TDP stands for Thermal Design Power, it's the amount of heat generated by the components NOT it's power consumption.

Nah, the 280 use less than 200w when gaming. Usually around 150-180, depend on the core clock.

Then isn't it easier to remember that:

Total power consumption = heat generated + actual work done by the component

Then the power consumption can be higher

http://www.techpowerup.com/reviews/Gigabyt...280X_OC/24.html



Bear in mind that there's hardly 280x reference cards, most of them are slightly overclocked like on this gigabyte card.

the 280 is higher clocked version than the 7950 boost.

http://www.tomshardware.com/reviews/sapphi...9-280,3914.html

even 270X is 180w max

better safe than sorry, some game's UI is crazy like on AS Unity's menu screen in game, the GPU ramps up to crazy heat and power consumption if didn't turn on Vsync

This post has been edited by terradrive: Apr 13 2015, 09:15 PM

Your equation is wrong. Power consumption depends on load. P=IV, the higher the load the more current the component needs hence higher power usage, even if the voltage stays the same but if the load is low it consume less current hence less voltage. Different games puts different load on GPU. The Maximum graph you put is using synthetic power virus Furmark program which is irrelevant.

AC Unity menu is bad example as it's just that game have that problem.

His most likely problem is vBIOS because he already fixed it after people recommending him to update it. The flickering issue on 280 cards are well known all over the internet.

Dude, my equation is totally irrelevant with yours. It is totally different thing.

http://en.wikipedia.org/wiki/CPU_power_dissipation


The equation I posted is really basic in terms of engineering. P = IV is describing an entirely different matter.

Furmark is the max power consumption the card can ever get, however one and rare example of AC Unity menu bug can cause abrupt increase of power consumption. Such thing is very hazardous to low end power supplies, some of which can even burnt out because lack of proper overpower overload protection.

Also notice the peak power is at 244w, that's is achieved on crysis 3 IINM.

I saw the posts about the flickering and glad about him fixing it. But the recommended PSU requirements by AMD for 280X is still 750watts, that's far cry of the current 500 watts.

EDIT: found more sources: http://sciencebitz.com/?page_id=13


This post has been edited by terradrive: Apr 13 2015, 10:50 PM

hm why all sudden count Watt usage ?? and Cooler Master Watt Calculator reliable ?

http://www.coolermaster.outervision.com/

It's not an entirely different matter, it's basic electronics. Electrical stills play with current and voltages. The main question is TDP which is still means Thermal Design Power is is NOT equals to power consumed. Also TDP varies from one company to another, AMD rated it's CPU TDP differently from Intel, so does nvidia and AMD GPU.

Nobody 'plays' Furmark', as I said it's irrelevant because some GPU automatically detect this porgram and put a limiter to prevent the card from overheating or using too much power. The peak power is from Crysis 2 which clearly shows on top of the page.

You are delusional. Show me where does AMD stated that R9 280X requires 750W on SINGLE CARD. Read the review on Guru3D on R9 280X TwinFrozr power consumption. They stated what are the recommended PSU down there.

Who is the one that is delusional here?

First, Assassin's Creed Unity have the menu bug which draws big power from the card, why did you conveniently dropped this from your argument? Answer this.


Second, the peak power shown is 239 watt from your link, 244 watt from my link. It is near 250 watt as claimed by AMD. That is not small power figure. Please, games aren't the only ones draining huge power from GPU.



If you are so sure about the card will automatically throttle because it was designed that way, why don't you help those manufacturers write their BIOS?
gtx 970 & 980 were touted as power sipping GPUs, look at how much power the aftermarket cards use when running cuda. Same thing with Radeons be able to run OpenGL.

Oh hey, how convenient that the page you linked stated this:

I guess no need to play safe, just let the PSU burnt out and take some components out is all right and dandy

Third, cherry picked MSI card with stated lower PSU requirements? Please.

http://www.sapphiretech.com/presentation/p...pid=2022&lid=1#


http://www.powercolor.com/US/products_feat...2#Specification


http://www.asus.com/my/Graphics_Cards/R928...specifications/

Wow this is interesting, Asus stated power consumption up to 300 watts

I'm conveniently leaving out Gigabyte 280X which states 600 watts PSU requirments, because it's to follow your style of cherry picking.


Fourth, in CPU, people doesn't use P = IV. People use a more specific formula that is P = CV2f. If you didn't know then stop talking about current and voltages.

This is quite funny, the power supply is the heart of the entire system, pumping out electricity instead on blood in a human's heart, and users always skimp on this very important part.

EDIT: Look at his power supply, the Gigabyte Powerrock 500w specifications:



2 rails of 12v with 18 amps each, and total of 432 watt delivered stacked on 12 volt rails. So technically his power supply isn't 500 watts. Not to mention 18 amp rail can deliver a theoretical 216 watts of power. That is already too close for comfort. For high end cards that has TDP of 250 watts it is usually recommended to have at least 24 amps on the 12 volt rails. Heck a good quality Seasonic G 450 watt have 37 amps on the 12 volt rails.

