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How to know if my Twin Frozr III R7950 has 7970 PCB? - Page 2

post #11 of 21
Thread Starter 
Also what good is it to have a higher reference PCB?
Thanks wink.gif .
post #12 of 21
It's only important if you plan on water cooling as only one water cooling cpu block is made for the 7950 pcb, which is not that easy to find. The problem is if you buy a gpu block and a msi 7950 twin you can't ascertain if you will receive a 7950 or 7970 pcb. I order a msi 7950 with a 7970 gpu pcb water cooling block and got a 7950 pcb card, which made the block incompatible. Thus, I had to return the msi 7950. I couldn't return the gpu block since the restocking fee would be about $30 to $40 dollars. Thus, I opted to buy a 7970 instead. At the time I purchased my msi 7950 twin I bought it for 379.99, which I received a full refund. At current values and after rebate I can get a 7970 for around $400, which is only $20 more than what I payed for my MSI 7950.

I guess the last reason is the possibility to unlock the 7970 pcb, but I'm not sure on this. The one thing for sure is no one has unlock a 7950 with a 7970 pcb. Thus, I'm not sure if the 7970 pcb is any more better than a 7970, but if you plan to put an after market cooler it's easier to find coolers that use the 7970 pcb design.
Edited by Bekster - 7/20/12 at 7:20pm
post #13 of 21
Quote:
Originally Posted by tw23 View Post

How do I know?
It has a 6+8 power pin connector... But IDK what else to look for.
Thanks wink.gif . thumb.gif

Yes if you have a 8 pin + 6 pin power connector its the HD 7970 PCB. thats confirmed. You can see pictures of the new MSI HD 7950 Twin Frozr with HD 7970 PCB here

http://hardforum.com/showthread.php?t=1704168
Quote:
Originally Posted by tw23 View Post

BTW, I just went to Fry's to pick up my card like 1-2 hours ago, and it looks like I have a 7970 PCB. If I do, do you think it is worth keeping it, or should I return it and order from Newegg to get the three
free games but take a chance on the 7970 PCB?

newegg user reviews confirm the HD 7970 PCB version for the MSI HD 7950 Twin Frozr.Since you have already got the HD 7970 PCB based card just keep it. Unless of course you want the games too. Then maybe you could return it. But I would advise you to keep it.
Quote:
Originally Posted by tw23 View Post

Also what good is it to have a higher reference PCB?
Thanks wink.gif .

a HD 7970 PCB means higher quality board design. MSI HD 7950 Twin Frozr according to the picture above has 7 power phases. Most ref HD 7970 come with 6 power phases. Also the quality of the VRM, capcitors and chokes are better on the HD 7970 PCB. So you will have better stability while overclocking. Also the performance with higher quality components will be slightly better for the same overclocked speeds compared to a cheaper PCB.
Edited by raghu78 - 7/20/12 at 7:37pm
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post #14 of 21
Thread Starter 
Quote:
Originally Posted by raghu78 View Post

Yes if you have a 8 pin + 6 pin power connector its the HD 7970 PCB. thats confirmed. You can see pictures of the new MSI HD 7950 Twin Frozr with HD 7970 PCB here
http://hardforum.com/showthread.php?t=1704168
newegg user reviews confirm the HD 7970 PCB version for the MSI HD 7950 Twin Frozr.Since you have already got the HD 7970 PCB based card just keep it. Unless of course you want the games too. Then maybe you could return it. But I would advise you to keep it.
a HD 7970 PCB means higher quality board design. MSI HD 7950 Twin Frozr according to the picture above has 7 power phases. Most ref HD 7970 come with 6 power phases. Also the quality of the VRM, capcitors and chokes are better on the HD 7970 PCB. So you will have better stability while overclocking. Also the performance with higher quality components will be slightly better for the same overclocked speeds compared to a cheaper PCB.
Thanks so much smile.gif !
You've been a great help wink.gif ! thumb.gif
post #15 of 21
Quote:
Originally Posted by tw23 View Post

Yeah, the 7970's have 8+6 power connectors and from what I heard, 7950's have 6+6's... I'll take a look when I get home. Thanks for your help wink.gif !
BTW, I just went to Fry's to pick up my card like 1-2 hours ago, and it looks like I have a 7970 PCB. If I do, do you think it is worth keeping it, or should I return it and order from Newegg to get the three free games but take a chance on the 7970 PCB?



Seems like all the ones shipping from NE have the new PCB.


I'd start up your card first to see how well it over clocks. If it is a good over clocker then keep it. Stable 1300mhz on gpu with around 1.25v or less is golden
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post #16 of 21
Thread Starter 
Quote:
Originally Posted by SonDa5 View Post

Seems like all the ones shipping from NE have the new PCB.
I'd start up your card first to see how well it over clocks. If it is a good over clocker then keep it. Stable 1300mhz on gpu with around 1.25v or less is golden
Okay wink.gif .
What's a regular oc with 1.25?
post #17 of 21
Quote:
Originally Posted by tw23 View Post

Okay wink.gif .
What's a regular oc with 1.25?

Your goal should be the highest possible clocks for the lowest possible voltage increase. You should be more bothered about temps under load . Keeping temps below 75c should be the target. Also different chips behave differently. Some chips can run at 1.1 Ghz with stock voltage. My advice would be try for 1.15 Ghz with the least possible voltage increase. The perf benefits are esily outweighed by heat / temps / noise increase at clocks aboe 1.15 Ghz.
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post #18 of 21
Hello, so I have a MSI R7950 and after I finish up I am going to look to see if I can find which PCB mine is. So the reason i was posting was to ask what you guys thought about flashing the 7950 to the 7970 vga bios. Yay or nay? Also I haven't flashed vga bios before so my concerns are is how high is the risk. Also do I just download the msi support sites offical bios or how does that work? Oh, not sure if it matters but I did remove my cooler to apply some high quality thermal paste. Was careful and all that. Everything went smoothly just didn't know if it had anybearing.
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post #19 of 21
Quote:
Originally Posted by Th_Remedy View Post

Hello, so I have a MSI R7950 and after I finish up I am going to look to see if I can find which PCB mine is. So the reason i was posting was to ask what you guys thought about flashing the 7950 to the 7970 vga bios. Yay or nay? Also I haven't flashed vga bios before so my concerns are is how high is the risk. Also do I just download the msi support sites offical bios or how does that work? Oh, not sure if it matters but I did remove my cooler to apply some high quality thermal paste. Was careful and all that. Everything went smoothly just didn't know if it had anybearing.

Don't mess with BIOS flashing. Manual voltage overclocking with sapphire trixx or msi afterburner is the best option
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post #20 of 21
So, appreciate the advice. Got my TF3 to afterburners max core/ mem clocks. I know that's nothing to do backflips over, but eh, im satisfied for now.
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T1geRKat
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