The Radeon 7850 is an overclocking beast

[blastingcap]

7850 wins by default since there is no other 28nm competitor for it and 40nm GPUs aren't that much cheaper right now or if they are they have less VRAM. But we'll see what's what when gtx 660 comes out. It may disappoint, it may not, but we'll know by this fall.

 

[Gordon Freemen]

I dont know if you are truly that thick but going back before the 28nm launch, if you tell people they can get gtx580 performance at less than half the power use and for ~$250, most would agree its a good deal.

LOL 7850 is more or less the same performance of a 6950 albeit with higher OC potential but OC will never grant anything more than 5-7fps and that's on the high end of wishful thinking.

 

[Arzachel]

LOL 7850 is more or less the same performance of a 6950 albeit with higher OC potential but OC will never grant anything more than 5-7fps and that's on the high end of wishful thinking.

Also called "you don't know what you're talking about".

 

[Silverforce11]

LOL 7850 is more or less the same performance of a 6950 albeit with higher OC potential but OC will never grant anything more than 5-7fps and that's on the high end of wishful thinking.

Im going to say this nicely, but you are talking out of your rear end. You waltz in here in to a thread with many 7850 OWNERS who've pushed the OC and got amazing performance gains and make stupid remarks that insults the intelligence of every one here. As if you know more about 7850 OC or performance than all the owners here. So if u have nothing else valid to contribute, stop crapping on threads please.

 

[Jaydip]

7850 scales almost linearly with clock speed increase.Its a very good card for the price.I should have bought this instead of the 7950 DC II for my brother.Compared to 7850, 7950 is a very timid overclocker.

 

[Gordon Freemen]

Im going to say this nicely, but you are talking out of your rear end. You waltz in here in to a thread with many 7850 OWNERS who've pushed the OC and got amazing performance gains and make stupid remarks that insults the intelligence of every one here. As if you know more about 7850 OC or performance than all the owners here. So if u have nothing else valid to contribute, stop crapping on threads please.

7850 owners you say or do you actually mean raging fan boys wheres the links to these wild claims is all I am asking for is soild un biased well founded and documented facts by the likes of such internet sites as this one, Toms Hardware, OC3D, Guru3D, just to name a few. Heck even a member posted youtube video with Msi Afterburner, of fraps, and GPUZ for proof of ownership would sufic but you guys have given nothing but wild claims like 51% OC LOL

 

[tornadog]

I had a HIS 6950 unlocked bios and o/ced to 6970 speeds. My 3DMark 11 score was 5830 with the exact same setup in my sig. With the 7850 at 1200/1400, my score jumped to 7005. My only complaint is the fan is pretty loud even at 40%, which it seems to hit whenever I play anything or run benchmarks.

 

[Ropey]

7850 owners you say

The prosecutor objects.

http://www.youtube.com/watch?v=Daakgai-cAs

Heck even a member posted youtube video with Msi Afterburner, of fraps, and GPUZ for proof of ownership would sufic but you guys have given nothing but wild claims like 51% OC LOL

And you have nothing but feeble protestations against the reality of this card's ability to overclock. So much so that you attack owners instead of the card.

Fail (imho).

Yep, that's pretty clear 'to me' Arzachel. But then I own one as well.

 

[Don Karnage]

7850 owners you say or do you actually mean raging fan boys wheres the links to these wild claims is all I am asking for is soild un biased well founded and documented facts by the likes of such internet sites as this one, Toms Hardware, OC3D, Guru3D, just to name a few. Heck even a member posted youtube video with Msi Afterburner, of fraps, and GPUZ for proof of ownership would sufic but you guys have given nothing but wild claims like 51% OC LOL

How is a gpuz verification and benchmarks runs equal wild claims? Your welcome to leave this forum at anytime. All you seem to do is try and start flame wars

 

[chimaxi83]

LOL 7850 is more or less the same performance of a 6950 albeit with higher OC potential but OC will never grant anything more than 5-7fps and that's on the high end of wishful thinking.

Also called "you don't know what you're talking about".

Its been shown time and time again, Gordon, that if you buy 7850 and overclock to its potential, you will get substantial gains like above.

Its also been shown time and time again, Gordon, that you have no idea what you're talking about. You're new bro, do you go places in real life that you've never been and spout nonsense, start fights, and act like you own the place too? Don't, because you won't get far.

 

[Vesku]

How does 7850 OC compare to 7870 OC?

I know that right now the 7870 is kind of meh in terms of price/perf but I expect the 7850 and 7870 to have a nice price adjustment when Nvidia finally launches their 660 products.