This post has been edited by terradrive: Apr 14 2015, 09:33 AM

How long do you stay on menu? Can you see why I say you delusional over one measly game with it's menu bug?

I agree but did he mentions any problem from that list? He even say there is problem with Chrome, whic is not game related.

Wha? How it comes to this? It's OpenCL on OpenGL. We are discussing games not GPGPU performance or it's power consumption.

And you right now starts to pick every single 280X cards for no obvious reason. The guy with the problem himself saying his card is fine now. I'm still waiting for official AMD saying single R9 280X cards requires 750W PSU like you stated before.

I don't want to go to specifics on equation. I just put the most basic formula.

Agreed that his PSU is crappy but if he say is all good. Why don’t you tell him?

new driver for gta v has come out, but its beta..
i still dont understand should i get the beta?...
whats the different with the one im using now?. 14.2?.

What do normal people do when they need to pause? Which one is delusional now?

I just stated about his power supply as one of the culprit, and you are the one who started by dragging on the my post about TDP

You stated the GPU will auto throttle, but it doesn't do that on both GPGPU and furmark. Normal users still can run these things. Avoiding this by tai chi "who is playing this anyways" is just plain ignorance by you.

Those power supply requirements are recommended by GPU manufacturer that you should follow, not the official specs because duh, aftermarket cards usually comes pre-overclocked? You want me to post the source about the official power requirements? good tai chi skills there.
Don't you know if there's multiple recommendations, you should always follow the safest one?

Wow, most basic formula but can't understand the second law of thermodynamics. You said my equation wrong before and brought up an unrelated equation of P = IV, what a fail.

I think you need to check your eyes:




Please, stop embarrassing yourself anymore.

This post has been edited by terradrive: Apr 14 2015, 12:21 PM

Just do it. Just test it. Hahahaha.

grand theft auto V yaa... but im more happy to play my old old Fav... " war for the overworld(Dungeon Keeper Copy ?)

You still using 14.2?

8mhz higher in that review.

From TH's old 7950 review. Though these card clocked at 900mhz highest but i doubt +50mhz will increase the power consumption significantly without increasing the voltage.


and GPGPU. Notice the 7970 consumed much more power?


From Hexus.net http://hexus.net/tech/reviews/graphics/675...dual-x/?page=10


From HardOCP. http://www.hardocp.com/article/2014/10/14/...o_card_review/9

They didn't touch the voltage though.

Some 7950/280 had voltage locked at 1.25v thus will get higher power consumption. My card 2nd boost BIOS had a voltage locked @1.25v and it's not stable, i undervolt it and work like a charm.



I limit my frame to 200fps systemwide with RTSS, like you said.. better safe than sorry.

This post has been edited by Acid_RuleZz: Apr 14 2015, 02:42 PM

yeah i guess..

it says Catalyst Version | 14.12 AMD Catalyst Omega Software
i also do software update but amd doesnt seems to find new update for my driver...and also i keep thinking "if its not broken, why fix it".

do i need the beta driver?, i still doesnt understand all this beta driver and whats the different with normal driver.

terradrive
Reading all your explanations really brings back those nostalgic moments here, where Heat Transfer and Thermodynamics was one of my fav subject back in college. Malangnya today everything give back to lecturer di.

I have personally run factory overclocked R9 280X and HD 7950 before with a Corsair GS600, a decent 600W PSU, fully tested with a number of games minus FurMark of cos. I can safely say that the 750W recommended by manufacturer is likely (don't quote me) stated there with added buffer to probably take into consideration those sub-par 750W PSU that would only effectively supply ~ 550 - 600W (which is where a standard system with this card consumes, refer to Guru3D's review). Mind you, a very large number of ppl may not know much on PSU and what an important role it can play. Someone might just plug in a cap ayam 600W thinking that it can safely power up the 280X only to know that that it can only effectively supply ~ 300W only. So better just bloat it up and just put 750W, win-win for everyone.

I still cannot find an official power figure from AMD for its R9 280X / 280 cards. Long ago, I did recall seeing the HD 7970's recommended PSU was at least 550W, but now I could not find it anymore.

Thermodynamics was one of my favourite subject too last time

When I bought my PC I only put a HD7870, so I pair it with some cheap PSU of CM Extreme 2 625. Then I gatal want play mining litecoins and upgraded to R9 290. It ran fine even after overclocked.... for a year lol. I guess the PSU degraded and can't stand the high temperature, I got black screens even on idling at desktop.

Then I changed to Seasonic and no more problems. People do say that PSU will degrade over time so I guess it is true. That problematic PSU now ran fine powering my sister's PC which had Athlon II X4 & HD5830, not even crashes lol.

^ So far no problems with the latest beta.

Changing the driver for the first time is quite "scary' for me earlier,TBH. After doing it,no problems so far.
Did the uninstall and install like what AMD wrote on their website.

If you guys using single GPU and playing GTA5, the modded March 11 driver by Asder00 will give you slightly better performance over the newly release 15.4 beta imo.