[Paranjit]

Hi Guys!! :smile:

I want to buy Sapphire 7850 1024mb GPU for my system but as it comes in 2 types i.e normal edition and OC(overclocked) edition, I am confused which one I should go for and why? I had Google about it and got more confused so please help me out with proper reason as in which one should I take and why?
I only know that OC edition is bit costly than normal edition but that is OK for me.

My PC Config: -
MB- Intel DH67CL
Processor- Intel i5-2500k
Ram- Gskill 4gb DDR3
PSU- Corsair CX 600 watts
Cabinet- NZXT Guardian 921
HD- Seagate 500gb &
Current GPU in system- Palit GT 240 DDR5 1024mb (this one i will sale after buying 7850)

So PLEASE HELP!! Thanks in advance. :flowers:

-Kind Regards,
Paranjit.

 

[Tyree]

Re: Sapphire 7850 help!!

Factory OC'ing is minimal and I would not pay extra for it.
Your PSU is lower quality but "should" be OK for the 7850. A good quality 620W would be a the better option for long term use to insure sufficient clean power.

 

[Paranjit]

Re: Sapphire 7850 help!!

Thanks for the reply Tyree

So according to you I should go for Normal Edition? Also Sapphire 7850 power requirement is 500 watts and I have 600 watts, isn't that enough?

 

[Tyree]

Re: Sapphire 7850 help!!

500W is the minimum suggested power from the chipset manufacturer. You want to be at 620W for extended use with a good quality PSU. All PSU's deteriorate over time and the lower quality ones do so faster.

 

[Paranjit]

Re: Sapphire 7850 help!!

OK I got it. I also want to know that if in case, after installing 7850, will the temperature of MB or GPU itself or HDD rise? Because increase in temperature is not good for system, right? It happens when we play high graphics game the temperature rises. Also what is the temperature limit that all of the components can handle so that they don't damage themselves?
What precautions should be taken, if any? Does installing extra fan in system help to cool down the temperature? If Yes, then to what extend?
Also Sapphire 7850 comes with 2 fans, i.e for cooling and heat sink, so does this helps to keep its temperature as low as possible?
Please Help!!

 

[gcavan]

Re: Sapphire 7850 help!!

No way to predict how the installation of any particular device will affect the internal temperatures. Only thing you can say for certain is that each installed device produces heat while it is in operation. Each device has its own recommended operating temperature which you may usually find within its specification sheet.

For system cooling, you should have at minimum, a 12 or 14 cm fan mounted on the lower front and configured for intake, and another 12 or 14 cm exhaust fan mounted on the upper rear. Extra fans may be mounted in the front, rear, or sides as necessary, but do not always give the expected results and may, in fact have an adverse affect on cooling by impairing the (preferred) front to back air flow.

 

[Tyree]

Re: Sapphire 7850 help!!

What temps (CPU-GPU-Hdd-Case) and how do they go when gaming?
One 120mm minimum fan in front & rear is commonly sufficient.
Top and side mount fans, especially side mount, commonly create turbulence and disrupt the desired front to rear airflow causing temps to rise.
If the PSU can keep up, you should be fine.

 

[Paranjit]

Re: Sapphire 7850 help!!

@gcavan: - Thanks for d reply. But, even if we can't predict the internal temperatures then to there must be some extend, I mean lets say max 70 degree C for high graphics game, beyond that it won't increase, something like that, so that I can get rough idea to what the temperature can rise. I am just giving example, number may increase.

@Tyree: - Yes I'll stick to gaming, as it requires more graphics and causes load on GPU.

P.S.: - I guess you both haven't took my cabinet into consideration, have you? Its NZXT Guardian, it has in-built 3 fans, i.e front, rear and side(from where we open cabinet). Still it has 1 more space left to install fan and that is on top.

So my question is, suppose the temperature rises and I installed 1 more fan on top, then will it cause adverse effect? Also GPU itself has 2 fans specially for cooling and heat sink so it will add to overall cooling, isn't it? Just tell me if that fans are meant for cooling and heat sink will it produce the desire effect? Because if I have to install extra fan then it will create mess. Also it may lead to adverse effect according to you guys. Am I right?
Also you guys forgot to mention the temperature limit for each of the components i.e MB, CPU, HDD etc can handle so that they won't damage themselves. I don't need the exact number, just tell me the approx value.
Please elaborate.

 

[Tyree]

Re: Sapphire 7850 help!!

Your front & rear fan should be enough. The side fan may be causing the temps to rise.

What temps (CPU-GPU-Hdd-Case) and how do they go when gaming?
One 120mm minimum fan in front & rear is commonly sufficient.
Top and side mount fans, especially side mount, commonly create turbulence and disrupt the desired front to rear airflow causing temps to rise.
If the PSU can keep up, you should be fine.

 

[Paranjit]

Re: Sapphire 7850 help!!

