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[Official] 7870 Tahiti LE (XT) Owners Club - Page 145

post #1441 of 5206
Idle VDDC has nothing to do with VRM of that I can guarantee you. The amount of voltage including Vdroop at load is what determines the VRM temp and how much Vdroop is applied. The lower the Vdroop(s), the higher the VRM temps because higher voltage. This is a double entendre. Higher temps for higher stable clocks. Therefor in fact I ascertain that cards with better overclocking ability will run hotter. Anyway just my opinion.
post #1442 of 5206
morning all. started my windows 7 drive up yesterday before bed, got a vddc of 1.3 to 1.5 also checked my asic 58% do u think that has anything to to with why my gpu and vrm are running so cool????
morning beasz
post #1443 of 5206
im stable at 1190 gpu
1580 memory.
1600 screen freezes in occt

gpu can go higher but im sure i see the occasion artifact so 1190 fine by me,hynix memory
post #1444 of 5206
Quote:
Originally Posted by tugger434 View Post

im still looking for a better fan to replace the noisey one istalled on my club 3d version


looks like it would move alot more air across pcb the way the blades r facing

looks like that framework could be adapted to sit ontop of the card, held in place with a hot glue gun,the depth the fan sits could be adjusted to allow optimum air movemet under the shroud, as i think current fans r way to close to the cooler

Noooo.. these fans are terrible, they generate VERY little pressure
post #1445 of 5206
Quote:
Originally Posted by beasz View Post

the only thing powercolor myst have going for it is , ZERO coil whine .. it uses

Gold Power Kr design where it uses 5+1+1 phases board power design to enhance power efficiency and stability. Additionally, DrMos and IR Digital PWM are used to minimize switching loss and maximize the power efficiency

i think that is a plus , even tough the stock cooler sucks

Marketing BS.. If the saph xt was the same price as the myst, I'd pick the saph because of the VRM heatsink on there is bigger... and VRM temperatures makes the biggest difference on OC on the 7870 tahiti..

I got the myst for $160 after I sold the game. the saph would've cost me $25 more at the time.. i didn't think that heatsink was worth $25, LOL, but yea,

IF anyone's making the decision NOW... and they're the same price.. GET THE SAPPHIRE XT thumb.gif
post #1446 of 5206
Quote:
Originally Posted by beasz View Post

YEAHH .. you noticed too lol ...dat why i sk if you running windows 8 , because my vddc @ idle is 3.8A!!! and your s 2.0A
windows 8 runn all these "gpu accelreated processes" ..this getting interesting ...if your on win 7 that would explain a little about some things- i am running win 8

i can push to 1175 max OCCT


are you on bios .032??? bios .028 is sooo wasteful temp wise ..now i am thinking it set for more volts too? i found my vrm temps 10C lower with .032 but it is for elpida , the one "they" powercolor sent me. i get lines across the screen -"tearing artifacts" so sadly i cannot use it .. and i thought it was a bleesing to find hynix on my card ..i am seeing it is not soo ..elpida is more compatible with the bioses

MORE VOLTS equal M0ar overclock... YOU WANT MORE VOLTS tongue.gif

SADLY though, .28 gives you the same volts as .30

I haven't tried .32 because if you're telling me it gives LESS voltage, then I don't want it. thumb.gif
Edited by tp4tissue - 4/26/13 at 1:18am
post #1447 of 5206
Quote:
Originally Posted by 354145 View Post

Is it normal for a Sapphire 7870 XT to get artifacts when ever going above 1150mhz / 1500mhz even with forced voltage set to 1.3?
In ungine heaven i am even getting artifacts at 1150, but they are so incredibly difficult to notice that im not sure if it makes a difference, does it?

I'm getting red and green kind of "blurry" circles/spots (not perfect circles, and the red/green fades towards the edges so there is no clear line) when looking at the smoke coming out of the chimney in ungine heaven for example. I am also getting these artifacts when the camera "focuses out" so the background is blurry. Ocassionally i even get checkboard patterns with varying colours in these types of situations.

Just wondering if there is something wrong with my card or if this is just as high as it goes smile.gif, i apreciate any help!
Quote:
Originally Posted by 3n3rg3ia View Post

On my xt I'm having artifacts only when I overclock higher than 1200mhz the core, and they are just a few, at 1240 it starts to artifact a lot.. But I had power limit to +20% bare in mind not all chips the same, I don't know why this happens tho, it makes a company look bad.....

These cards run at 925 stock, 975 turbo. Anything above that is overclocking and it's "normal" for a device to malfunction when pushed beyond a certain pint, that point may vary from one chip to another, but one fact is for sure - overclocking is not guaranteed.

If you can push 1150 without issues and only above that you have problems, you get an 18% OC above stock turbo speeds. 1200 is even better. Having artifacts past a certain OC point is normal for any brand and any model I believe, it's the chip failing to go past a speed it was not designed to go past. Nothing unusual and I don't know what would make a company look bad in that. A chip that malfunctions at stock speeds - that makes a company look bad. But only if it happens to many chips and they have no reaction to the problem. That's what I think at least.
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post #1448 of 5206
Quote:
Originally Posted by tugger434 View Post

morning all. started my windows 7 drive up yesterday before bed, got a vddc of 1.3 to 1.5 also checked my asic 58% do u think that has anything to to with why my gpu and vrm are running so cool????
morning beasz

Quote:
Originally Posted by tugger434 View Post

im stable at 1190 gpu
1580 memory.
1600 screen freezes in occt

gpu can go higher but im sure i see the occasion artifact so 1190 fine by me,hynix memory

top of the mornin' to you tugger434. you got a good card for sure. i belive most are suppose to be like mine and worse lol..atfer all the "LE" is hd 7950 "rejects" .. i had a hd 7950 also..i like the LE alot. better price/performance .i dont feel a gpu should cost as much as a whole pc.. i remember when i bought the AMD X1900XT for $524 in 2005..the card only "lasted 4 months before it was outdated .. DISGUISTED!! .. i said never aGAIN!! i keep the card though for 6 years in my brothers pc.. it cost so much and old so fast , i was trying to get my $$$ worth, so i couldnt get rid of it- it was only worth about $120 in 2006 maybe?
so that why i like the LE over the hd 7950 becuase the price/performance ratio .. and when done i put in $ 180. would have been $150-$ 160 had i not bought a aftermarket cooler. and when it get "old" i wont lose as much $$ - even though gpus are lasting longer now with new games- example the GTX 460..
Edited by beasz - 4/26/13 at 5:39am
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post #1449 of 5206
Wow, I must be lucky. Runs cool and no problems at a 1200 core clock. I did have to flash to .028 BIOS to make it run properly.



post #1450 of 5206
Is there a BIOS for the Powercolor Myst with Hynix RAM? If so, please link me to a download. smile.gif
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