 

[Concillian]

all I am asking for is soild un biased well founded and documented facts by the likes of such internet sites as this one, Toms Hardware, OC3D, Guru3D, just to name a few.

I'm not sure what your position is. Are you actually thinking that 10+ people in this thread reporting OC results and benchmarks are all fabricating them in some kind of elaborate consipiracy?

7850 is a dog at stock. There's no question about that. Stock it's a mediocre value at best. But the thing has legs.

The review sites are all showing 1050 OCs because of the artificial OC limitations put on the already artificially low clock given to the 7850 to keep it from directly competing with the 7870 (which was a laughably $100 more expensive at launch.)

Once we clear the artificial hurdles, the card OCs like ALL the other AMD 28nm cards do when pushed 1100-1300 MHz depending on voltage and luck of the silicon lottery. 7950, 7970, 7870, 7770.... all of them are reaching pretty much the same OCs when they get proper cooling and voltage.

It's really simple logic and pretty cut and dry.
Now if you believe that like a dozen of us who own OCed 7850s are all conspiring to make this all up, well, to that I must lol... lol while getting OCed GTX580 performance for a low price and power consumption.

 

[Concillian]

How does 7850 OC compare to 7870 OC?

I know that right now the 7870 is kind of meh in terms of price/perf but I expect the 7850 and 7870 to have a nice price adjustment when Nvidia finally launches their 660 products.

Looking at the leaked specs, the 660 lineup is pretty meh.

nVidia would have to be brain dead not to clock the 660s to beat the stock 7850 and stock 7870, I'm absolutely positive that stock for stock, the 660 cards will beat the 7850 and 7870 price competitors. However, I don't leave anything stock, and I bought now rather than waiting because based on the leaked specs (that were 100% correct on predicting the the GTX 680 and 670 specs), I don't believe the 660 cards will be able to keep up OC vs. OC.

That and I was on a 5770 and wanting an upgrade.

Now they may be re-spinning the 660 to add to it so it can keep up more easily. Perhaps that's why it's June and we still haven't seen anything but the halo chip from nVidia. I don't really know.

At the time the 7870 was WAY more expensive, but now the 7870 has come down some and can sometimes be bought for just $20 or 30 more than a 7850. At that cost it's competitive. I'm not sure how much a 660 will push these prices down. It will have to be a different 660 than is in the leaked specs I've seen, as I just don't see those specs competing at anything other than stock vs. stock

A 7870 will reach the same OCs as a 7850. It has additional VRM capability to better handle the extra power at high OCs, and it has some extra shaders for some extra performance at a given clock speed.

The 7870 has 25% more shaders, but no more memory bandwidth, cache, or ROPs. How that translates to performance depends on the game. Shader heavy games will see larger benefits than other games. Some games see only ~5-10% improvement from the extra shaders, while others see 15-20% improvement. On average you're looking at 10-15% more performance. If you can get this with 10-15% more cost, then it's a good option.

Overclocks will be in the same range as the 7850, so you can pretty much assume equal clocks.

 

[SickBeast]

Guys just report Gordon's posts. He tried to bait me into a flame war as well in another thread.

 

[Don Karnage]

Guys just report Gordon's posts. He tried to bait me into a flame war as well in another thread.

Just add him to your ignore list.

 

[RigRebel]

TDP can give you a clue about how much thermal energy needs to be dissipated for a part--a guideline for how much cooling is necessary. TDP is not going to be lower than the actual average power draw though peaks can go higher. And with overvolting and overclocking, power draw can be much more than TDP.

Given the above, let's begin:

A 2500K's TDP is 95W: http://ark.intel.com/products/52210

According to this, the entire system draws just over 200W for a 2500K clocked at 4.6GHz, which is far higher than 4GHz and doesn't account for PSU inefficiency. http://www.kitguru.net/components/cpu/zardon/power-consumption-fx-8150-v-i5-2500k-v-i7-2600k/ (Also, Don's bit-tech link showed the entire rig drawing 161W for the stock 2500K at load.)

Given that a mobo, RAM, fans, etc. will eat a decent amount, plus the PSU inefficiency thing, plus the fact that 4.6GHz probably means a higher voltage, PLUS the overclock, and given that at stock a 2500K's TDP is 95W, and given the bit-tech and Kitguru graphs that imply that the rest of the system is drawing something like 40W (you can actually get some good info on non-CPU/GPU power draw in this review: http://www.bit-tech.net/hardware/pcs/2010/02/24/energy-efficient-hardware-investigated/8), I am going to guesstimate that a 2500K@4GHz will have a peak power draw of about 120W, or 10 amps on the 12V rail, for normal programs, maybe a little higher when running LinX.

