So what really is faster...3.8GHZ CPU but NB at 2000 or 3000MHZ?

[EnJoY]

so you guys going to fund all this work? each loop takes over 1 hr at each speed...6 loops = 1 whole day.

Just paypal'd you a few quid. Get back to work!

[chew*]

Heh at those speeds try running your HT lower and recompare.

[massman]

post it up

Test settings:
Core frequency: 3000MHz
HT frequency: 200MHz
Northbridge frequency: 1800MHz
Memory frequency: 400MHz (1:2 divider)
Memory timings: 4-4-4-10 2T Ganged

Variable:
HT Link frequency (200 - 1800MHz*)



I'm running a lot lower frequencies though, but the general trend seems to be upwards to me rather than no increase at all let alone decrease. Could you do a run matching the settings I've used and HT Link at 1G and 1.8G?

I have no solid data of the HD 3300 IGP findings, but it seemed that increase the HT Link frequency to 2.4G+ helped me gain quite a bit. Even in the 3DM-V benchmark, I went from 674 to 716.

[salad]

Phenom II Processors and DDR3 Memory: http://ixbtlabs.com/articles3/mainbo...2-ddr3-p1.html

No benefit at low clocks, at 3.7 GHz noticeable difference with DDR3 1600

[Tony]

Test settings:
Core frequency: 3000MHz
HT frequency: 200MHz
Northbridge frequency: 1800MHz
Memory frequency: 400MHz (1:2 divider)
Memory timings: 4-4-4-10 2T Ganged

Variable:
HT Link frequency (200 - 1800MHz*)



I'm running a lot lower frequencies though, but the general trend seems to be upwards to me rather than no increase at all let alone decrease. Could you do a run matching the settings I've used and HT Link at 1G and 1.8G?

I have no solid data of the HD 3300 IGP findings, but it seemed that increase the HT Link frequency to 2.4G+ helped me gain quite a bit. Even in the 3DM-V benchmark, I went from 674 to 716.

so your not OCing HT you are starting from an under clock and pushing to stock speed....i was overclocking HT to see if it gained the same way NB does.

Apples to oranges m8...clock HT from 2000 to 2600 and show us what you find

[Tony]

Phenom II Processors and DDR3 Memory: http://ixbtlabs.com/articles3/mainbo...2-ddr3-p1.html

No benefit at low clocks, at 3.7 GHz noticeable difference with DDR3 1600

they were no where near as thorough as they needed to be.

hence you only reported what you did from their review

[Tony]

Updated to add 1600 6-6-6-24 1t.

1333 cas 5-5-5-24 1t is the winner IMO...faster for PI and right with 1600 6-6-6-24 1t for encoding.

Who needs 1800+ ram 8-8-8- on AM3....? No me

[shaolin95]

Tony, you think I could run this
at ddr1333 cas 5 with some voltage without killing them?

[Nedjo]

Tony this is absolutely amazing work!!

I have two requests if possible?!

Could you add voltages for achieved frequencies and latencies in the graphs legend?

Could you add DDR2 1066 CL5 (or CL4 if it's squeezable), and DDR2-800 CL4?

[tiborrr]

Tony, can you strap your OCZ Cryo-Z on your Phenom, clock it to around 4.3GHz and re-compare?

[roofsniper]

anyone have any idea what the performance of 1333 c5 or c6 would compare to ddr2 1066 c5?

[Nedjo]

anyone have any idea what the performance of 1333 c5 or c6 would compare to ddr2 1066 c5?

hopefully Tony will give us the answer

[roofsniper]

hopefully Tony will give us the answer

lol tony has done so much already. i think this thread should get a sticky or something because lots of the info is pretty nice.

[Tony]

Tony, you think I could run this
at ddr1333 cas 5 with some voltage without killing them?

Not got those...will ask what IC and see if I have something close.

Tony this is absolutely amazing work!!

I have two requests if possible?!

Could you add voltages for achieved frequencies and latencies in the graphs legend?

Could you add DDR2 1066 CL5 (or CL4 if it's squeezable), and DDR2-800 CL4?

I have voltages mapped out BUT the cas5 1333 and cas6 1600 is using Hypers and they make ram clocking very easy for the CPU-NB so it may not be usefull for those with PSC or Micron.

Tony, can you strap your OCZ Cryo-Z on your Phenom, clock it to around 4.3GHz and re-compare?

watercooling only...I can do 4GHZ but i posted where most will land with 955/945 and 925's and thats 3.6>4GHZ...so I picked the middle

getting back to voltages, i can post some work with the Animal Kit i have here as i know thats LV Micron..BUT my cpu maybe better or worse than what you guys have

[shaolin95]

Not got those...will ask what IC and see if I have something close.

Thats awesome Tony!
Thanks for the support...I expect to get a Cryo soon too!

[demonkevy666]

yea whats the option called that lets you split it? im too lazy to go look. and how would it be useful for inter core links?

it's in the advance hyper transport options

2x lckl mode

( I can't remember my rib got botched by ati 9.4 drivers I can't boot in to windows :/ )

[Nedjo]

I have voltages mapped out BUT the cas5 1333 and cas6 1600 is using Hypers and they make ram clocking very easy for the CPU-NB so it may not be usefull for those with PSC or Micron.

