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Forum: GPU Computing 2014-05-09, 20:30
Replies: 1,657
Views: 156,889
Posted By tapion64
I guess I need to look into setting up MISFIT....

I guess I need to look into setting up MISFIT. The second core of the card is getting ~600, so I think just the cost of running graphics for my new monitor lowers the first one by about 50. Not that...
Forum: GPU Computing 2014-05-09, 12:33
Replies: 1,657
Views: 156,889
Posted By tapion64
Ah, that was it. I didn't realize it would treat...

Ah, that was it. I didn't realize it would treat them as cross-fired devices instead of a single card. Making it separate instances works fine. Is there a way to have it draw work from one...
Forum: GPU Computing 2014-05-09, 07:05
Replies: 1,657
Views: 156,889
Posted By tapion64
Testing the latest version with R9 295X2. I tried...

Testing the latest version with R9 295X2. I tried varying a bunch of different settings, and the best I get is around 575 GHz-days/day. Not sure if I need to look at tweaking some AMD settings or if...
Forum: GPU Computing 2014-04-21, 19:50
Replies: 33
Views: 4,578
Posted By tapion64
All of them are 'coming soon' except Sapphire,...

All of them are 'coming soon' except Sapphire, which keeps getting taken on and off the search list. I'm waiting for XFX for the lifetime warranty.
Forum: GPU Computing 2014-04-21, 18:30
Replies: 33
Views: 4,578
Posted By tapion64
The suspense is killing me. You can't find this...

The suspense is killing me. You can't find this card for sale and yet articles have been coming out all day saying it's on sale. Technically, Newegg has Sapphire cards for sale since around noon, and...
Forum: GPU Computing 2014-04-21, 16:40
Replies: 33
Views: 4,578
Posted By tapion64
My understanding is that with the built in liquid...

My understanding is that with the built in liquid cooling on 295x2, coupled with the fan, it's not really necessary to have a custom cooling setup. The non-reference versions might do this...
Forum: PrimeNet 2014-04-21, 03:03
Replies: 14
Views: 1,135
Posted By tapion64
Memory's clocked at 1 GHz, voltage is 1 V. Temp...

Memory's clocked at 1 GHz, voltage is 1 V. Temp stays around 72 C. I've never tried messing with the settings, everything's at stock. Does higher voltage lead to less error but higher temps?
Forum: PrimeNet 2014-04-20, 18:55
Replies: 14
Views: 1,135
Posted By tapion64
Well, my card has always passed the self tests....

Well, my card has always passed the self tests. It's not overclocked and it's non-reference with two fans on it, plus the temperature control in my case is pretty decent over all. I'll wait for...
Forum: GPU Computing 2014-04-18, 22:02
Replies: 12
Views: 752
Posted By tapion64
I can give you some input because I was doing...

I can give you some input because I was doing research for where to get the R9 295x2 from. Short answer is Sapphire for AMD, Gigabyte for Nvidia, but I'll go through each thing in the list.

MSI...
Forum: GPU Computing 2014-04-18, 17:38
Replies: 3,422
Views: 298,232
Posted By tapion64
@LaurV, isn't the bit depth for TF remembered on...

@LaurV, isn't the bit depth for TF remembered on GIMPS? If you look at exponent status and select show full details, it says whether or not it's prime, whether or not a factor has been found, the...
Forum: PrimeNet 2014-04-18, 17:31
Replies: 1
Views: 297
Posted By tapion64
Prime95 for Mac Timer Issue

Not sure if this is just a timer issue or it's actually taking longer, need to verify, but once Prime95 on Mac loses focus for an extended period of time, iteration times increase by a substantial...
Forum: Miscellaneous Math 2014-04-18, 16:49
Replies: 21
Views: 983
Posted By tapion64
Every prime occurs atleast once as a...

Every prime occurs atleast once as a multiplicative order of 2 (I've proven this in another thread), and when they do it's as an order of a prime = 1 or 7 mod 8. All this conjecture hits on is the...
Forum: GPU Computing 2014-04-18, 14:55
Replies: 33
Views: 4,578
Posted By tapion64
A quick question. I don't think this plays that...

