Club 3d 7900 GTX
Default: 650/800
OC:690/839 (1-2mhz to the core or memory and its unstable)
Voltage: no mods
3dmark05: 10500
3dmark06: 6225
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Club 3d 7900 GTX
Default: 650/800
OC:690/839 (1-2mhz to the core or memory and its unstable)
Voltage: no mods
3dmark05: 10500
3dmark06: 6225
XFX 7900 GTX Extreme (690Mhz core)
Default: 690/1750
OC: 820/1880
Voltage: 1.7v to core, 2.34v to mem
940 is the most I can get from my memory regarless of voltage increase about 2.34v. mem on my 7800GTX 512 cards was MUCH better (~982Mhz).
-FCG
hi guys, so i have been playing around with my 7900 gtx EGS, and here is my OC'ed clock: 718/1788
i have the evga 7900 gtx EGS with stock clock 650/1600
http://show.imagehosting.us/show/128...-1_1280124.JPG
before i bought this card, i was indifferent between EGS and superclocked one. but i thought that the EGS one should be able OC to superclocked's stock clock. as what i predicted, both cards are the same, just with different clock speed "stock", my EGS is able to match superclocked's one, and i could hit even higher clock on stock cooling. here is the conclusion, it's not worth to spend extra 80 bucks on the superclocked one, because you can OC the EGS to the same level.
my card idle at 47 and 71 during heavy load (running on ati tool)
http://show.imagehosting.us/show/128...-1_1280130.JPG
hope my observation is valuable to those who are planning to get evga 7900 gtx and indifferent between getting EGS and superclocked.
the answer is DON'T SPEND THE EXTRA 80 ON SUPERCLOCKED ONE! SINCE THEY ARE THE SAME CARD. some people argued the superclocked one comes with better memory, and i am not sure about that. but as i have seen people's superclocked card's result. their OC'ed clocks are similar to mine on stock cooling and voltage.
Has anyone seen the new 7900gtx XXX? At newegg they have them listed stock as 700/1800!!! Thats awesome! Too bad they arent in stock.
But, keep in mind the XFX Extreme cards have no /almost no delta. So, the 700/900 timings are just that. Compare that to an EVGA SC with a 740 vertex core clock after the 50 MHz delta and at the same ROP/Shader clock of 702. The EVGA, even thoughat 690/880 is, in essence, clocked higher than the XFX XXX at 700/900.
Some will argue that no delta is OK since the ROP/Shader is still higher than the stock 650 core cards and does improve performance. The ROP/Shader bumps occur at 648, 675, 702 and 729. So, sotck cards are 700 vertex with 648 ROP/Shader while the XFX is 700 vertex ( or more if any delta exists - possibly 15 MHz?) and 702 ROP/Shader.
I run my card at 720 with a 60 delta, since the 729 seems to be the ROP/Shader limit. I found this limit when I removed the delta, which locks the clocks and these cores increment a clock at a time instead of the normal jumps.
So, with the edited BIOS, when I bench, my vertex core runs at 789 (729+60) and the ROP/Shader at 729 with the memory at 910. The no delta BIOS did not improve my OC and simply reduced performance.
the mem on these cards gets worse with volts and as a good 05 is dependent on the ram oc being higher than the core i am stuckQuote:
Originally Posted by freecableguy
best ram i can get is 900 but just to drive me nuts the core will oc to 950
at 1.7v
the question is can the mem on all 79gtx cards be oc to 1000 one way or the other
or is it down to luck of the draw weather your card has golden chips fitted
Me and baz got mixed results here - I love the fact his core clocks as high as it does.
My mem does clock higher but again 940 seems to be the general limit. Looser timings could help push that up I guess - but we still need a BIOS editior that will alllow this.
With Baz's core and my memory though - it would be the card we all expected to get.
The 7900TX - although performs well, is still a disappointment in my eyes.
Next time I will buy 8 series cards then wait for 9 series to come out.
I can't be having this - nvidia have clearly squeezed all they can from this generation - but I would have been happier waiitng til august for the G80 to be released.
This on the back of a launch of FX60's which in it's self was disappointing as the series reaches it's performance limits.
