I have a ATI radeon x1300 256mb Graphic card with default 450mhz core clock and 500Mhz Memory clock .

I had overclock it to 650Mhz Core clock and 300Mhz Mem clock and still going higher stable without artifact in stock voltage .

1. Does 200Mhz overclock spoil my graphic processor ?

2. ATI x1K series using what gpu and what is the maximum theorotical Overclock for it ?

I just scare that when it reach it Clipping , the processor would just Spoiled.
Anyway , overheat is not my proble because i have a big (Noisy) industrial 12cm fan blowing on it . with another Cooler master ViVa cooling Heat sink on it . The core hardly reach 60 celcius on load .



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EDITED : ADD SOME MORE STUFF ABOUT ATI R520 core
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Just Some Somple Introduction to ATI X1K series:

ATI's "R520" or Fudo core is the foundation for a line of DirectX 9c 3D accelerator x1000 video cards. It is ATI's first major architectural overhaul since the "R300" core and is highly optimized for Shader Model 3. The Radeon X1000 series using the core was introduced on October 5, 2005 (From Wikipedia)


And some from http://www.tweaktown.com/articles/835/1/page_1_introduction/index.html




According to my statistical reasearch Most people just Bump up their GPU core to the max with Some Tweaking Program like ATITOOL or ATITRAYTOOL to get better performance ( OF course Void Warranty ... Unless You Insists)....

But what we don't normally Know is the CRITICAL VALUE for a certain Core Before we Judge it best for certain uses like gamming ...

I had Try My Overclock X1300 Graphic card yester day with ATITOOL and it Reach 680Mhz before the computer detect Artifacts and then Hang . ( of course with Coolermaster Cooling Viva VGA cooler , not stock )
It is a 230Mhz overclock for my 450Mhz Default Clocked Card .

From the Series Intro above , it have Much more overclock than the X1300Pro Series which had it default clock set at 600MHz.

This probably means , Across the same X1300 Family or the RV515 family the critical Maximum Clock is 680MHz ....

Then I had Some NEW Question :

1. Can anyone Find The Critical Maximum Clock for other X1k series core as well .

2. Do Overclocking Ability of a graphic card is limited by its Graphic card Board ( Like Processors on certain motherboard ...... Limits to most 3.8 to 4.2 max clock )

3. Can a Overclocked Low end Graphic card out perform the higher end graphic card ( Like my case , X1300 series 450mhz to X1300PRO series 600MHz) across the same core and save money ? Assume the Memory is overclock as well .

4. it seems that 700MHz is the Manufacture set maximum core speed for R520 Family core . (RX1800 XT PE R520 @ 695MHz) Is that true that All X1k series graphic Card cannot reach the speed as fast a current computers ? Or they want to save the price to use BIG heat SINKS for Cooling ?

Thanks

This post has been edited by RIGmaster: Jun 16 2006, 12:47 PM

use Atitool.it's can help ur to auto oc ur gpu/mem

how much water cooling can keep the GPU tempreature down?

well dude i gotta tell u, the 1k series are REALLY HOT. in other words smokin..
u have to find a good alternative for cooling down ur card.
thats probally a must dude.
anyways there is no certain way that we can assure u of the highest clock speed for ur GPU. its really on ur luck and of course ur setup.
best is use ATI Tool and see how far that can bring u man

Ha ha you are rite , but i oc without liquid cooling ...

Hot Hot x1k series and the company produced it use chiplak heat sink for it ... how bad ...

this apply to my 9550 agp series also ... with that Punny heat sink , you never get that O.C to its max ...

Nevermind , since my comp have good ventilation for cool and hot air exchange , i just want to clock clock and overclock my baby ... who cares the warranty ...

Just want to know the theoreotical maximum clock .

Example for the same series of x1300 , the one i bought is 450 mhz and the pro series is 600mhz ... since i had go beyond 650mhz , that means there is oc potential to a higher performance ..... just how max is max ....

Like the XTX series ? 1Ghz possible ?

If that is possible , then i buy liquid cooler .

