HOW to Overclock AMX2 4850e

[emmalana]

I have Never Overclocked before I am Curious just to tweak ~ Slightly Overclock (NOT OverCOOK)this NEW PC
AM2 4850e, GA-MA78GM-S2H, 2G 800DDRII, 500G SATA, Antec Sonata Designer 500W PS
Has anyone done this recently to the 4850e WITHOUT Changing the Stock CPU HSF etc.
Please Provide Opinion Step by step Instuctions
OR Is it worth it?

[cbjaust]

I reckon that the simplest thing you could do is to get into the BIOS and set HT to 224MHz.

To get into the BIOS it is probably the DEL key you hit during POST.

then you might have to CTRL-F1 to unhide advanced options throughout the BIOS.

While you're there check on your RAM settings; for DDR2-800 it is desireable to set CL-TRCD-TRP-TRAS to 4-4-4-12.

That will have your RAM running at its stock frequency of 400MHz (CPU/7) and the CPU at 2800MHz (12.5 x 224).

if your RAM is CL5 stuff to get CL4 you may have to set vDIMM to 2.1v. The CPU should be fine on stock volts.

Cheers

[emmalana]

Sorry it took a while to get back...............
THANKS for your Tip

I tried what you said BUT All I could really do was Change the HT Link Freq to 200 Mhz (from Auto)

As for your other suggestions I could NOT Get into... (unhide Advanced options) Therefore I couldn't adjust Ram settings It was set to DDR2-800 to Change the CL-TRCD etc etc.....I dont know what this means I guess something to do with the Latency etc
for your onfo I have this fancy Ram from Umart
Team Elite 2G Kit(2x1024M)PC6400 800Mhz

Product Description:

* As a well experienced memory module developer, Team is never second in the development of standard memory modules. Its Elite DDR200-800 is such a breed to welcome the advent of the x956 and Socket AM2 architecture. More importantly, the Elite DDR2-800 from team has passed the compatibility verification of the top three domestic motherboard makers.
* The Elite DDR2-800 is a standard 240-pin DDR2 module with a working voltage of 1.8V. It is delivered in 512MB and 1GB models conforming to the JEDEC (Joint Electronic Device Engineering Council) standards. By using the leading-edge 0.70μm process and FBGA packaged DDR2 die, Team has reduced the spherical contacts between the IC die and baseboard and so effectively lowered the die temperature and data noise while working at high frequency.
* In order to save the problem of matching in dual-channel application, the Elite DDR2-800 has kit packing at different capacities to meet the needs of consumers. By equipping the module with the coated surface heat-sink in silver color and the red logo Elite, Team displays the design concepts, forefront technology and stylish beauty on the product to continue the super speed, optimization and esthetics orientations of the organizational products style.

What about these other settings i the Intelligent Tweaker
VGA core clock control
CPU Clock Ratio
CPU Host Clock Control
CPU Freq

This is my First time I dont want to bugger anything up
i.e. "Nothings broken So I dont need to fix anything".......I am just Curious IF I can JUST tweak it slightly

I didn't really notice anything differant from just changing the HT from AUTO to 200Mhz

[cbjaust]

OK, the MB intelligent tweaket is where you need to be.

HT Link Frequency needs to be set at 1GHz - I have a feeling that you changed this setting to 200MHz yeah?

The setting called CPU Frequency(MHz) is what you want to change to 224MHz.

so the RAM is Team Elite TEDD2048M800HC5DC I guess leave it set at what it is which I ecpect would be 5-5-5-15 2T at 1.8v.

VGA core clock control is for the operating frequency of the on-board graphics - you can try overclocking that at a later stage if you want. Are you using the on board VGA?

CPU Clock Ratio is set on Auto right now? Just leave it there (it'll be 12.5, the default multi for your 4850e.)

What settings are available under the CPU Host Clock Control menu?

Cheers

[mitch79]

When in the BIOS main menu you need to press Ctrl+F1 to unlock the advanced options.

EDIT: Ignore me. It was mentioned in the second post.

[emmalana]

Hi There Again
I Followed your Instuctions
HT Link Freq Set to 1Ghz
CPU Freq set to 224Mhz
The Ram is set to 800DDR
CPU Host Control set To MANUAL to enable me to change settings (was on AUTO)

Under the Sub Heading SYSTEM VOLTAGE OPTOMIZED
DDR 2 Volt Control - set to NORMALNorthbridge Volt - set to NORMAL
CPU Voltage Control - set to NORMAL
Normal CPU Vcore - set to 1.2500V

Cannot see IF any significant Differance yet, How can I tell?

[emmalana]

By the way I Have a dedicated Video Card ATI 3450/512

Also What should the PCI Clock be set tp at present set to AUTO
Options 101 ~106

I forgot to mention My options for Sys Voltage Optimized
DDR2 Now (set to Normal)
Options +0.1V, +0.2V, +0.3V

Northbridge
Options +0.1V, +0.2V, +0.3V

CPU Voltage Control
Options 1.6000V ~ 1.9000 in .500 increments

[cbjaust]

so its working fine at 224 x 12.5 = 2800MHz for the CPU and 2800 / 7 = 400MHz for the RAM?

If so that's good.

Up to you if you want to find the limits or just be happy with it as is.

Cheers

[emmalana]

The mulitiplier was set to AUTO Have Changed this NOW reading 2.8Ghz GOOD

BUT With regards to Ram MY options ate to Change the Voltage

The other setting under Clock memory was DDR 400 ~ DDR800 it is set to DDR88
What did you mean - 2800 / 7 = 400MHz for the RAM?
Where do I see or adjust the Freq to 400Mhz?

