Looks like Scrypt mining is fixed in Maxwell

[njdevilsfan87]

Nice. Now both AMD and Nvidia cards will be forever sold out or marked up 70%.

 

[nwo]

265 should be considerable faster than 7850 in mining due to big increase in memory clocks - which make the most difference. Just like 270x is hashing 10-20% faster than 7870.
How on earth 260x could do only 200kh/s is beyond me. My 7770 did more . Maybe increase intensity?

Not necessarily true. Each card is different.

For instance, on my 1GB 7850, memory clocks make a very small difference in hashrate (I've only taken it up to 1300). But on my 7850 2GB, memory clocks make almost no difference above 1250 (1200MHz standard clock speed). And the difference between 1200 and 1250 is only a few kH/s. However, OCing the GPU core yields a very linear hashrate increase, regardless of memory clock.

This is certainly not the case with my 7970 which yields a linear performance increase by OCing the VRAM as high as possible without having stability issues. Followed by finding the sweet spot for the GPU:VRAM clock speed ratio (usually around 0.69:1 for most 7970s).

 

[ams23]

while a 750Ti supposedly achieves it while overclocked.

Umm, and how in the world would you know that? You have not seen nor heard any extensive analysis of Litecoin mining on 750 Ti.

 

[Slomo4shO]

GTX 750 Ti will have 20% higher hash rate than 260X (see chart I linked above), all while consuming WAY less power (the 260X only consumes a little bit less power than 265). At a price point near $110-120 USD, GTX 750 (non-Ti) is arguably a better choice for LiteCoin mining than 260X.

You have no idea what you are talking about :whiste:

 

[x3sphere]

Seems to be a way better buy than any of the AMD cards for mining right now.

They do 300 KH/s overclocked apparently, so three of them is already better than buying a 280x at $400+. Obviously the disadvantage is less density though.

Cudaminer hasn't been optimized for CUDA 6.0 yet either, so another potential performance boost will come.

 

[SlowSpyder]

Does anyone actually mine on these lower end cards? Even at a good performance/watt ratio these are still 'slow' cards for mining.

I haven't mined in a while, been too busy trying to break my FX with crazy overclocks. But I thought mining was dominated by big GPU's yet.

 

[nwo]

The value for hash rate that Tom's listed is irrelevant (there are obviously ways to achieve higher rates for all the cards they tested). The important thing is that 750 Ti is equal in hash rate vs R7 265, 750 Ti is 20% ahead in hash rate vs R7 260X, all while consuming WAY less power than either of them.

A 750Ti is not equal to the hash rate of a 7850. We have already discussed that 7850s can easily achieve 400+kH/s while a 750Ti is only capable of ~300 with an OC which obviously increases it's power consumption.

Radeon 265s have not been released yet, so until miners get their hands on them, we will not know their true mining performance. The only thing we do know is their detailed specifications and their gaming performance. As well as that they are a renamed 7850, just like 270s are renamed 7870s. However, 270s have proven to have significantly higher scrypt mining hashrate performance than their 7870 predecessors.

 

[Red Hawk]

I linked TOM's bench, you are linking AT TOTAL power bench, but they don't seem to contradict each other. I don't understand...

You expect GTX 480 to pull less as time passes by?
BTW thats Furmark. In most gaming scenarios 290X wins Fermi crown easily these days. While NOT being the fastest GPU to boot

The ordinary 290X has either lower power consumption or has just a tad more than the Titan in those benchmarks, and certainly not the 50W deficit that other benchmark showed.

Of course I don't expect it to pull less. It does however somewhat disprove the idea that graphics cards just keep getting louder and hotter as time goes by -- Nvidia's not even quite where it was 4 years ago.

 

[nwo]

Umm, and how in the world would you know that? You have not seen nor heard any extensive analysis of Litecoin mining on 750 Ti.

Have you read the OP?

 

[Slomo4shO]

Radeon 265s have not been released yet, so until miners get their hands on them, we will not know their true mining performance.

Just look up the HD 7850...

 

[ams23]

You have no idea what you are talking about :whiste:

Right, as if GM107's superiority in perf. per watt hasn't been demonstrated by reviewers yet

 

[nwo]

Does anyone actually mine on these lower end cards? Even at a good performance/watt ratio these are still 'slow' cards for mining.

I haven't mined in a while, been too busy trying to break my FX with crazy overclocks. But I thought mining was dominated by big GPU's yet.

I have 2x7870s and 2x7850s. Very happy with their performance/$/watt.

Seems to be a way better buy than any of the AMD cards for mining right now.

