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7950 Questions

post #1 of 9
Thread Starter 
How much would a 7950 need to be overclocked to match or beat a GTX670? It's currently running stable at 1Ghz/5.2Ghz memory and scores ~27000 in 3DMark Vantage Performance Preset.

Also should I OC my Phenom to keep up with it? Say like 3.8-4Ghz? Or should it be fine? I play at 1680x1050.
post #2 of 9
they are pretty equal. i'm guessing 1100/1250. here was mine . . .

http://www.3dmark.com/3dmv/4536111

it was a bad oc'er. that run, though, was not maxed yet. the cpu influences the score much in this bench.

edit: yes, 4GHz will work fine. it can max out most games with that combo. Bottlenecking the gpu will show in games like BF3 MP.
Edited by rdr09 - 6/21/13 at 6:00am
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post #3 of 9
Quote:
Originally Posted by ATSi View Post

How much would a 7950 need to be overclocked to match or beat a GTX670? It's currently running stable at 1Ghz/5.2Ghz memory and scores ~27000 in 3DMark Vantage Performance Preset.

1000MHz core seems about right to match a GTX670

You'll need approx 1100mhz core to match a GTX680.
post #4 of 9
Hi guys

Sorry to hi-jack this thread, but I recently bought a Sapphire HD 7950 Vapor-X 3GB boost edition.
I pressed the button on the card to change it to the Boost Bios at 950/1250 from 850/1250 an 100Mhz core increase.

But then I used MSI afterburner to overclock it to 1050/1375 (5.5Ghz effectively) using the Boost bios.
I was just wondering, will overclocking the GPU affect the lifespan of the card? Since I didn't touch the voltage whatsoever.

I was going to push it to 1150/1450, 200Mhz increase in both core and memory but was scared that the card might get hot and reduce the life, since I will be running at that speed most of the time?
Also, I heard that as long as you don't touch the voltage it would be fine? But wouldn't the increase of the heat damage it as well?

I'm still new in GPU overclocking.

Thanks
Key
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post #5 of 9
Quote:
Originally Posted by keymaster07 View Post

Hi guys

Sorry to hi-jack this thread, but I recently bought a Sapphire HD 7950 Vapor-X 3GB boost edition.
I pressed the button on the card to change it to the Boost Bios at 950/1250 from 850/1250 an 100Mhz core increase.

But then I used MSI afterburner to overclock it to 1050/1375 (5.5Ghz effectively) using the Boost bios.
I was just wondering, will overclocking the GPU affect the lifespan of the card? Since I didn't touch the voltage whatsoever.

I was going to push it to 1150/1450, 200Mhz increase in both core and memory but was scared that the card might get hot and reduce the life, since I will be running at that speed most of the time?
Also, I heard that as long as you don't touch the voltage it would be fine? But wouldn't the increase of the heat damage it as well?

I'm still new in GPU overclocking.

Thanks
Key

don't be scared. you can definitely overclock if your chip is stable in games and benchmarks. if you are running at stock voltage there is not much risk at all. when overclocking monitor core and VRM temps. they are important in maintaining stability and longevity of the card. core temps below 70c and VRM temps below 90c are safe. i would advise you to find the max stable core overclocks and then push for memory. normally 1150 mhz at stock voltage is a very good overclock. good luck.
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post #6 of 9
Quote:
Originally Posted by raghu78 View Post

don't be scared. you can definitely overclock if your chip is stable in games and benchmarks. if you are running at stock voltage there is not much risk at all. when overclocking monitor core and VRM temps. they are important in maintaining stability and longevity of the card. core temps below 70c and VRM temps below 90c are safe. i would advise you to find the max stable core overclocks and then push for memory. normally 1150 mhz at stock voltage is a very good overclock. good luck.

Thanks for your fast reply!

I'm currently running 1050/1375 with stock voltage.
I ran Furmark 1080p bench and my temp went to about +/- 74 degrees, with the fan speed upto 75%, which is damn loud. and its in a Lian-Li MiniQ, so the airflow is really limited.
But when I'm in Grid 2, maxed out settings on 1080p res, the gpu is at about 62+/- and fan speed about 45%. Which I believe its a pretty normal temp??

I think i'm going to stick to 1050/1375 for now, until I get my Prodigy with better airflow then i shall push for max overclock at stock voltage.