And I already outlined why the 7850 is very unlikely to draw anywhere near 200W peak even with a high overclock, though if you did something crazy like 1.3 watts and 1.4GHz with liquid nitrogen or something then yeah, maybe.

Plus it's unlikely that the CPU and GPU would peak at exactly the same time so you can't just add two peaks together; realistically their combined peak will be a little less than that.

So I'd estimate that the combined peak load of a 2500K@4GHz and a 7850 at, say, 1200core/5000memory or something like that would be about 300 watts at absolute most (peak + peak, both running stuff like LinX and Furmark). Which is well within what you said your PSU could sustain on the 12V rail, though if it's a cheap PSU then they often exaggerate what their max sustained load is.

I love these analytical, mathmatical, bean counters ... Real word 261W OC on 7850 :/ no nitrogen lolz. > http://www.anandtech.com/show/5625/...-7850-review-rounding-out-southern-islands/19

 

[CursiveQ]

hi guys, i recently purchased the GIGABYTE 7850. I've been trying to do some minor overclocking 1250/1200 memory but keep getting crashes/green lines. I'm from reading this thread it seems like many people are getting way higher speeds than me. so my question is, did i get a bad card? I still have the option of returning. should i go for the sapphire 7850 instead?

also, a noob question, what do i do when i overclock the card too much and it keeps crashing? every time windows loads and the drivers load it crashes. but i can't load catalyst control center in safe mode. thanks

here are the two for reference:

one i have right now : http://www.newegg.com/Product/Produc...82E16814125419

or if you guys recommend another 7850 please let me know. thanks.

the sapphire one: http://www.newegg.com/Product/Produc...82E16814102986

 

[chimaxi83]

hi guys, i recently purchased the GIGABYTE 7850. I've been trying to do some minor overclocking 1250/1200 memory but keep getting crashes/green lines. I'm from reading this thread it seems like many people are getting way higher speeds than me. so my question is, did i get a bad card? I still have the option of returning. should i go for the sapphire 7850 instead?

also, a noob question, what do i do when i overclock the card too much and it keeps crashing? every time windows loads and the drivers load it crashes. but i can't load catalyst control center in safe mode. thanks

here are the two for reference:

one i have right now : http://www.newegg.com/Product/Produc...82E16814125419

the sapphire one: http://www.newegg.com/Product/Produc...82E16814102986

Are you giving it more voltage? What are you using to overclock? What driver version are you using?

For your second question, sounds like you have the (unstable) overclock set to load when Windows starts. Remove that option, start up at default every boot, and overclock it once you're in Windows.

 

[CursiveQ]

Are you giving it more voltage? What are you using to overclock? What driver version are you using?

For your second question, sounds like you have the (unstable) overclock set to load when Windows starts. Remove that option, start up at default every boot, and overclock it once you're in Windows.

i used both catalyst controller and msi afterburner. i am not increasing the voltage. how do i remove that option from CCC when i can't even load it? thanks for your help

according to the msi afterburner my driver version is: 7.14.10.0903

 

[chimaxi83]

At the bottom of the main Afterburner GUI, do you have "Apply overclocking at system startup" checked?

 

[CursiveQ]

At the bottom of the main Afterburner GUI, do you have "Apply overclocking at system startup" checked?

i turned that off with msi after burner. i had to uninstall catalyst controller completely because every time i load catalyst controller the computer would crash. i guess my question is do i have to just abandon that program all together ? i don't mind though if so.

 

[chimaxi83]

Try a fresh install of drivers and Afterburner. Remove all traces of both and reinstall them. That should solve your crashes on startup.

Also, are you saying you're getting 1250 core without adjusting voltage? If so, first off that is an excellent overclock, and second that is probably your limit on stock volts. Which again, is excellent if that is the case.

 

[CursiveQ]

Try a fresh install of drivers and Afterburner. Remove all traces of both and reinstall them. That should solve your crashes on startup.

Also, are you saying you're getting 1250 core without adjusting voltage? If so, first off that is an excellent overclock, and second that is probably your limit on stock volts. Which again, is excellent if that is the case.

sorry i meant 1050 core. that's not much right?

 

[chimaxi83]

sorry i meant 1050 core. that's not much right?

lol, ok that's more like it. That's not bad, especially at stock volts. That's already nearly a 200 MHz overclock over the 860 MHz stock.

Read through this thread, you'll see some good results with this card and a little extra voltage.

 

[SickBeast]

Cursive, 1250mhz core is not a "minor" overclock just FYI.