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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 2755

post #27541 of 38668
Quote:
Originally Posted by Paul17041993 View Post


not if the rest of your rig uses just as much power as the 7970, I overloaded a 550W quite a few times when I had to RMA my seasonic...
now that is curious... in theory it has enough for two 7970s, and OCP should have protected it from a short... I guess you got one with a bad wire or coil and adding the 7970 exposed the fault...
get it RMA-ed if its still under warranty, though I'm not too fond of the use of sub-100buck PSUs with more expensive hardware...

 

a good quality 550w PSU is all you really need IMO. I run a Capstone 550w zero issues on it with my 7950 overclocked to 7970 ish levels. Not sure why you think there are no good Power Supplies at Sub 100.00 levels when there are MANY power supplies @60+ that having amazing build qualities

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post #27542 of 38668
Quote:
Originally Posted by 4LC4PON3 View Post

a good quality 550w PSU is all you really need IMO. I run a Capstone 550w zero issues on it with my 7950 overclocked to 7970 ish levels. Not sure why you think there are no good Power Supplies at Sub 100.00 levels when there are MANY power supplies @60+ that having amazing build qualities
meh ill take my 1.2kw power supply. i have tripped x750 ocp a few times with meh rig !~
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post #27543 of 38668
Quote:
Originally Posted by Mega Man View Post


meh ill take my 1.2kw power supply. i have tripped x750 ocp a few times with meh rig !~

 

in your case sure crossfire 7970s and prolly some pretty hard overclocks I can see but in most cases with a single cpu/gpu i dont see you need anything insane for power. def dont need a 1.2k watt PSU for single setups

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post #27544 of 38668
Wow! ONE of my side panel fan couldn't spin because of the PCI-E cable for the GPU and it made my core and vrm/core temp jump by 5-7C! Running 1.3v/1.5v for my 1215/1675 oc, i was getting 77c max core temp and 84c vrm after like 20 min of gta4, which eventually crashed. I didn't know what the hell was going on until I discovered this. Now I'm back to 72c max core and 78c max vrm after 3 hours of gta and ambient is 29c! biggrin.gif
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post #27545 of 38668
hey guys just have a fairly noob question

can i crossfire my HD7950 with my Thermaltake Tough Power 775 watts

Also i have my 3570k overclocked to 4.5 ghz
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post #27546 of 38668
yes with almost no problems. probably no problems. only on suicide runs have i tripped my ocp on my 8350 ( all components still kicking. too love amd )
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post #27547 of 38668
I don't trust Thermaltake psu's in general, but technically you should be ok Spectre-.
They do have some solid offerings, but in general they are dodgy.
post #27548 of 38668
cool thanks a lot guys

i am gonna pick up my second HD7950 soon
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post #27549 of 38668
I might make a tiny review for when I get my Asus HD 7950 DCII TOP. I've had one before, and was the best card I've ever had. Sold it to try out Nvidia.. regretted that decision.

I like how people compare the DCII cooler, and the 7950 TwinFrozr Cooler, and while its similar in temps and fan noise, they never ever make a remark about the fan speed.

Although this is Russian, it gives a good idea on how slow the Asus fans have to spin to still beat the MSI cooler, at its stock clocks, with a meagre difference of 2 degrees. (17% to 48%). Showing it has a much more cooling capacity, and really at this point, the fans are barely spinning. dB difference was also small, being only 3 dB, 31 to 34.

Once they started OCing to 1100, at 1.187 V, the difference was 14 Db, and 7 degrees celcius, both in favour of the Asus cooler ( Fan speed comparison is 24% to 64%) I find it hard how people keep saying that the TwinFrozr cooler is better.

At 1.25V with the same clocks (1100), the difference is even more, with the difference being 12 degrees and 26% fan speed on the Asus card compared to 76% on the MSI card. dB difference was 20 dB. From this, it shows the TwinFrozr keeps up at default clocks, but just goes down as you OC. Although, 30% fan speed on the Asus card I found when I had it, was the point before I could hear it. So the fans are louder, but have to work alot less.

http://www.overclockers.ru/lab/49680_4/Testiruem_raznye_varianty_Radeon_HD_7950_ASUS_HD_7950_DirectCUII_TOP_V2_MSI_R7950.html

If you use chrome, you can translate it. Interesting read.
Edited by JJ1217 - 7/8/13 at 6:41am
post #27550 of 38668
I have had this problem ever since i got the HD 7970. Did not have it with HD 6970 or HD 5850. Basically my card stock voltage is 1.131v. I use MSI AB and this does not matter what version. I set the voltage to 1.175v and all is well and all but it does not stick forever if you know what i mean. For what ever reason the voltage will drop back to stock.
Ishimura
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Ishimura
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Silent Knight
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