Also, my cousin has a Galaxy GTX670 2GB OC card, he said when he got the card its running 1006 or 1030 stock and boost it to 1060 or 1080 core, and he might clock it to 1130, so i was wondering, how much do I need to clock my HD7950 to match/pass his performance?

My Card: http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&pid=1547&psn=&lid=1&leg=0
My cousins card, with difference cooler design: http://www.galaxytechus.com/usa/productview.aspx?id=193
Thanks
Key
Edited by keymaster07 - 6/22/13 at 3:16am
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post #7 of 9
Quote:
Originally Posted by ATSi View Post

How much would a 7950 need to be overclocked to match or beat a GTX670? It's currently running stable at 1Ghz/5.2Ghz memory and scores ~27000 in 3DMark Vantage Performance Preset.

Also should I OC my Phenom to keep up with it? Say like 3.8-4Ghz? Or should it be fine? I play at 1680x1050.

What 670 against which 7950? I have the direct cu top v2 7950 and it wouldn't take much to go past a stock reference 670.
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post #8 of 9
Quote:
Originally Posted by keymaster07 View Post

Thanks for your fast reply!

I'm currently running 1050/1375 with stock voltage.
I ran Furmark 1080p bench and my temp went to about +/- 74 degrees, with the fan speed upto 75%, which is damn loud. and its in a Lian-Li MiniQ, so the airflow is really limited.
But when I'm in Grid 2, maxed out settings on 1080p res, the gpu is at about 62+/- and fan speed about 45%. Which I believe its a pretty normal temp??

I think i'm going to stick to 1050/1375 for now, until I get my Prodigy with better airflow then i shall push for max overclock at stock voltage.

Also, my cousin has a Galaxy GTX670 2GB OC card, he said when he got the card its running 1006 or 1030 stock and boost it to 1060 or 1080 core, and he might clock it to 1130, so i was wondering, how much do I need to clock my HD7950 to match/pass his performance?

My Card: http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&pid=1547&psn=&lid=1&leg=0
My cousins card, with difference cooler design: http://www.galaxytechus.com/usa/productview.aspx?id=193
Thanks
Key

don't bother with furmark. its an unrealistic workload . games / benchmarks are more relevant for stability testing . for testing i would advise 3dmark 2013, unigine heaven 4.0, unigine valley for benchmarks . for game testing your overclock i recommend crysis 3, battlefield 3, tomb raider, sleeping dogs. at the same clock HD 7950 is 5% slower than HD 7970. so normally HD 7950 at 1100 - 1125 mhz is on par with HD 7970 Ghz (1050 mhz).

clock for clock HD 7950 is faster than GTX 670. so HD 7950(1150 Mhz) will compete with GTX 670(1250 mhz). the cards will trade blows depending on game but in general HD 7950 will win more. also run the HD 7950 with power control maxed at +20% to avoid clock throttling. here is a HIS HD 7970 and HD 7950 overclocked

http://www.legionhardware.com/articles_pages/his_7970_iceq_xsup2_ghz_edition_7950_iceq_xsup2_boost_clock,13.html
Edited by raghu78 - 6/22/13 at 3:48am
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post #9 of 9
Quote:
Originally Posted by raghu78 View Post

don't bother with furmark. its an unrealistic workload . games / benchmarks are more relevant for stability testing . for testing i would advise 3dmark 2013, unigine heaven 4.0, unigine valley for benchmarks . for game testing your overclock i recommend crysis 3, battlefield 3, tomb raider, sleeping dogs. at the same clock HD 7950 is 5% slower than HD 7970. so normally HD 7950 at 1100 - 1125 mhz is on par with HD 7970 Ghz (1050 mhz).

clock for clock HD 7950 is faster than GTX 670. so HD 7950(1150 Mhz) will compete with GTX 670(1250 mhz). the cards will trade blows depending on game but in general HD 7950 will win more. also run the HD 7950 with power control maxed at +20% to avoid clock throttling. here is a HIS HD 7970 and HD 7950 overclocked

http://www.legionhardware.com/articles_pages/his_7970_iceq_xsup2_ghz_edition_7950_iceq_xsup2_boost_clock,13.html

Thanks for the advise!

I use furmark to measure what will my temp be if ran 99% for a long time. Just to see how how it bloody gets.
Also, when I ran Grid 2, it uses 99% GPU when gaming? Is that even right? But when loading it drops to like 30% usage...
99% is quite insane for that game, to be honest.

Thanks
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