No matter how you oc.. it is x1300 the hot stuff.. dun waste money buy liquid cooling.. go get better gc lor..

Still Seeking for Higher Overclock speed for my graphic card ... I think Extreme cooling wont help because the Maximum Manufacturer set Clock for RV515 is 600MHz ... I am lucky for my Baby to Run at 680Mhz Max Clock . A 80Mhz Clock diffrent from X1300PRO series and a Real 230MHz overclock for my 450MHz Baby ...

Anyway , if anyone of you have The x1300 Overclock more than 680MHz , Welcome to tell me ... at least the Extreme cooling is Possible to Drive it harder to the MAX !!!

no im sorry but there is NO WAY on EARTH that u can reach that dude...
even if u are lucky, people are using phase change to cool down the card ><

1. Can anyone Find The Critical Maximum Clock for other X1k series core as well .
There are no such thing as critical max clock, every graphics card overclock diffrently, even if you bought two identical cards at the same time both card is diffrent from each other in terms of core production date and memory.

2. Do Overclocking Ability of a graphic card is limited by its Graphic card Board ( Like Processors on certain motherboard ...... Limits to most 3.8 to 4.2 max clock )
Overclocking I think didnt effect much from motherboards but it did effect from PSU (at least at the high-end segment) my 450W PSU struggle to give enough power to my X1800GTO. The memory timing and voltage on the card also play important role in overclocking the memory

3. Can a Overclocked Low end Graphic card out perform the higher end graphic card ( Like my case , X1300 series 450mhz to X1300PRO series 600MHz) across the same core and save money ? Assume the Memory is overclock as well .
X1300 to outperform what? X1600? Probably yes or not because like memory bandwidth and fill rate (X1300 and X1600 share the same amont of TMU and ROP, but the latter have 3x pixel shader,ring bus memory, twice Z-Compare unit) dont even think that X1300 can beat X1800 or X1900s


4. it seems that 700MHz is the Manufacture set maximum core speed for R520 Family core . (RX1800 XT PE R520 @ 695MHz) Is that true that All X1k series graphic Card cannot reach the speed as fast a current computers ? Or they want to save the price to use BIG heat SINKS for Cooling ?
Thats not true, this is because at some point the graphics core is just give a little bit performance boost above that speed but expell tons of heat and uses lots of power. I think manufacturers test their X1800 series and found out that above 700MHz is just not worth it if heat and power consuption comes to the equation

I think I saw somewhere that X1800 hits the 1GHz barrier but it uses Liquid nirogen I believe

My X1800GTO at 1.1V overclocks to 540MHz, 1.2V 600MHz above that I didnt dare to try anymore since I dont have sufficent power (last time I try 1.3V 661MHz). The memory stock 1.9V goes up to 621MHz and 2.2V 711MHz and thats with Samsung BC20 memory (2ns)

Ehm ... a good Reply !!! i like it . may be other can give some opinion as well .


Anyway , i have a 480Watt extreme pawer PSU and going to have 550watt Pure power PSU ... Power is not a concern for me .

What i mean for "critical Limit" is that how high is high before a signal cannot be read under normal voltage , normal Temperature and perfect stable PSU condition ... thats what i am looking for . For Upping V core , this already creates another limits .

This also called "transistor reflex stress test" . Just to test out the maximum clock stress it can handle under normal condition . The responsiveness of transistors is the main "disability" that Processors cannot be clocked too high ( other than absolute cooling where upping Vcore involved ) . As we know , Signal not usually "square" as thought in 0 and 1 . The heading of the signal is usually sloppy . when the time for a pulse of signal strength above "good" signal is not enough long , the signal is not "read" .

So , try not to confuse the whole thing ... Everyone can clock it high with awsome cooling and Vcore extremes . every Vcore have limited "max clock" under normal conditions , and that will be too big issues to be discussed in this place .

One more thing , What i mean motherboard and graphic board are two diffrent thing . one supports the GPU and one supports the CPU . Although not much effect from the motherboard but what about the graphic board ?

