Author

Topic: 5k series instead of 6k? (Read 1996 times)

newbie
Activity: 41
Merit: 0
June 12, 2011, 03:20:16 AM
#14
n/a
newbie
Activity: 42
Merit: 0
June 11, 2011, 01:28:34 PM
#13
Problem is finding a 5850 or 5870. The 6870 is basically equal to the 5830 for btc mining. Same number of shaders. Running a 6870 at the same 975mhz core clock and 300mhz memory clock as my 5830's gives me ~296 mh/s on the 6870 while I get ~301 mh/s on the 5830's. So basically a wash, hashing wise. Of course the 6870 is around $50 more than those Sapphire 5830's that Newegg had.
69x0 uses more [bit slower]VLIW4 shaders instead of VLIW5 shaders in 58x0, performing comparable.
but 68x0 consume notable less power per.
newbie
Activity: 44
Merit: 0
June 11, 2011, 12:34:06 PM
#12
Can't find dual 5850s anywhere for under 400$  Sad.
Maybe I'll just get what I was gonna get and mine at around 550-600 Mhash/s instead of 600+
member
Activity: 87
Merit: 10
June 11, 2011, 10:04:28 AM
#11
Problem is finding a 5850 or 5870. The 6870 is basically equal to the 5830 for btc mining. Same number of shaders. Running a 6870 at the same 975mhz core clock and 300mhz memory clock as my 5830's gives me ~296 mh/s on the 6870 while I get ~301 mh/s on the 5830's. So basically a wash, hashing wise. Of course the 6870 is around $50 more than those Sapphire 5830's that Newegg had.
newbie
Activity: 12
Merit: 0
June 11, 2011, 01:21:27 AM
#10
Ok so far, at an OC of 1000MHz on the core of the 6870, im only hitting 290MH/s. At stock speeds it only gets 260MH/s. 5850 is a much better choice, of a 5870 if you can afford one.
newbie
Activity: 43
Merit: 0
June 11, 2011, 12:50:54 AM
#9
Quote
the 6950 is about 35% faster than a 6950.

You should fix this so I understand you.
sr. member
Activity: 322
Merit: 250
June 11, 2011, 12:29:09 AM
#8
Well if I had to choose between a 5870 and a 6950, I would go with the 6950. It is the same price, and IF bitcoin ever fails, you can just resell the parts for a minimal loss. Also, in regular computing (F@H/gaming) the 6950 is about 35% faster than a 6950.
newbie
Activity: 44
Merit: 0
June 10, 2011, 05:15:41 PM
#7
That's what I'm worried about Sad, when do they restock?   Sad

Also, I would have to overclock the 5850 up to maybe 900MHZ before hitting 300Mhash/s.....hmm
So....5850 or 6870?
Like i previously said, my 5850 at only 850MHz gets 330MH/s. I'm going to be testing 6870 today to see how much OC is required to reach the 300MH/s mark.
Report back on that to me please, that would be great Cheesy.
hero member
Activity: 633
Merit: 500
newbie
Activity: 12
Merit: 0
June 10, 2011, 04:24:56 PM
#5
Also, I would have to overclock the 5850 up to maybe 900MHZ before hitting 300Mhash/s.....hmm
So....5850 or 6870?
Like i previously said, my 5850 at only 850MHz gets 330MH/s. I'm going to be testing 6870 today to see how much OC is required to reach the 300MH/s mark.
newbie
Activity: 44
Merit: 0
June 10, 2011, 01:38:04 PM
#4
So, what's a dual 5k series GPU I Can get for under 400$ that would be faster than dual 6870s  Grin

Guessing 2 of these?
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125318

I'm looking at the GPU mining comparison charts and it seems like those 2 cards aren't far off from each other.
https://en.bitcoin.it/wiki/Mining_hardware_comparison
Also, I would have to overclock the 5850 up to maybe 900MHZ before hitting 300Mhash/s.....hmm
So....5850 or 6870?
newbie
Activity: 36
Merit: 0
June 10, 2011, 03:52:24 AM
#3
The 58xx series cards have a lot more stream processors than the 68xx series, so they produce higher MH/s rates. I have been testing a 5850 and at 850MHz on core i get 330MH/s. I have just brought a 6870 which i will be testing tomorrow, i can report back tomorrow at to the difference.

5850 = 1440 stream processors
6850 = 960      "              "
6870 = 1120     "             "
That and it's cheaper.
newbie
Activity: 12
Merit: 0
June 10, 2011, 03:49:02 AM
#2
The 58xx series cards have a lot more stream processors than the 68xx series, so they produce higher MH/s rates. I have been testing a 5850 and at 850MHz on core i get 330MH/s. I have just brought a 6870 which i will be testing tomorrow, i can report back tomorrow at to the difference.

5850 = 1440 stream processors
6850 = 960      "              "
6870 = 1120     "             "
newbie
Activity: 44
Merit: 0
June 10, 2011, 03:09:12 AM
#1
Why are people choosing the Radeon 5k series over the 6k?  I was going to get 2 6870s with a new intel i7 2600k build for bitcoin mining but I'm wondering if I should choose different dual GPUs.

Getting 2 of these
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150521

Should I get something else?  I'm trying to get at least 2 for under 400$, plus this has free shipping and 2 fans on it Cheesy.


Also, What would be the speed of the Hashes It would be going at?  I looked on the Wiki....it shows around 270-320Mhash/s each card depending on clock.
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