woah...is that voltmodded at all?
or just very well cooled?
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woah...is that voltmodded at all?
or just very well cooled?
Gotta be vmodded or chilled....570 before delta would be a first on regular water.
for a 7800gt, 510 before delta without vmod would be amazing
It's a VGPU and VMEM modded LeadTek 7800GT (not Extreme edition). Cooling is a custom water setup, MEM cooling only by air for now, GPU is watercooled.
I'll attach a few pics so you will get an idea of how I cooled it - the Reserator 1 is cooling the CPU (A64 3000+ @ 2,5Ghz) and the other custom watercooling is cooling the chipset and GPU and using that other ugly looking radiator (but it workx very well, I will add another radiator in series and add 2 12cm fans@5V@18dB...)
john
wow nice radiator!
looks like a tidy mod as well, so very nice. I'm vaguely thinking about vmodding the card, but i've not got round to it yet (i need to become proficient at soldering first!)
I have attached a pic of the mod.. not too tidy but alas, it's working very well :) The card and chipset were stock cooled at the time I took the pic..Quote:
Originally Posted by don_vercetti
From what I can tell, my BFG GT Card is running with a Zero Delta, and no way of changing it in the BIOS. Does anyone know of a link to a Custom BIOS with a delta setting, as well as all the RAM timings, fan options, etc etc...
Thanks a lot!
Kenny
I run 513 before delta 24/7. I notice tiny artifacts in rthdribl (none wile gaming or using 3d mark) that look like specs about the size of a ( . ) at 530 before delta. Memory seems to do fine at 1400 but stay at 1350 to be safe as the memory does get pretty damb hot all by its self, despite OCZ ram sinks.Quote:
for a 7800gt, 510 before delta without vmod would be amazing
There was a 7800 GT OCrev 2 BIOS earlier in the thread. Has the fan a 100% in 3D, a 45 Mhz delta (works best on GT's), and standard memory timings. I can mod a BIOS with better timings, but I need to really get a 7800 GT for testing. Hate to send unproven BIOS files into the wild.Quote:
Originally Posted by K404
Here is the link to the Rev 2 GT OC BIOS.
http://www.xtremesystems.org/forums/...8&postcount=29
If you run 500, you will see almost the same performance as 513. 500(540) is a key vertex point, and the ROP/Shader cores kick up to 513 from 486 at 500 root. 513 nets you 553 on the vertex, which does little for performance versus 500 (540). The next step with a 40 delta is 527. So, I would run 500/1350 24 x 7 instead of the 513. That's where I run mine. A nice sweet spot for gaming use.Quote:
Originally Posted by rodman
i'm getting the eVga 7800GT CO 470/1100 stock. after reading the thread a couple of times it seems the main thing is that the jump levels are 13.5mhz. so after going and adding 13.5mhz from the reference 400mhz core speed the first jump level i would see with mine is 481mhz right? or do i have this wrong? do i go from the 470mhz core clock that the card comes from hence making my next jump level 484mhz?
until i get some water on this gpu i was going to just go for 485/1200 for 24/7 use if temps allow and i get no artifacts in bench testing and gaming. but when i get the water i'd like to have this info correct for when i want to go further.
Thanks Heavy! :) Will try that this evening :)
I`m now running with a 45 Delta, but I`m not sure if I see much of an improvement. I cant clock my core as high (the number seen with Coolbits or Riva) but the vertex ROP clocks are up a bit.
If I have ROP and Shader jumps at 500 and 514 core speed, are the speeds between 500 and 513 pretty pointless as an OC because the ROP and Shader clocks dont change then?
Back when I had the Zero Delta, I could hit a higher core speed, and the ROP and Shader wouold scale at the same rate, but be lower than with the Delta Does it not all balance out?
Sorry for the noob questions..i`m still kinda confused by this :)
Kenny
Well lets just say your rop/shadder cores max at 500Mhz but your main core wants to go higher to 540.. Well with a 40 delta the core will run at 540.
So is it like a divider, but instead of using percentages, its using normal scaling and multiples of 27?
Heh...if this gets broken down into simple enough words, I`ll understand eventually! :)
Kenny
Well it may help to run RivaTuner v2.0 Release Canadidate 15.7 and use the hardware monitor that shows all the clocks for the card. You can find that under the Main tab,customize then hardware monitor.
Use a program called ATiTool 0.25 Beta 8 and hit show 3d view so it will kick in the 3d clocks and you will see in hardware monitor what the clocks are.. Then just mess around with the Ati Tool to change the clocks and you will finally understand whats going on. But i've found that Ati Tool is buggy with the clocks.. so just use it for a reference and find something else to finallize the overclock with.. or maybe just flash the card bios with the clocks.