Two identical graphic card may have two diffrent production date and memory , but still , the overclock diffrent between the two wouldnt be much ( except for two total diffrent memory (GDDR2 or GDDR3) ) The idea of this post is to post their maximum clock for each Vcore clocked under certain condition for references of others .

Anyway , i mean performance across the same core for question 3 . not two diffrent core . ( this is competition against its own core family ) all x1300 in one group (e.g. x1300 256mb<64bit/128bit> , x1300 512mb GDDR2 , x1300 Hypermemory , x1300 PRO ....... all RV515 core) not fighting core against another core like compare x1300PRO with x1600 . X1600 is already R530 core .

About the x1800 1ghz overclock , it is nothing to be suprise as the Vcore had been Up higher than normal and of course need nitrogen cooling to prevent "electron tunneling and capture" under high voltage in silicon product which would just "destroy" the silicon bridge in product .

It seems that your x1800GTO could perform better if your power supply is more stable .... Try the enermax or cooler master Real power series .

Anyway , I just benchmark my graphic card yesterday .
Program - 3Dmark2003 patch 360
Graphic card - x1300 256mb DDR2 450mhz core oc to 650mhz
CPU - p4630 3.0ghz oc to 3.4ghz with 1024 DDR400 kingston ram .
3D Marks - 5320 marks .

Sad sad ... low marks .. i think my 480watt is not powerfull enough , i will go for more next time ... a 550watt perhaps .

Thanks for all the replies.

I knew I must be wrong about some of it. Especially the critical clock one. I still dont understand it though. My X1800GTO is perfectly stable at 1.2V at 612MHz on 3DMark06 but it failed in CoD2 even at 607MHz it just hang in the middle of the game, so what is the critical clock?

The graphics PCB also play important roles in overclocking, some manufacturers design their own PCB like Galaxy and Palit to overclock higher.

Now against the core family, the X1300 can outperform X1300Pro if heavily overclocked (assume they have same PCB and memory) but the MyperMemory cant outperform it because lacks of memory bandwidth

Your computer really have a Power supply stability problem . bare in mind , 3D mark stress each independent component to the max and therefore have component performance benchmarking ... But COD not doing the same thing .. is system strees . It stress all the component to the max , from cpu , graphic card and even soundcard ... there is a jump of power ussage and if the power supply cannot cope it , it tend to go lower voltage (voltage flatuation) .(this will need you to know how Switching Power Supply works ) thats why your comp needs a stable and powerfull PSU . Preferable coolermaster Real Power series or enermax PSU series

Anyway , since you oc your graphic processor , the time for a signal is smaller (it is similiar to da wavelength if you are familiar with light ) every transistor have a diffrent time recognising the "good" signal . like 6ns . if <5ns , it would not be read .

Voltage flatuation (or Surge)cause the signal peak to be lower than normal and hence when your comp run at full burst , the power will drop allittle suddenly and increase again to meet the demand . this little drop affects the signal recognising and hence "error" occours when a signal is not read properly . Bare in mind , PSU normally work 70%-80% efficiency . the rating that they state on PSU casing is usually MAX wattage . (Max wattage only supplied for only few mili second when boot up or sudden demand , not maximum performance )

Anyway , thanks for the other information as well . Maybe i should go for Galaxy and Palit other than my current "PowerColor" brand haha , to overclock !!!! .

Anyway , My 480Watt is not powerfull enough even too boot up , believe it or not ?
The whole system "Dimmed" when Boot up . "A hard Boot " i called it . i going for 550watt for the next month . Haha , P4630 @3.4ghz and x1300 use 550Watt ? Believe it .. is my plan .

Powercolor is a nice brand, and so do Gecube. Among the best 3rd party for Ati line of GCs. Sapphire and His is also good with its aftermarket hsf. About ur psu, my bother for a 550w ? Go for 700w direct.

Haha , i get my Cooler Msater 550W SLI
Powerful
X1300 running at 702MHz (ori 450MHz) and RAM run at DDR2 310MHz ( ori DDR2 250MHz )
I think this is the Max theoreotical Core Clock 700MHz for RV515


700W ? Too expensive ..
And i will get it after i had my CORE 2 Quard