[emmalana]

Quote
VGA core clock control is for the operating frequency of the on-board graphics - you can try overclocking that at a later stage if you want. Are you using the on board VGA?

Currently this is set to default at 500Mhz (Range is 150 ~ 1100Mhz)
Should this be adjusted upwards?

I am using a ATI 3450 card SO I am Not sure IF using Onboard VGA or not ...............AS I thought the features/benefits of this Mobo was that I am using ONboard IN combination together with the PCIE 3450 therefore It wasn't necessary to buy a bigger card.i.e. 3650
etc

I AM NOT GAMING AT PRESENT

ALSO
How can I improve the Aero Graphics performance? presently a rating of just 3.6

I downloaded the latest ATI Catalyst drivers etc

[cbjaust]

Originally Posted by emmalana

The mulitiplier was set to AUTO Have Changed this NOW reading 2.8Ghz GOOD

BUT With regards to Ram MY options ate to Change the Voltage

The other setting under Clock memory was DDR 400 ~ DDR800 it is set to DDR88
What did you mean - 2800 / 7 = 400MHz for the RAM?
Where do I see or adjust the Freq to 400Mhz?

* DDR800 refers to the data rate of the Memory which is two times the actual operating frequency because Double Data Rate SDRAM can transmit data 2 times per clock cycle. I usually always talk in terms of the actual operating frequency. *

So your CPU on its default multiplier of 12.5 (or you can set it to 12.5 in the BIOS) x the HT (or whatever your BIOS call the setting) of 224 = 2800MHz for the CPU frequency.

The actual RAM frequency is determined by the CPU frequency divided by some integer. This is because with the K8 architecture the memory controller was moved off the mainboard onto the CPU die and in the case of K8, runs at full CPU clock speed.

Now RAM cannot run at CPU core speed so there is a divider that is applied to come up with the final RAM frequency.

The divider for AM2 is determined by the CPU multiplier multiplied by 0.5 multiplied by the RAM ratio. The RAM ratio is usually expressed in the BIOS as the rated DDR speed of the RAM so DDR2-800, DDR2-667, DDR2-533 and DDR2-400 which really translate to the ratios of 1.0, 1.2, 1.5 and 2.0, respectively. The final kicker is that the RAM can never be set to run faster than its rated speed and the divider must be an integer so the calculation for RAM divider is: CPU multiplier x 0.5 x RAM ratio -> ROUNDED to the next higher integer.

In your example with your overclocked CPU your memory will be running at its rated frequency of 400MHz (DDR800) because 12.5 x 0.5 x 1.0 = 7 (6.25->7) and 2800 (12.5 x 224)/7 = 400. Easy. Check it on the memory tab in CPUz (cpuid.com)

If for example you had DDR667 RAM, in the BIOS the memory divider would be set to DDR667 and you would get a RAM divider of 8 (12.5 x 0.5 x 1.2 = 7.5 -> 8) and so the memory would be running at 2800/8 = 350MHz (DDR700)

Long winded, but I hope this clears up your question...

Cheers

[cbjaust]

Originally Posted by emmalana

Quote
VGA core clock control is for the operating frequency of the on-board graphics - you can try overclocking that at a later stage if you want. Are you using the on board VGA?

Currently this is set to default at 500Mhz (Range is 150 ~ 1100Mhz)
Should this be adjusted upwards?

I am using a ATI 3450 card SO I am Not sure IF using Onboard VGA or not ...............AS I thought the features/benefits of this Mobo was that I am using ONboard IN combination together with the PCIE 3450 therefore It wasn't necessary to buy a bigger card.i.e. 3650
etc

I AM NOT GAMING AT PRESENT

ALSO
How can I improve the Aero Graphics performance? presently a rating of just 3.6

I downloaded the latest ATI Catalyst drivers etc

So can you do hybrid crossfire (or whatever it's called) ? How does it work with the connection to the monitor? Do you connct to the motherboard video out? What if you have two (or more) monitors?

I don't use Vista (or as the Inquirer likes to call it: malware and DRM infested Broken OS) but I would say that maybe if you add voltage to the Northbridge and raise the graphics core clock up from 500MHz you might see an increase in your performance index.

cheers

[Daedalus01]

Originally Posted by cbjaust

I reckon that the simplest thing you could do is to get into the BIOS and set HT to 224MHz.

To get into the BIOS it is probably the DEL key you hit during POST.

then you might have to CTRL-F1 to unhide advanced options throughout the BIOS.

While you're there check on your RAM settings; for DDR2-800 it is desireable to set CL-TRCD-TRP-TRAS to 4-4-4-12.

That will have your RAM running at its stock frequency of 400MHz (CPU/7) and the CPU at 2800MHz (12.5 x 224).

if your RAM is CL5 stuff to get CL4 you may have to set vDIMM to 2.1v. The CPU should be fine on stock volts.

Cheers

is there a reason why you sugested 224fsb instead of 224mhz fsb? i am trying to overclock mine ,and currently the max ive got it is 224mhz fsb with 1.3v . any less voltage and it wont orthos properly

[cbjaust]

Originally Posted by Daedalus01

is there a reason why you sugested 224fsb instead of 224mhz fsb? i am trying to overclock mine ,and currently the max ive got it is 224mhz fsb with 1.3v . any less voltage and it wont orthos properly

HT set to 224MHz gives correct ram freq. of 400MHz...