700mhz wall on HD4850 is smashed.

[gurusan]

just got my 4850 under water.

27c idle and 31c load

will be clocking later today

[barong]

I've uploaded my MSI bios and the modified Sapphire bios. Both are set to 710/1125MHz in 3D and 160/500MHz in 2D

http://rapidshare.com/files/12512715...-1125.rom.html

http://rapidshare.com/files/12512808...-1125.rom.html



Be sure to backup your original bios and have a automated restore floppy/usb disk at hand, should anything go wrong. Use at own risk
Make sure you have appropiate cooling!



Very,very nice!

does it works with HiS 4850 ?

[gurusan]

yes..it works with all reference 4850s

[diablos]

but is possible change the voltage?

[gurusan]

you can change the voltage up to 1.20, that's the limit on the bios vmodding




and here's something nice:






for comparison should beat the GTX 280 as the guy who has 1st has a 45nm quad @ 3.7ghz, I have a 65nm dualcore @ 3.64ghz

[Caped Crusader]

you can change the voltage up to 1.20, that's the limit on the bios vmodding




and here's something nice:






for comparison should beat the GTX 280 as the guy who has 1st has a 45nm quad @ 3.7ghz, I have a 65nm dualcore @ 3.64ghz

most impressive!! hell of a chip you got there, mate!!

[gurusan]

yup i'm very pleased with this gpu.

[Caped Crusader]

just got my 4850 under water.

27c idle and 31c load

will be clocking later today

whal bloc are you using on the card? maker, model?

thanks

[gurusan]

I'm using a dangerden maze4. my first time with this block and I've pleased. Low restriction and excellent performance.

[HousERaT]

I'm using a dangerden maze4. my first time with this block and I've pleased. Low restriction and excellent performance.

How much voltage to get to 920 on the core?

[GAR]

Thanks for the bios GURUSAN, works good on both of my cards, these cards should be killer in crossfire now!!!

[DemonEyez]

yup i'm very pleased with this gpu.

Nice going! How much are you feeding the core? and what would you consider safe for 24/7 with water?

[gurusan]

How much voltage to get to 920 on the core?

Nice going! How much are you feeding the core? and what would you consider safe for 24/7 with water?

Mixture of pencil and bios modding for:

1.18V idle
1.48V load

I set .94v in the bios for the idle state so that it would stay at a low vGPU when not in use
I think 1.5ish under water would be fine if you keep it at a low idle voltage like I did so that it's not always getting 1.5v

[GAR]

Mixture of pencil and bios modding for:

1.18V idle
1.48V load

I set .94v in the bios for the idle state so that it would stay at a low vGPU when not in use
I think 1.5ish under water would be fine if you keep it at a low idle voltage like I did so that it's not always getting 1.5v

Gurusan, with that bios you made, what can i use to get 1.4v under load to get me around 800-850mhz, can you show me a picture of a pencil mod??? keep in mind im using your bios with 1.2v load and 720mhz on core, thanks.

[gurusan]

Gurusan, with that bios you made, what can i use to get 1.4v under load to get me around 800-850mhz, can you show me a picture of a pencil mod??? keep in mind im using your bios with 1.2v load and 720mhz on core, thanks.

Check page 3 of the voltmod thread.

and update....I'm now at 950/1200 stable with the same voltage (1.48)

[biftek.]

for comparison should beat the GTX 280 as the guy who has 1st has a 45nm quad @ 3.7ghz, I have a 65nm dualcore @ 3.64ghz

haha, I bet that guy with the GTX280 below you is pissed

These cards are incredible. I'm going to pick up some after market cooling today Probably an S1 for now and eventually one of those T-Rad2's when they come out. Hopefully then I can hit some higher 700 core numbers, I'm barely making it at 730 temp wise.
Cards already v-modded for it, i have 1.28V load and 1.04 idle

[adpr_02]

Guru, did you change the voltage on your memory at all? I can't get past 1050 stable yet.

[gurusan]

yes i bumped it to 2.12v with the pencil mod.

[barong]

how about for maximum core without using pencil mods, only using RBE?

[D749]

Could messing around with BIOS flashing on a CF setup have any affect on whether the second card is utilized?

The reason I ask is that I had one 4850, flashed around with it (mostly just fan changes) after reading up on RBE, etc., and then threw in another 4850. Now the second 4850 will not fire up during gaming/benchmarking but it is detected by CCC and Vista. I even flashed both cards back to the stock BIOS.

http://www.xtremesystems.org/forums/...d.php?t=192864

Thanks.

[Jaystar]

Has the pencil mod for vmem been posted somewhere gurusan

[adpr_02]

Here you go: http://www.techpowerup.com/articles/...g/voltmods/151

Is it just me or are some of the mods unclear in this guide?

[gurusan]

the mods seem pretty clear. what are you unsure of

[adpr_02]

Well, I was just looking over it. I already did all my wiring and just need to buy the resistors, but for some of the pencil mods I can't see where you're supposed to shade in.... maybe it's just me...

OH GOD! I get it. hahaa. I feel so noob. I couldn't figure out that you have to shade around the resistor.

Amazing guide, though. Very clear.

[W1zzard]

look at where the tip of the pencil points? read the text below the image