So should I disconnect the wires of side fan? Also what is the temperature limit for MB? I have heard that on full load temperature for MB should not rise more than 70 degree Celsius or else it will get damage, is it true?
Because right now Palit Gt 240 is installed in my system and on full load it touches 60 degree Celsius so after installing 7850 it may rise to 70 degree Celsius or even more than that, may be I am wrong. Just correct me on this or give me info base on your knowledge.

 

[Tyree]

Re: Sapphire 7850 help!!

Disconnect the side fan, if the temps lower, you know it was a problem.
The new GPU won't directly cause the Mobo temps to rise. If the PSU can't handle the added demand, the temps may rise.

 

[Paranjit]

Re: Sapphire 7850 help!!

OK. Now you already know about my PSU, but according to you it should be 620 watts, isn't it? But mine is 600 watts so if in case it won't handle the temperature then what are my other options? Please don't say to change the PSU which I can't

Other thing I am repeatedly asking is 7850 comes with 2 fans so will it create desire cooling for GPU itself ?

 

[McNinja]

Re: Sapphire 7850 help!!

The corsair CX 600w is closer to a 550w PSU its of decent quality but not a recommended one here on TSF.

Corsair CP-9020048-UK Builder Series CX 600W Power Supply (PSU) - Scan.co.uk

Rail 1 +12V: 46 A
Connectors:

1 x 4pin ATX 12V
4 x 4pin Molex
2 x 6pin PCI-E Power
1 x 8pin CPU +12V
1 x FDD Power
6 x SATA Power

I have a Sapphire 7950. Like this one

The fans keep my GPU at 60C on max settings for BF3 at 1920 x 1080 will max AA and MSAA.

I have 7 case fans though
2 x 120 front pulling
1 x 140 bottom pulling
1 x 230mm side pulling
1 x 140mm rear pushing air out
2 x 120mm top pushing air out

Personally I'd leave the side fan be. If its giving air directly to the GPU it's helping more than disrupting air flow. The air flow is also hampered by whats in the especially HDD's and the holders for hard drives. It'll push in the cool air but by the time it gets over the HDD's it's probably slowed down and the air is not moving quite so fast. That side air hits your motherboard too so its keeping that at a safer temperature too.

 

[Tyree]

Re: Sapphire 7850 help!!

Your PSU is lower quality and, for extended use, you want to be at 620W with a good quality PSU to avoid damage. Your money-your choice.
Disconnect the side fan and see how it goes. They commonly disrupt the desired front to rear airflow and the PC will be quieter. :smile:

 

[Paranjit]

Re: Sapphire 7850 help!!

Thanks for the reply McNinja.

Your cooling system is out of this world hehehe

So according to you more the fans lesser is the heat generated or better way heat gets spread out? So just final question to you should I buy Sapphire 7850 or not along with extra fan which will be installed on top of my cabinet for better air flow?

 

[Tyree]

Re: Sapphire 7850 help!!

So according to you more the fans lesser is the heat generated or better way heat gets spread out?

More fans do not equal less heat if the fans are fighting each other.
One 120mm fan in front & rear is commonly sufficient and maintains desired airflow.

 

[Paranjit]

Re: Sapphire 7850 help!!

@Tyree: - I guess you are confused. First of all I have not yet installed 7850 in my system. I am just collecting the info before I buy it and to be on safe side. Also right now all 3 fans are in working condition with no noise or problems. To add more I am using this system since 9 months except for GPU and HDD which are from my old system.
So why do I need to disable side fan? Also have a look on McNinja's comment he says that side fans actually help MB to keep it cool and you say that it disrupts the desire front to rear airflow. I am in big dilemma now.

 

[Paranjit]

Re: Sapphire 7850 help!!

@Tyree:- If I am not wrong then each fan plays their cooling role to specific area in cabinet. I guess if heat is generated from GPU obviously it will come out from all the direction, isn't it? So rear fan will only take care of the proportion of heat that reaches to him or it will only cool the heat depending upon its capacity, similarly goes for other fans. May be I am completely wrong. But then there are cabinet which comes with more than 3 fans specially for gaming. So I wonder what is the purpose of extra fans if 2 are enough for cooling.

 

[McNinja]

Re: Sapphire 7850 help!!

My fans do not fight each other.

Fans that blow in;
Front, bottom and side

Fan that blow out;
Top and rear.

I have the Corsair 500R case.

@Paranjit
I would buy that extra fan for the top of your case (you call it cabinet?). Heat rises so its safe to assume that putting a fan on top blowing out wards would get rid of a lot of heat.

I also use a cheapish fan controller.
NZXT Sentry-2 5.25" Touch Screen Fan Controller

It also matters if your fans are stock too. The higher performance fans are usually quieter due to better bearings.

These are my idle temperatures and my second is my idle GPU.

 

[Tyree]

Re: Sapphire 7850 help!!

The primary purpose of more fans is more bling. :smile:
There is no designated fan installment but one front (blowing in) and one rear (blowing out) helps insure the desired front to rear airflow and eliminates any concerns.