A quick question. I don't think this plays that big of a part until I want to crossfire cards, but I'm having trouble finding a concrete answer. It seems like for computing applications that don't...
Forum: Miscellaneous Math 2014-04-18, 12:09
Replies: 21
Views: 983
Posted By tapion64
I'm aware of all of those things, @LaurV and...

I'm aware of all of those things, @LaurV and scienceman. Note that primes = 2p+1 where p is also prime are Mersenne factors = 7 mod 8, if p are Sophie Germain primes = 3 mod 4. This 1:1...
Forum: Miscellaneous Math 2014-04-18, 03:30
Replies: 21
Views: 983
Posted By tapion64
I like your paraphrasing of my quote better than...

I like your paraphrasing of my quote better than my own quote >.>
Forum: Miscellaneous Math 2014-04-18, 03:07
Replies: 21
Views: 983
Posted By tapion64
Mawn, something meaningful like the approximation...

Mawn, something meaningful like the approximation for the number of Mersenne factors less than n, like what I just posted? :p

I'm trying to see how that could link to the distribution of Mersenne...
Forum: Miscellaneous Math 2014-04-18, 02:23
Replies: 21
Views: 983
Posted By tapion64
And now I think I can say. As the primes are...

And now I think I can say. As the primes are evenly distributed across p = 1,3,5,7 mod 8, the normal n/ln(n) divided by 4 is a good approximation for a particular class (e.g. p = 7 mod 8). The ratio...
Forum: Miscellaneous Math 2014-04-18, 02:05
Replies: 21
Views: 983
Posted By tapion64
Yeah, I suppose I should've put the mathematical...

Yeah, I suppose I should've put the mathematical significance in the first post. I was writing it, but then I had to go do something so I left it to edit in later.
Forum: Miscellaneous Math 2014-04-18, 01:48
Replies: 21
Views: 983
Posted By tapion64
The path that leads to conjectures is filled with...

The path that leads to conjectures is filled with many possibly useless figures. You can't give meaning to the figures until you find patterns, and you can't give meaning to the patterns until you...
Forum: Miscellaneous Math 2014-04-18, 01:42
Replies: 21
Views: 983
Posted By tapion64
The mods here just love to move stuff to this sub...

The mods here just love to move stuff to this sub forum. Even though it's relevant to GIMPS. Whatever.

On to the possible mathematical significance. The Sophie Germain primes are distributed...
Forum: Miscellaneous Math 2014-04-18, 00:40
Replies: 21
Views: 983
Posted By tapion64
Distribution of Mersenne Factors

I've been looking for patterns and such dealing with Mersenne factors, and I found something interesting. I have all the primes less than 1 million along with their multiplicative orders mod 2 in a...
Forum: Miscellaneous Math 2014-04-15, 17:10
Replies: 40
Views: 2,266
Posted By tapion64
The problem with that approach is that the...

The problem with that approach is that the division is a much more time consuming operation than multiplications mod n. I figure that's obvious. Anyways, I've always said it's O(n), we can just make...
Forum: Miscellaneous Math 2014-04-15, 14:14
Replies: 74
Views: 3,392
Posted By tapion64
Ah, yeah, I see my mistake now. I was looking at...

Ah, yeah, I see my mistake now. I was looking at an incorrect copy-pasted thing when I did that. It would prove the conjecture false if n was a factor of M-1, not M. My bad.
Forum: Miscellaneous Math 2014-04-15, 13:17
Replies: 74
Views: 3,392
Posted By tapion64
Boldi, take a look again. Take...

Boldi, take a look again.

Take n=193949641=3863*50207. n|2↑1931-1, and 1931 is prime. 3↑n=3 mod n, so it's a base 3 pseudoprime

The exponent here is 1931, which is prime. Yet 2^1931-1 is...
Forum: Miscellaneous Math 2014-04-15, 12:46
Replies: 40
Views: 2,266
Posted By tapion64
No, like I said, it's definitely O(n). It can...

No, like I said, it's definitely O(n). It can just be run in parallel and use some techniques to get it to times that are more like log(n)^2. Number of operations for naive is multiplying two numbers...
Showing results 1 to 25 of 85

 
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