my card games at 700 with just 1.158v no problem so I'm hoping I can get to 750 with just 1.2v so I don't have to hard mod, but I can always do a pencil mod if necessary
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750 with pencil mod is quite simple. Just draw a line, and you are good to go for several hours:
http://i235.photobucket.com/albums/e...m/246e6942.jpg
Hey!Can someone give me a modded bios because I don't want to take the risk of modding a bios on my own? Thanks. :)
My card is a Sapphire 4850 and gets to 680 core 2300 mem out of the box (watercooled). :) Anything above 680 causes Fur Benchmark to freeze in 2-3 seconds.. so I guess I need more voltage.. :)
Take a pencil and draw some lines, then see if you can get 700MHz stable or not. Designate your overclocking goal.
I can give you my own BIOS (which gives 150/500 idle and 750/1100 load) but it's from a Powercolor card, and I have no idea what kind of effect it may have on a Sapphire card. Just take your own BIOS out, and modify it. It's safer that way.
What type of pencil should I use for the mod? Can you give me a screenie with the points I need to connect with the pencil?
900/1225 seems pretty stable so far, 1.41v load gpu, 2.07v memory. using msi bios on my visiontek.
it is weird though cause i was able to do 14200 on 3dmark06 w/ my ide 120gb hard drive w/ fresh install of windows w/ speeds at 855/1150.
i can only do 13980 w/ my card at 900/1225 w/ my 640gb raid setup using 7200.10. i wonder if i have some other app open that is hindering my score.
Just wondering, what does your 640gb hdd show up as in windows, mine only shows up as 596:mad: If anything that should be an advertised 600gb, losing 44gb is rediculous
That was without any vmods, I just told ccc to auto tune, and took me to 700/1100, I could have gone higher on the memory but I actually clocked it down since I have no need for that high speed memory, and don't want to risk killing it.
If you are gaming at 1280 x 1024, or you are satisfied with Crysis, then you don't need to spend more. If you want more score on... say... 3DMark Vantage, do spend more. It's only $26 extra to get close to, or if you are lucky, above 4870 performance.
Well I have two of these bad boys arriving early next week so hopefully I'll have them well over 700 MHz....I'll have my MCW60 blocks on them as well. I have a LOT of copper BGA RAMsinks to go on the memory and PCB components too.
Same trend here with my xfire 4850's
Did some testing with these cards last night on 3D mark 06 , i ran the tests a few times with my cpu @ 3.8Ghz and as i clocked the cards over a certain point the scores started to get worse
Q6600@3.8Ghz
750/1050 = 20229
800/1075 = 21328*
825/1100 = 21199
850/1080 = 21103
Very odd, if thats the case then i might back down my 1.4v to 1.25 if its not getting me any faster speed.
I need to try it in some other games/test.
It's not that unusual, ATI relaxes the ram timings as you clock it higher, also you might note the cards ram needs to clock up in 25mhz jumps. They sync at intervals of 25 so keep the freqs divisable by that number.
The core is also affected by the same problem, this has been true since the 1900's AFAIK. find out where it performs best ( the factory setting is a clue.) then stick to the ratio. I would tell the number but I am going for some cups this weekend and I need all the tweaks I can to get past Gomeler.
I think this is CPU-wall
See for CPU loading during the testing: I have a core fully loaded after GPU=825MHz , and the second core why it is used at 2-7% :shakes:
It's my testing:
http://images.people.overclockers.ru/160526.gif
I have also experienced the problem mentioned but Ive been using 3dmark vantage to check. This happens exactly around 800-850mhz. I havent got any higher. Also, the memory clock speed seems to have a large effect at this point.