Thus far 2006 has been a disappointing year for new hardware and extreme overclcoking :(
Mav
Brand: MSI 7900GTX 512
Cooling: Stock
Overclock: 700/1020
Core/Mem Voltage: stock
Freecableguy what sort of watercooling are you running on your card, radiator size fans etc.. & have you a 7900 water block or just ordinary GPU block with ramsinks, very nice overclock any volt mods?
ooh nearly forgot also what bios are you running I have the same card
hiQuote:
Originally Posted by albertyin
did ya ram just oc upto that great speed
watercooling by dual Maze4 GPU blocks, rad is a PA160 with single 120mm fan (~110CFM although I think even this is overkill). ram is cooled by Vantec copper ramsinks with AS epoxy used and the same 120mm fan from the rad blowing over both cards. BIOS is the stock XFX bios x.x.x.12...nothing changed there.Quote:
Originally Posted by rapty
volts mods? yes... :)
vgpu at 1.7v, vmem at 2.34v
Nice setup, would you go for the 7900 block or a normal GPU block not includeing the ram sinks?Quote:
Originally Posted by freecableguy
With Volt modding any real world difference when gameing?
Thank you Cable :)
I found that I can BIOS flash up to 760Mhz GPU with 20 Delta - then I can overclock to 780Mhz in powerstrip, ram stays at 940.
Using the Leastek BIOS on a PV card.
Mav
XFX 7900 GTX
650/1600 Stock
680/1710 OC = 11480 3DM05
Hey guys, for those of you wondering, is it possible that the timings on most gtx's are far too tight? I mean, isnt 1.1ns ram rated to 900 AT LEAST? I have been hearing things that nvidia ram timings are tighter than samsung spec so its possible that the people getting 1000+ clocks have either a manufactuerer that used stock samsung specs or have modded the timings to samsung manufactuerer specs. I mean, my logic is also this, if so few of us have cards that can really be pushed past 900+ memory, then how can XFX offer a card with 1800 mhz memory stock? I would think the only way they could do that is by laxing timings to samsung spec right?
exactly what i suspected weeks ago. unfortunately there is no support from NiBiTor to change timings. I am waiting patiently for the next release after 2.8a.Quote:
Originally Posted by madgravity34
these are the timings i get from nibitorsQuote:
Originally Posted by freecableguy
http://net7.info/1/7900/timings/bfgtime.gif
and this is what it looks like in ntimings
http://net7.info/1/7900/timings/bfgtime0.gif
when you change the timings in ntimings the hex number top left changes
i think if you copy and past that new hex number into nibitors you can change the timings
ntiming also says it can copy to the card but as yet i have not tryed
ntimings linky
http://www.mvktech.net/component/opt...older/cat,119/
timings cant be changed on the 7900gtx using the latest nibitor release. needs to be updated for 7900gtx full compatability.
@FCG
So then all we can do is try and get ahold of a bios like the XFX XXX or some other card that hits some above average memory clocks right? Do you know which ones we should be on the look-out for?
Update:
Now running my XFX @ 685 / 1750
It appears to be *stable* - but I am seeing some major lockups in multiple games. It locks up for a minute (or two) and then comes right back and continues on with the game.
Also, I fired up Doom 3 to see how the 512MB RAM would help. I am at 1280x1024 with all of the effects turned on and the AF set to 4X. I tried running it at 8x and 16x, but the card couldn't handle it. I guess I am disappointed with that as I thought I'd be able to max everything out and maintain great FPS. Does it sound like I have something not running quite right?
ya that doesnt sound right.... i ran doom 3 on my old 6800gt with some AA/AF just fine and high textures...
Where can I learn about this whole delta thing and how it relates to the 7900gtx? I have a BFG 7900GTX...any info on what delta it has?
Regards
http://www.xtremesystems.org/forums/...ad.php?t=72638
read this little gold mine
Looks like if we get the XXX XFX BIOS we might be onto to something that will allow us to clock the RAM further.
Not seen it anywhere yet though.
Feel free to drop a copy in here.
Cheers
Mav