Please post 7900GT / GTX overclock results

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05-20-2006, 07:25 AM
Zeus

Thanks Andy. ;)
I've been exploring some new grounds today, 41K was on the cards but took my poor Opty 146 to run at 3.2GHz, for now i'm satisfied.

41K >> http://service.futuremark.com/compare?2k1=8977633
05-20-2006, 07:43 AM
5days

Quote:

Originally Posted by jVIDIA

5Days, do you have any vmod on the card ?

Yes. A 1.55V GPU mod.

But the thing is it only gets boiling hot once I push the core beyond 700MHz or the RAM beyond 840MHz.

The core did 630+MHz on stock volts and cooling (now under water) so I am thinking that these bastards are overheating and limiting my overclock.

I just found a nice mod on how to cool them though (funnily enough, it involves no modding :p). http://img132.imageshack.us/img132/8882/img04552eh.jpg

So lets see how this goes!! :D
05-20-2006, 09:55 AM
wtkprol

http://img99.imageshack.us/img99/747...mark7gm.th.png

I need a better CPU to hit higher scores though. All on air.
05-20-2006, 10:00 AM
Zeus

Quote:

Originally Posted by Willis

did you only do the 1.4V mod or did you also removed ovp resistors?

No need to remove any resistors, just a wire soldered between ground and the known +0.2V spot.

http://img.photobucket.com/albums/v6...s/IMG_1917.jpg
05-20-2006, 05:02 PM
5days

Quote:

Originally Posted by Willis

those are the ic's that it's(fan) cooling?
do you get any blank screen (black) or something like that?

Yes its cooling the IC's.

Yes I do get blank screens etc.

Quote:

Originally Posted by Willis

I just removed al my mods :)
It seems that this Gt doesn't like 1.55V or anything above 1.4V..

I had blanking screen probs at those voltage, according to coolingbug when having artifacts in 3dmark03 my card was ready for rma nothing i could do about it..
so i removed the mods and cleaned the pcb, lol gues what 3dmark03 runs like a charm again :stick:
while at 1.55v and default core mem it would freak out :stick:

I guess I'll have to get the acetone out and make it 1.40V if this doesnt work.
05-20-2006, 08:33 PM
revenant

Ohhhhhhkay. I finally got around to vmodding my cards.. whew. I wanted to make sure they were fit before doing so... went for the fairly conservative and oh-so popular 1.4 vgpu mod..

http://venus.walagata.com/w/agunn/Vmod2.JPG

The bottom card went smooth, but the top one, the damn ink kept drying up on me, so it doesn't look as nice, but it appears to have worked fine. I like the quick release tape tabs also. :D I also sinked my memory, MOSFET(s) and the memory controller IC chips while I was at it..

as for the results, so far so good.. The core temps went up about 4c or 5c each, not too bad. they idle at about 36c and 37c now.. Coolbits was :banana::banana::banana::banana: for OCing with this vmod, it would fail the "test" if I even moved 1mhz higher, so I decided to try powerstip. That worked! I was able to get good solid runs at 635mhz on the cores.. 650 would lock on deep freeze. DOH! Oh well.. I'm going to play some Oblivion now and test 635 thoroughly.. I have my memory at 1700 (850*2) also..
05-20-2006, 10:02 PM
DStealth

Quote:

Originally Posted by Zeus

Got a new XFX 7900GT extreme edtion to replace my broken one. :banana:
Did the 1.4V mod right away and running stable at 700MHz core!!

The mem isn't 100% stable at 900MHz but i hope some burn in will make it stable at 900MHz.

Wow you have fantastic core m8, 700mhz @ only 1.4v ATItool stable.Wow again.I can hit 666 @ 1.4v Atitool free and 700mhz 3dmark benchable, @ 1.5v 680mhz stable and 720mhz benchable.You GPU is great, i wish i have yours:rolleyes:
05-20-2006, 11:54 PM
Zeus

Quote:

Originally Posted by DStealth

Wow you have fantastic core m8, 700mhz @ only 1.4v ATItool stable.Wow again.I can hit 666 @ 1.4v Atitool free and 700mhz 3dmark benchable, @ 1.5v 680mhz stable and 720mhz benchable.You GPU is great, i wish i have yours:rolleyes:

Yeah, i sure have.
Too bad the mem isn't that good but some burning in with ATI tool and RTHDRIBL already gained me some 10MHz.

