EmineM check previous pages for macci's vmem
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EmineM check previous pages for macci's vmem
I was reading voltages yesterday to understand how the card works with different charge on it...
For example, with the gpu mod of i get around 1,8v when i turn it on i get 1,920 (i got the pot regulated to this voltage).
Now when i make apply to the oc on the card (using rage3d) the voltages went up to more or less 1,90v...(before click apply i get 1,920)
When i start benching voltages went above 2v too (oscilation seems to be normal in r360).
I realize that if i change the value of the pot i use in the r1596mod (20k was the first value i tried) for instance to 15k the voltage that i see in the multimeter when i turn the mod on before do oc in the card went from 1,920 to 1,930...
Wich is the value that works better for pot?
Depends on the oc????
I'm having problems on running the card at the speeds i used to run probably because the raise of the ambient temperature...
Change the thermal paste that was in the block same :banana: :banana: :banana: :banana:...
Give more volts same :banana: :banana: :banana: :banana:...
3dmark could freeze or give me a blue screen...reset i only get once and i get once into windows to (i click benchmark 2 seconds later back on windows, this situation only happened to me once).
What i think weird is that 3dmark never lock's up in the same place...
I didn't tried to cool down the hexfets, there is any proved gains with that???
Other thing...i was running drago low and i forget to turn on the vmem mod and i run it with no problem at 434mhz, for what i see the vmem is a mod not very important (just for in my particular case cuzz i'm not using phase cooling...normal h2o)
Any other mod that i could try m8's?
Thks dude's ;)
Cooling the mosfets does help. They put out more amps when cool. Put a heatsink on the inductor as well. The heat from the mosfets and inductors can and does increase the temp of the core as well. So active cooling on both is needed.
OK on my herc r9800xt which is still completely stock btw i'm starting to hear that whining sound. Haven't had any time to play with v mods lately. Maybe this weekend, i hope.
CATCH22ATPLAY Now you gott what i was talking about. Anyway I just make music louder and hear nothing from my machine. :)
99.9% of the time you hear whining in switching circuits is from inductors, Ferrite beads on leads, transformers, and bad connections. Hopefully it is one of the first three problems and not the last one mentioned.
I would check to make sure the magnet on top of the inductors is securely fastened to the top of the coils.
Remember you are increasing current demands, which means the Switch mode power supply on the card is going to reduce Pulse frequency and increase the width of those pulses, thus making the inherent whine of switch mode power supplies more audible and more likely to make coils vibrate.
I really havent looked at my card thorughly yet, and dont know if there is a transformer... Probably is but I dont konw. If this is making the noise, just ignore it because you'dd have to unwind all the windings and rewind them tighter with a fill material in the coils to get rid of the whine.
I really would not worry to much about it, unless it sounds very loud and has a metalic buzzing, which usually indicates a bad connection (Usually at the connection of the inductor that was making noise in the first place)
Buzzing, whistling, whining, etc is perfectly normal in switching circuits. Your TV, CRT, Power Supply, car audio amplifers all emit the whistling, whining associated with switched DC and you aint worryin' about them now are ya?? Usually it can be fixed with glue, but DONT USE SUPER GLUE OR LOCTITE, it eats through/ weakens many materials, and a noisy inductor is better than a shorted one.
That's very interesting! What's your card O/C'd to: ??? :)Quote:
Originally posted by SPL15
99.9% of the time you hear whining in switching circuits is from inductors, Ferrite beads on leads, transformers, and bad connections. Hopefully it is one of the first three problems and not the last one mentioned.
I would check to make sure the magnet on top of the inductors is securely fastened to the top of the coils.
Remember you are increasing current demands, which means the Switch mode power supply on the card is going to reduce Pulse frequency and increase the width of those pulses, thus making the inherent whine of switch mode power supplies more audible and more likely to make coils vibrate.
I really havent looked at my card thorughly yet, and dont know if there is a transformer... Probably is but I dont konw. If this is making the noise, just ignore it because you'dd have to unwind all the windings and rewind them tighter with a fill material in the coils to get rid of the whine.
I really would not worry to much about it, unless it sounds very loud and has a metalic buzzing, which usually indicates a bad connection (Usually at the connection of the inductor that was making noise in the first place)
Buzzing, whistling, whining, etc is perfectly normal in switching circuits. Your TV, CRT, Power Supply, car audio amplifers all emit the whistling, whining associated with switched DC and you aint worryin' about them now are ya?? Usually it can be fixed with glue, but DONT USE SUPER GLUE OR LOCTITE, it eats through/ weakens many materials, and a noisy inductor is better than a shorted one.
nothing too extreme at the moment. I'm still designing my phase change system and use a intel P4 extreme edition Heatsink fan combo to cool it.
490 GPU, 420 Memory, and this is 100% artifact free in any situation, any game, etc.
Havent done any Vmods at the moment, I have added caps and what not to the voltage rails and other performance enhancing stuff to mainly stabilize voltage and clean up the voltage rails as much as possible.
My PSU is one mean mother though. I've done extensive work on it and it could no longer really be considered modified, but more like redesigned/engineered. This has helped me the most for overclocking everything in general and has made my computer run 100% stable in situations it used to lock during.
boosting voltage has limited value when the added voltage has lots of noise and ripple to it. eliminating the noise from the voltage rails is key to any digital circuit wether basic TTL or GHz frequency CMOS.
Got another 9800XT.
