

i personally think there is a small benefit.

my HTLink is 1094 but when i had it on (x3) 819 on my OCZ Platinum @cl2.5 it had a higher latency then *** i had @cl2 (lower fsb) but when i switched to 1094 (x4) the latency was the same as i had on cl2 and response of apps seems smoother, i think that was because i had ram OC'd with 2.5-3-2-5 timing

Jokester · 1 Apr 2007 at 09:24

kitfit1 said:
But i have to dissagree with "but there's no real benefit in doing so".

There was numerous tests done when A64s first came out between the boards limited to 800MHz and those that were full speed at 1000MHz, the difference across all applications was less than 2%, oncer you get over the 800MHz mark increasing HT frequency makes next to no difference.

Jokester

kitfit1 · 1 Apr 2007 at 19:31

Jokester said:
There was numerous tests done when A64s first came out between the boards limited to 800MHz and those that were full speed at 1000MHz, the difference across all applications was less than 2%, oncer you get over the 800MHz mark increasing HT frequency makes next to no difference.

Jokester

Yes, and i fully agree with the tests(done them myself)and you. What i was saying though relates to the speed of opening apps and the general feel of speed in the whole o/s. These things don't show up in benchies, but DO show up in front of your eyes when using your rig. It's a hard thing to describe, you really have to be using a rig running at 1200+ to fully get the gist of what i'm saying. Of course, nothing matters more than the highest cpu speed possible. But if it can be done at 1200 or so HTT, then your really flying.

doctoe2260 · 3 Apr 2007 at 21:14

keogh said:
Yeah mine is on 941mhz at the mo, with 235x11 putting my 4400 at 2588mhz so far... gonna up another 5mhz now, cos I just run orthos for 45min without a prob. Getting near my max though... cos temps are at 58 max on load now.

ih8modem theres more in the 4400 than 2.4ghz... get ocing!

I'm running a 4200 at 2.6ghz with load temps barely hitting 50. Would push it higher but voltage is already high (1.5v) and pushing it to 1.55 doesn't make things any better.
So 2.6 should be a reasonable target for a 4400!