This card is very interesting...
This card is very interesting...
They are out, just not available in retail.Quote:
Originally Posted by Clint
I think we are all thinking the same, I am just surprised to see stock voltage achieve this kind of clock (when compared to other cards).
Sorry about the confusing post.
Yes, and I tried with XFX's 9.5 drivers for HD4770 yesterday. Still can't clock the mems over 860MHz. Must be a POS batch.:shrug:Quote:
Originally Posted by Astennu
Oh well, they are going back and the XFX dual slot version is taking over the job anyway.:up:
You should check the voltage on that memory. The chips are rated at 1Ghz and I get 1.2Ghz out of mine.Quote:
Originally Posted by Clint
Yes, that was one of the first things that came to mind. Couldn't be bothered though, if that's the case then they are defective anyway.:shrug:Quote:
Originally Posted by Quailane
How did you force it as a HD 4800? I suppose you must have some kind of hardware-ID for the HD 4770 card?Quote:
Originally Posted by Astennu
As for the Sapphire's, they have been sent back. I now have a XFX HD 4770 with the reference cooler WITHOUT the heat pipes...!!!
They have actually shipped the card without the heatpipes, now there are two holes there instead. :shakes:
Anyway, the card will not do more than 920MHz on the core...no matter what volts I give. That's with the ASUS TOP bios. Temps are very quickly climbing up towards 90C when above 1 volt. The memory is maxing out at 880MHz, same :banana::banana::banana::banana: as the two Sapphires I got. The modules are Qimondas idgv51-05a1f1c-40x, that is rated to 1000MHz.
I will try the new Catalyst 9.5 that is supposed to be released today, and also try forcing it as a HD 4800...if no improvment is made on the memory I will ditch the whole idea with a HD 4770 and not look back.
very nice hoping to see other 40nm soon @ action
it seems the drivers for xp dont work with overclocking the ram, they overclock well for me in vista/7 but cant go above stock on xp.
HD 4770s are cheap, got high overclocking potential and perform really well - considering their price. :up: ATI HD 4xxx was definitely one of the best hardware in 2008. I'm glad that ATi created some nice cards to carry on the legacy :cool:
Lets hope this is the reason. my powercolor 4770 is at 800 and cannot go up or even down. not even by 1MHz !!!!Quote:
Originally Posted by revogamer
i will try on win7 but i am waiting for 9.5 drivers.
geia sou patrida!Quote:
Originally Posted by George_o/c
so it is confirmed! In win7 64b and latest 9.4 drivers the card can be easily OC 850/830Quote:
Originally Posted by acos
yes the memory cannot go far, but it's ok. Thus it was a matter of drivers i guess. Better drivers better OC ;)
How can 830MHz on the memory be ok when the reviews all did 1100+??Quote:
Originally Posted by acos
I just got my XFX 4770 w/ ref cooler. I got it at 830c/850m with no problems under vista 64 w 9.5 drivers.
I might try the asus bios and see if i can go higher, but I'm hesitant.
Do you guys think the memory needs heatsinks on them.
But so far so good, I went from the 4850 to 4770. overclocked it is def. smoother. Not to mention i maybe able to get more out of her.
i meant that it is good that i managed to have any OC on memory.Quote:
Originally Posted by Clint
I can only use the tool from ATI catalyst since rivatuner never worked for me :(
As for the memory chips, i saw from the chip maker that those particular
chips can reach the limit of 1000MHz with the reference voltage of 1.5V.
The max safe voltage can be 2 volts. but i didn't saw any reference to any heatsinks.
I believe that the PCB design is efficient enough for the memory chips to be cooled by the airflow of the fan. so little room for heatsinks !
Got my 4th HD 4770 yesterday and finally I hit a flawless card. It does 1200MHz Furmark stable on the RAM, with the Asus TOP bios. I can even get it up to
1215MHz before it starts to show a couple of minor dots in stresstesting. This is with a XFX card and the crippled reference cooler, meaning it doesn't get any cooling or airflow at all over the memorychips.
Core does 880MHz at 1volt, which is default for the XFX cards. It is quite obvious that these 40nm chips are very sensitive to heat, anything over 65c and it freezes. This crippled cooler is really crappy, card gets hot like hell. It picks up a lot of heat from the scorching RAMs as well.
I will do some modding to the card later on this week, looks like it has some potential.:up:
Considering the cheap components of the board, can this card handle high volts? This cards seems specialized for low energy consumption and considering the cooling on this board, what long term effect will this have?
great results. but what voltage do you apply to RAM? Can you change the volts ofQuote:
Originally Posted by Clint
core and RAM indepentently?
Unfortunately i cannot flash my Powercolor to ASUS top firmware, it says that it is not
compatible, or something like that. Maybe i have to try a special firmware update tool.
RAM voltage is stock, I assume 1.5 volt.Quote:
Originally Posted by acos
I'm pretty sure you can flash your card, use atiflash with switches -f -p to force it.
"atiflash -f -p 0 biosname.bin" (without "")
Thanks Clint, i will try it.Quote:
Originally Posted by Clint
about the RAM voltage mine it is reported as ~1.25V. so it isn't 1.5V or i get a wrong report.
Pretty moce cards man.New ATi cards seem to overclock great.....
Can't wait to see more of these two little babys...
Clint, how did You bybass the 1200MHz limit? Is there any possible way to go over 1000MHz on GPU also? If I changed the limits on Asus TOP BIOS, then the drivers can't "read" the card (known problem with most HD4xxx series).
After maxing out the CCC I went with Rivatuner, no problem passing 1200MHz there. As for core I haven't even tried so high, need better cooler first. I doubt it will do 1GHz though.Quote:
Originally Posted by ceemic
Clint, tnx for the info! So in theory, with RT we can go higher than 1000MHz on GPU also :rolleyes:
sapphire HD4770 crossflashed w/ asus TOP bios, vgpu@1.261v
Thermalright gpu + memory heatsinks:
@1000/1150:
http://img191.imageshack.us/img191/2936/10100.th.jpg