Lower clocks with a delta are better than higher clocks without. I have done testing to confirm this. Run some 3Dmark05 runs to see how the card performs before and after.Quote:
Originally Posted by K404
Well i'm havin a prob getting the card to live with the Rop/shadder clocked at 621Mhz. Seems i'm getting artifacts in the turtle/butterfly bench in 3dmark 03.. At first i was hoping it was just the core clock of 650 that was doing it but it was'nt. I have to drop the rop/shader down to the level below of 594 to get a artifact free bench. Totally sucks. I've tried givin her way more voltage of 1.65 and that did nothing so i dropped it back down to 1.62v.
I'm really hopin this has something to do with tweakin the memory timings as you shown earlier in this thread.. To be honest i dont remember the artifacts before.
As it looks the only way to clock the rop/shader higher then 594 and lower then 621 is to remove the geo clock which will suck on its own down clocking the main core that much from 650. But i'm losin lots of performance now. I was just knockin on 15,000 in 3dmark 05! My last bench was 14950!
Are you using the custom BIOS I made? If so, it has the geo at 50, which would mean your root clock would be 600, which would keep the ROP/Shader at 594 and the core at 650 (648 was optimal). Did you do a VMod on the memory? Or, just the core? ROP/Shader uses the memory more than the vertex core. With a 40 delta, you would need to clock to 610 to get 650 on the vertex, and it would bring up the ROP/Shader to 621 since you exceeded 607. If you keep the root clock below 607, you may get what you need. And, 606+50 is 656. Maybe the 50 delta BIOS will help you get that last little bit.
No the custom i made from the original.. Has no throttle and only 3d and 2d. Clocks at 608+40 and 720=1480. 2d is normal with 1480 mem.
I've flashed atleast 10 times yesterday with different geo clocks.
Ok so i really was hopin it was the mem timings.. with them back at default no dice! Then i tried upping the voltage on the mem from 2.32 to 2.4v and it just got hotter and more artifacts.. Tried lowering the voltage and same as before. I even down clocked the ram to 1400 from 1480 and the same.. Crap!
I even grabbed a very large house fan and set it to blow right into the case right on the cards and it cooled the ram to were they were cold and there still was artifacts at 621 rop/shader. :(
So the only thing that fixes it is just clocking the card at 594 so the rop/shader stays there. 621 is i guess the wall for one of these 2 cards :(
So i guess the only thing i can do atm is just slap 50 or 60 geo with it at 594 and run with it.
But man is there an increase havin the rop/shader at 621!
Oh that or i could just take away the geo all together and just clock the card at 608 and the rop/shader stays put at the same.. but theres a loss doing that as well.
Heres a good way to go about it, edit a bios and set the geo delta to 80 and overclock your card till you see artifacts, use riva tuner to find out what that max geo delta was and write it down. Next edit another bios with a 0 geo delta and oc again to find out what your max is for the rop and shader. from there your gonna have to decide what geo delta will make it hit both of those max's at the same time.
I'm confused.. whats all this about like 3 different core clocks? How do I change them? I'm using rivatuner. And whats this delta thing? The highest I could get without my card not passing the test was 487. And teh memoery only goes to 1157 without getting lines during 3dmark. Anything above 1200 and the lines apear in 2D stuff and my system crashes. I have the BFG 7800GT OC.
There are actually almost 4 clocks for the core. One is the clocl you set it to, one is the geo metric delta clock, and hte other 2 are the rop and shader domain. So lets say you go into riva tuner and set your core to 450. You also have to factor in the geo metric delta clock which is set in the bios. Most are set at 40. So if you clockl your core to 450 then your geometric delta domain would be 490(450+40) For some reason my shader and rop dont match up with the core clock and im still trying figure out how to do that.
For me, I figured out that my max geo is 491 while my max shader and rop is 480. So I set my delta to 16(odd but you have to add 5 to it with these 7800gt's) which should give me my max on both but it dont. My rop and shader on jumps in spurts. So i set my clock to 475 which gives me my max delta of 491 but my rop and shader go to 486 but shouldnt it be 480? So i still cant figure out all this either. All I know is my 3dmarks keep rising the closer I get all the clocks to there max.
Has anyone completed this chart for a 7800GT to account for the different architecture? Is it definitely GTX chart +5 Mhz?Quote:
Originally Posted by HeavyH20
I fed my card 1.51V last night and it got me to the key OC point of 473. As you can see in my 3DMark score, the 40 Mhz delta in place. I'm just wondering if 473 or 486 are really key OC points for the 7800GT. If the next real key OC point for the GT is close, I'd like to shoot for it.
http://service.futuremark.com/compare?3dm05=1356229