My local supplier have LVs (DDR3-1600; 2x2) on stock but how can I know will they run DDR3-1333 CL5?

[massman]

All this low-latency overclocking made me fire up the GD70 rig again: 700MHZ CL5 1.65v easy



http://www.madshrimps.be/vbulletin/f...51/#post238204

[SKoob]

I'm really struggling to get my NB past 2.6 and even at 2.6 is seems to need over 1.3V at the NB I noticed my 3dmark 06 score @ 3.9GHz Core, 2.6 @ NB and HTT @ stock scores had gone down in comparison to 3.9Ghz Core with HTT @ 2.4

[Tony]

NB clocks:

2000 0.95V
2200 1.125V
2400 1.2V
2600 1.25V
2800 1.3 to 1.35 depending on memory IC
3000 1.4125V

watercooled

CPU clock on MSI GD70 and Asus M4A79-T

4000 1.4 to 1.425V
3800 1.3 to 1.35V
3600 1.25V
3400 1.2v
3200 1.1v

4000 and 3800 depend on NB clock also and memory used.

Clocking on the DFI 790FX M2R:

CPU clock

3200 1.05V
3400 1.125V
3600 1.2V
3800 1.25V
4000 1.35V

this with the new LV Blades...

The DFI rocks for 955 clocking using multies and HTT to around 250.

The GD70 and Asus will do HTT over 300.

[roofsniper]

how did u get 4ghz on stock volts?

[Tony]

On the DFI...tweaking I suppose or just an awesome CPU with 10C water cooling it.

I will say this...you guys need to set the CPU's to stock speed and find the lowest voltages needed for stable operation. This took me 2 hrs.

Then leaving CPU speed stock with the lower vcore you found (Important) increase NB clock 1 multi and test again noting the voltage needed. 1 hr more testing.

Then NB up another ...then another....then another...you get where i am going here

I did this all the way to 3GHZ NB.

Now set the ram at say 1333 6-6-6-24 1T, set the Nb at 2000 with the voltage you found stable and find the lowest voltage for the ram thats stable....i bet now if you wanted you could lower the NB voltage 1 notch and still be stable I was able to get 1333 stable with 1.5v on the MSI and then lower the NB voltage a little.

Do this all the way up the NB clock range...Vdimm will change as you clock up. Make notes as this took me 1 day.

So now you have 1333 voltages for the memory at each different Nb clock speed...do the same for 1600 7-7-7-24 1T.

Once you have all that data down, you now need to find what voltage is needed at each CPU half multiplier up you set, keeping in mind you may need to adjust Nb voltage and vdimm again...but if anything its only tiny changes...remember make notes.

Also consider an increase in 790Chipset voltage to around 1.25>1.3V...it helps.
I also found SB voltage can add stability going up 1 notch.

So now you map out Nb clock with the CPu at stock and now CPU clock with the NB at stock...lots of work.

Next map out CPU and NB clocking with ram at 1333...then at 1600 and make notes of all settings.

I did all of this and found the DFI clocked the 955 like a demon, i actually managed 1200 with 4GB ram 1.8V or so with the CPU at 1.25v 3.8GHZ in Vista 32 bit.

Here is the killer punch to all this though, what you need in 32bit OS is totally different to what you need in 64bit OS...64bit needs more juice.
I am testing W7 64 now and 4GHZ is not coming any where near as easy on the DFI as it did with V32...keep this in mind.

so now you know how Tony does his testing

[gOtVoltage]

I'm really struggling to get my NB past 2.6 and even at 2.6 is seems to need over 1.3V at the NB I noticed my 3dmark 06 score @ 3.9GHz Core, 2.6 @ NB and HTT @ stock scores had gone down in comparison to 3.9Ghz Core with HTT @ 2.4

Have you tried with HT @ same as NB?

Also sometimes you must ADD some volts to the NB(CHIPSET) sometimes labled CORE PCI-E voltage. Usually when the Speed drops off on the NB or HT@ a given Higher NB freqency its one of two things,, not enuff volts to IMC or NB is getting to Hot @ that freqency.

Tony has displayed the Volt ranges for NB/freqency. If your using More than 1.3v on the CPUnbvolts,, it could be the MOBO just needs more for it to work. Some will use less and others More. In genaral you should be able to come close to same volt range if your temps are not too shabby.

Now while your playing around with volts you can try some more CPUx Multi's . See which one lets the system run faster while using 2600NB with closer to same ram timing. Once you find it Then try raising the HTT 1mhz at a time. Soon youll be going to 2700/2800mhz on the NB. small steps not leaps

If your clocking HT @ 2600 with NB @ 2600 using NBmulti . try to go one step lower on HT . Remeber to Give the CHIPSET a hair volts over the base volts when pushing High Clocks and High HTT . This just may get you 2700/2800 when you add HTT to clocking the NB higher..

[Tony]

leave HT at 2000, no need to adjust it.

[tiborrr]

Gotta try 800 CL5-6-5-18 on my memories when i get home!