I tried the pencil trick for the mem and went from 608Ohm down to 575Ohm, so voltage went up from 2.02V to 2.09V but mem overclock decreased instead. (~860MHz)

Cleaned the resistor and now i'm back at 893-895MHz for the mem.
I hope some more burn in will make 900 fully stable.
05-21-2006, 08:30 AM
Shark-357

My new toy Ausu 7900GT@1.55V/2.2V
Dont mind the low clocks on GPU coz i was only testing how far can i push th memory:banana:

http://img167.imageshack.us/img167/6...1000mhz8wf.jpg

http://img362.imageshack.us/img362/5...1030mhz7kt.jpg
05-21-2006, 11:17 AM
Shark-357

Thx m8:D

Anyway heres some SLI playin

this is how i modded the card as i have only one waterblock

http://img296.imageshack.us/img296/1...ture0016fo.jpg

This box cooler pwns any VF900cu as the card modded to 1.55V doesnt go over 58°C when on load :toast:

shot of the system

http://img296.imageshack.us/img296/3...ture0311al.jpg

this is a really quick 05 run no tweaks what so ever

http://img56.imageshack.us/img56/488...i7009008iq.jpg
05-21-2006, 06:59 PM
DeToNaToR.cl

Asus EN7900GT 450/1320 @ 720/1750mhz :( "Air"

http://service.futuremark.com/compare?2k3=4797883

http://img389.imageshack.us/img389/416/235759rk.th.jpg

With this settings I play games, tomorow i will try higher clocks for the CPU and the card and some tweaks.
05-21-2006, 08:08 PM
DoubleE

I have a Gainward 7800GS+ which in effect is a 7900gt for agp.
Is the 1.4V mod described by Zeus applicable or is there another way....?

I want to breach that 10k 3d5 barrier... it's nagging me....:)
05-22-2006, 01:14 AM
Zyprex^^

Nice work Shark-357! I did really like your mod :D
I' thinking of doing the same mod with my card, with my Athlon X2 boxed-cooler.

Can you descripe detailed what you did?
05-22-2006, 02:20 AM
Shark-357

Thx m8:)

Well mod is preaty easy .
Strip the card and the cooler, then line up cooler and the card mark mounting holes with an alcohol pen and just drill the holes in the box cooler .
U will also have to saw off two edges that prevent u to install two ram sinks as u can see from the picture .
For mounting is best to use the same springs as for water blocks.
05-22-2006, 11:41 AM
M3kk

MSI

1.4v GPU
2.18v MEM
http://mekk.homeip.net/3DMark2003_MS...1030-23991.gif
http://mekk.homeip.net/7900mod/Image065.jpg
http://mekk.homeip.net/7900mod/Image068.jpg
http://mekk.homeip.net/7900mod/Image069.jpg
05-22-2006, 01:45 PM
althes

nice
05-22-2006, 02:30 PM
Marvin_The_Martian

Update

Vmod 1.57v
http://www.linkforcecorner.com/forum...23de60bc28.jpg
http://www.linkforcecorner.com/forum...23e6846193.jpg
http://www.linkforcecorner.com/forum...23da5bc3c9.jpg

http://service.futuremark.com/compare?3dm06=310069 5318
http://service.futuremark.com/compare?3dm05=2030108 10613

Venice 2.7 1.62v
asrock dual sata2 vmod htt270
xms3200xl 225 2-3-3-6 166div
asus en7900gt top vpgu 1.57v 670/1720
05-24-2006, 12:20 AM
kakaroto

Almost 38K in 3dmark03 ;)

http://service.futuremark.com/compare?2k3=4797502 (37.6K)

http://service.futuremark.com/compare?3dm05=2029074 (14.9K)

http://service.futuremark.com/compare?3dm06=306385 (7.6K ~ 4300 SM3.0 :) )

710/1700MHz SLI XFX 7900GT XT
05-24-2006, 01:33 AM
C-BuZz

2 Attachment(s)

1.5vcore / 769Mhz
1.6vcore / 797Mhz

Should be pushing 840/850Mhz with 1.7/1.8vcore.

Havent done vmem mod yet.

C-BuZz
05-24-2006, 01:56 AM
Highland3r

New card arrived, XFX 7900GT 520M and so far its managed 620mhz core stock cooled/volts and 850 mem. Seems happy enough looping 3d mark 2003 at these speeds so far....
SLI action to come!
05-24-2006, 06:06 PM
andre X_X

VENICE 3000+ @ 2.8ghz did this......
http://service.futuremark.com/compare?3dm05=2029766

http://img504.imageshack.us/img504/4...05116364dz.jpg
05-24-2006, 06:09 PM
andre X_X

the memory run like a beast (950mhz) with no VGPU Mod, after the Vgpu mod, its hard to run it like it was.... like i need to mod it too...:D:D
one more thing, the 1.55v on Gpu help the mem to oc better at coolbits autodetect. before Vgpu mod it stuck at 784mhz, after gpu mod at 800. still cant reach 950+...
05-25-2006, 12:45 AM
Zeus

So you mean after the VGU mod, mem overclock went down but coolbits auto detect freqency for the mem went up?

How did the mem clock with 1.4Vgpu?
05-25-2006, 02:56 AM
andre X_X

yup, thats what happen...
1.4,1.45,and 1.5v correspond the same with default Voltage, 784mhz on coolbits... only 1.55v run the mem to 800 on coolbits...
05-25-2006, 02:34 PM
Marvin_The_Martian

http://service.futuremark.com/compare?3dm06=314976 5500

venice 2.7 7900gt 1.57v 710/1900

Edit: much room to spare I think, cf700cu with these volts isn't enough on it's own, have 2x80mm fan helping now and temps dropped to 52c 10 min ati tool artifact scanner :banana:

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