540/860 artifact free on water. only GPU and vdd mods. No r1596, vddq and vref.
wow 540? what temp does the overdrive utility say your GPU runs?
If I can get 540 with water, i'll say screw the phase change on my GPU.
what Vollts are you running?
temp is 53*C
No artifacts.
about 2.05 volts.
It's funking fantastic.
That core speed with no artifacts it's very good...what kind of cooling are u using 2pizza???
I have here an old amd copper cooler...maybe i will cut it and put it on the inductor and on the mosfets too...who knows....maybe improve something...
Regards
Vortan
Vortan: You wont see any benefits what so ever by heatsinking the inductors. You maybe will increase long long far in the future reliability, but unless you are feeling searing hot temps on them, it wont do anything but look pretty. Mosfets I can see doing though, But again, unless they are running hot enough to quickly burn your finger it wont amount to much besides peace of mind (Which is arguably very important). True, Rds(on) spec decreases as temp is lower, I dont think the card draws enough current to make a massive difference, and i'm almost certain the cooling from a glued on heat sink wont amount to any benefit performance wise.. I could be wrong though, I'd like to find out.
However.... Putting something magnetic on top of an inductor will change the inductors' characteristics. better? worse? I dont know, i just thought of it from your post. If there is a lot of current through those inductors (Which there is) adding something magnetic could drastically reduce it's filtering effect, but if the magentic mass is high enough, it could increase the inductors inductance giving better filtering (But with some trade offs)...
2Pizza: Your temps are 53 C?? is this after a bench mark? or sitting idle? I ask because mine only reaches 45C after running Aqua3 and 49C after 3dmark03. You must have a hellacious OCer for no artifacts at that temp. I know mine sure isn't, but then again you did Vmods and have much better cooling.
Whatever the case, I'm still impressed by your clocks. I'm getting more and more tempted to do the Vmods, but I already lost a few 9800 Pro's from too much pushing, and dont want to lose my XT... yet:D
Edit:
I looked at fairchilds reference schematic and they way those inductors are configured they could be enhanced by rewinding.... If your really into clean, noise free voltage rails, you could gain some serious points here. If I remember right, those inductors use about 20-22 guage magnet wire. I bet your cold wrap a few more turns on those cores to increase inductance OR, get new cores all together. This is the route i'm gonna go. Thanks for the info guys.
53*C just after the bench. 50*C idle. Watercooling is crappy Aucma Cool River. I'm realy impressed by this card.
Any1 knows the place where to read the vgpu on the asus 9800xt?
FRONT PIC
BACK PIC
this card does 465/405 easy, i can still oc it more but the performance drops, so im thinking of doing the vmod on the gpu.
im waiting on 1 of the new prommies ST to really cool it down :D
but i need to find the vgpu reading spot or ill be stuck....
:confused:
http://vmodz.by.ru
Look at the pictures. I think you'll get it without comments.
TY m8 !!!
i owe u big time :D
Buaaahhhhhh !!
Killed the asus 9800xt trying to do the vgou mod :(
Everything was perfect, pot at 10kohm, switch it on.... vgpu was giving 1,85.... looked to the monitor.... after like 5 secs blank screen :(....
Really dont know what happened :bsod: :bsod: :bsod:
Blaster My regrets.
Tell me what did you mean by that: "TY m8 !!! i owe u big time"?
I'm not used to spoken english. :)
m8 means "mate"
That's all I understood. :)
ty = Thank you :)
m8 = mate
i was just saying that u helped alot and if i could i would return the favour :)
...
I got another 9800xt coming, this time is a Club3d.
Im not sure ill vmod it, Im afraid killing this 1 too :(
guess im stuck :confused:
Blaster Gotcha, dude! :)
I was runnig 9800XT GPU @ 2.3. It's still fine. You just should learn to solder so that you can unsolder mods later to rma the card.
I got that gcard through a way i cant RMA it (lot cheaper thought)
It was really a bad week... 9800xt died, probs with the AN50R, etc... :( :(
Im frustrated.... :help:
Blaster Didn't get ya. What are the problems with rma?
I guess the bought of that 9800xt was sorth of a oem card that he get much more cheaper, that's why he can't make the rma...Quote:
Blaster Didn't get ya. What are the problems with rma?
Perhaps directly to the manufacter i dunno but without anything that proves the bought of the vga is difficult i guess...
Regards
Vortan
Got a new Club3d 9800xt that overclocks to 492/425 with air cooling :D (no vmods yet)
... although i dont bench at that speed cause it starts throtling
... still waiting on a new prommy st to cool that beauty ;)
Quote:
Originally posted by Blaster
Got a new Club3d 9800xt that overclocks to 492/425 with air cooling :D (no vmods yet)
... although i dont bench at that speed cause it starts throtling
... still waiting on a new prommy st to cool that beauty ;)
Now that's what I call a quality card!!!!:toast: Do you mean it runs at those speeds with tons of speckles,etc... Or is there a quality picture still at those speeds?
What air cooling are you using? Stock or a CPU heatsink? I just redid my heatsink by adding a 1/4" thick copper heat spreader plate to the bottom of a crappy stock Intel P4 HSF. Used arctic silver ceramique and it works quite well. Noticed 4 degrees drop Celsuis (40C down to 36C idle temps).
I'm getting more and more tempted to do the Vmods, but I really can't afford to lose this card yet...
how reliable are the 9800XT mods? I know they work performance wise, but how many of you have burned up cards with this mod when all was well?