9800Pro vmem - mine is 2.7V stock ?

[GreenBeret]

I thought that 9800Pro mem is supposed to be 2.9V stock. My HIS 9800Pro (with Samsung mem like all others) is 2.7V stock for some reason. My multimeter is new and it gives correct reading on all other things so it shouldn't be a problem. I'm running 2.9V now and she does 390 no artifacts. How high should I go ? :)

[Deathangel]

Mine was 2.9 stock but I have my 9800 pro at 3.35 volts with no problem so I think you are pretty safe for a bit. I think around 3.1 would be considered safe but thats your call. Take it as high as it'll go with no artifacts, that's where it pays off for your work ;)

[bachus_anonym]

my Sapphire R9800P (R9700P OEM black PCB layout) had stock 3.35v !!! it has 2.86ns Samsung memory... i'had been running it like that for almost 6 months up until it's unfortunate death in course of vmodding :mad: this week... so i guess at least 3.35v is good to go... at 3.7v i had totally corrupted screen in windows... memory chips were just warm to the touch and definetely not hot...

[Deathangel]

3.7 :slobber: brave brave man hehehe Sry to hear about that 9800, thats an expensive paperweight. Wanna depart with it ?

[bachus_anonym]

well, the 3.7v was little accidental...
i mistaken vddr checkpoint with vddq :brick: and raised voltage still thinking that sth was wrong with the mod coz "my" checkpioint read 2.8v :am:
and it died from unknown to me reasons...

[Hell-Fire]

Actually, 2.7v is stock specs for ATi on the Vddr. Some cards are lower and some are higher, but I believe that they list the specs at 2.7v.

You can run em at around 3.1v without sinks, and around 3.4 with sinks. BUT, you need some air circulation around them and I wouldnt run 3.4v unless benching.

[asw7576]

I don't know if this is only my card or normal situation for all 9800pro cards.

Under stress in 3dmark or 3d game, the memory surface produce intense heat. The heat intensity is up and down depending which test in 3dmark.

I added heatsink on them.... I'm worried the intense heat will melt the solder pad underneath BGA ram.

I haven't volt mod memory, and I'm truly eager to mod one. Right now the default vmem is 2.72V and what is the safest limit on vmem mod? Some says 2.85V is considered safe limit. It's expensive stuff you know....

Currently my card is doing 438/371 without volt mod.

[Arkangyl]

Yea, my 9800 Pro's mem (Samsung 3.3ns) gets pretty damn warm in 3DMark, then again I'm sure warm to my hand isn't damngerously hot, I really need a temp probe on it...

oh, 390mhz with no ramsinks and no vmods (yet!!!)... I use 380 to be safe (cept during benches)

[Stang_Man]

Originally posted by asw7576
I added heatsink on them.... I'm worried the intense heat will melt the solder pad underneath BGA ram.

lol, dont worry :p:

[joni]

Originally posted by Hell-Fire
Actually, 2.7v is stock specs for ATi on the Vddr. Some cards are lower and some are higher, but I believe that they list the specs at 2.7v.

You can run em at around 3.1v without sinks, and around 3.4 with sinks. BUT, you need some air circulation around them and I wouldnt run 3.4v unless benching.


I have small heatsinks, this means i can safely put 3.0v?...well i haven't made the mod yet but i'm thinking on do it !!!

If i put 3.0v on mem. is it safe to raise the clock untill i have artifacts? even knowing that the increase speed will generate heat!



PS: sorry for my english, i'm from portugal (as you can see)

[Ragnarok]

my dog §§§§ card before cant even do 360 mem (vmem stock is 2.9)

but now after like a few month it can do 380 stock pass 3dmark now? wtf?!

[asw7576]

Even with heatsink on the memory, I don't suggest 3.0V vmem. I think you should be happy with 2.9V vmem.

If you insist 3.0V then ................... it's up to you, but I won't do it if you asked me personally.

[Hell-Fire]

Originally posted by joni
I have small heatsinks, this means i can safely put 3.0v?...well i haven't made the mod yet but i'm thinking on do it !!!

If i put 3.0v on mem. is it safe to raise the clock untill i have artifacts? even knowing that the increase speed will generate heat!



PS: sorry for my english, i'm from portugal (as you can see)

Alot of people are going well over 3v without issues. Its always a chance to go over stock with voltage, but not likely will have a single issue at 3v. That doesnt mean throw 3.25v into ram that doenst have sinks or them and no air flow. If you plan on high voltage, plan on good cooling.

http://www.fastlanehw.com/reviews.php?action=view&revid=74&page=1

Says it all.

I have been busy modding alot of hardware lately, so although I have modded my 9800Pro, I havent even had the time to mess iwith it. I can assure you that I will be breaching 3v. :banana:

[joni]

Hell-Fire thanks for that link ;)


I have my t-bred 2400+ stock cooler on the GPU and the heatsinks in the mem's.
I'm not an ambitious guy, i just want 500 on the gpu and 400 in mem's, do you think i can get it?

[Hell-Fire]

Anything is possible, but I would say getting there wihtout a little bump in voltage is unlikely to be artefact free or stable.

However, all cards are different as far as their limit in overclocking before a mod is performed. All can you do is give her a rip and see what happens. You may find that after a bit of use she starts to overclock better.

Your cooling if plenty up to the task as long as you are getting good contact on the core.

Some people seem to get better clocks when moving to a different bios for the Radeon.

[joni]

That's why i'm going to make the vmod's :)
i only fear that the mem's get to hot and die!

[asw7576]

Originally posted by joni
Hell-Fire thanks for that link ;)


I have my t-bred 2400+ stock cooler on the GPU and the heatsinks in the mem's.
I'm not an ambitious guy, i just want 500 on the gpu and 400 in mem's, do you think i can get it?

what?? 500/400 is not ambitious goal?? :rolleyes: :rolleyes:

you'd be lucky if this thing goes 450/375 without arttifacts.

[joni]

I´ve already had it running at 465 and 380 and the only thing i notest was some white little spots in the shadows, in the test nature 3dmark03, without vmods :)

That's why i think 500/400, is possible to get with vmods :rolleyes:

[Asio]

It is trust me :)
And I'm talking aircooling here, not watercooling ...

[joni]

Have you tryed? how much did you get? :)

[asw7576]

hey, I'm using 3V VMEM and it's okay....... hmmm.... I thought 3V is too much.

Anyway, the memory OC remain the same ( 371 mhz ). :confused: :confused:

[dexx]

Hey GB how high did you end up going?
My 9800pro with Hynix mem shows 2.7V. I'd be interested in what resistor is needed for 2.9-3V. The Hynix definitely gets warmer than the Samsung Ive had before.

[andyddr]

Got cheap Gexcube 9800PRO upto 500core (1.95v) and 420mem (2.98v) on aircooling. BTW what`s a safe limit for core on air?

2003 score (http://service.futuremark.com/compare?2k3=2204588)

[Hell-Fire]

I certainly wouldnt run 1.95Vgpu with the stock air cooling thats for sure.

Even with adding a modified cpu cooler on there, thats a pretty high Vgpu to say the least.

It has been suggested not to run over 2v for any length of time when using pelted blocks or something along the lines of a VapoChill.

I know that Stang_Man has run as high as 2.1Vgpu I think, but that was for a loop or 2 of 3DMark to get a max score, not anything that can be run 24/7 without considerably lowering the life expectancy of the card.

3V on the mem is fine if you have sinks on them, and sometimes even without sinks if the ram runs cool period, and good air flow around the card.

[aLpHaEv7]

mine default ram volts are also 2.7v, which maybe explains why it only clocks to 365MHz now. time for some vmod :)