They do 300 KH/s overclocked apparently, so three of them is already better than buying a 280x at $400+. Obviously the disadvantage is less density though.

Cudaminer hasn't been optimized for CUDA 6.0 yet either, so another potential performance boost will come.

How would three 750Ti's @ $149 be a better buy than a 280X at $400? You're wasting 2 more PCI-e slots and getting nearly the same overall hashrate. You might be saving ~100W though which is pretty negligible and is negated by the marginal cost of RAM/CPU/mobo to run each card.

 

[nwo]

Just look up the HD 7850...

I don't need to look it up, I have two of them.

That doesn't mean anything though.

I have two 7870s and I have had one 270 (non-X). Even though they are exactly the same according to their specs, the 270 was capable of pulling 470+kH/s while my 7870s are only capable of ~400. Also, changing clock speeds on 7870s and 270s affects their mining hashrate performance in a completely different way.

Therefore, until these 265s hit retail, we will not know what hashrate numbers they are capable of.

 

[njdevilsfan87]

However, 270s have proven to have significantly higher scrypt mining hashrate performance than their 7870 predecessors.

This is not because of the GPU itself though. It has something to do with the memory bandwidth or timings been far better suited for scrypt mining on the 270s than the 7800s. I have 4x 7870s that max out at 405 kH/s at clocks of 945/1450, where as my 4x 270x cards max out at 475 kH/s, at clocks of 1120/1500. Due to the memory on the 7870s, I cannot really tap into the true potential of the GPU core, like the 270x cards can.

I expect to see the same thing with the 265X cards. Those will probably due 430-450 kH/s versus the 380-400 kH/s of the 7850 cards.

 

[Slomo4shO]

Right, as if GM107's superiority in perf. per watt hasn't been demonstrated by reviewers yet

I wasn't aware that this discussion was about gaming performance per watt...

Let me know when you want to discuss khash/watt

 

[x3sphere]

I have 2x7870s and 2x7850s. Very happy with their performance/$/watt.


How would three 750Ti's @ $149 be a better buy than a 280X at $400? You're wasting 2 more PCI-e slots and getting nearly the same overall hashrate. You might be saving ~100W though which is pretty negligible and is negated by the marginal cost of RAM/CPU/mobo to run each card.

Well, yes, that's why I said the disadvantage is density. If you aren't looking to expand your mining operation past a certain point they make sense, though.

Looks like 280x prices have gotten even higher than the last time I checked :S All $450+ on Newegg... that's ridiculous.

 

[Slomo4shO]

I don't need to look it up, I have two of them.

That doesn't mean anything though.

I have two 7870s and I have had one 270 (non-X). Even though they are exactly the same according to their specs, the 270 was capable of pulling 470+kH/s while my 7870s are only capable of ~400. Also, changing clock speeds on 7870s and 270s affects their mining hashrate performance in a completely different way.

Therefore, until these 265s hit retail, we will not know what hashrate numbers they are capable of.

That is because script mining is memory dependent and the "new" cards have higher frequency and tighter timing ram... Nevertheless, referencing older cards does provide a nice baseline for the performance of the rebrands

 

[JDG1980]

Lmfao, that is the worst and most inaccurate benchmark I have seen Tom's Hardware release to date...

A 270/270X getting ~300kH/s... that nearly made me fall out of my chair laghing my *** off!!!

The most likely explanation is that they ran cgminer without any parameters except the server and login info. By default, cgminer runs at 'desktop' intensity. Most dedicated miners use an intensity of 18 or 19, which gives a much higher hash rate.

My 7870 gives about 240 KH/sec when I'm running at intensity 12 (which allows normal desktop usage and 2D gaming). When the system is unattended, I switch to intensity 18, which increases the hashrate to roughly 360 KH/sec.

 

[lagokc]

The PowerColor 7850's (new, retail box) have been available regularly for $119.99 at Newegg over the last 2 months. They may not be peoples' first choice in brand, but they absolutely fit the bill.

http://www.newegg.com/Product/Produc...ds&isdeptsrh=1

$155 after rebate is the only 7850 I see in stock. Where are you finding a 7850 for $119.99? Jumping on one of the shellshockers that sells out in 3 minutes?

 

[nwo]

This is not because of the GPU itself though. It has something to do with the memory bandwidth or timings been far better suited for scrypt mining on the 270s than the 7800s. I have 4x 7870s that max out at 405 kH/s at clocks of 945/1450, where as my 4x 270x cards max out at 475 kH/s, at clocks of 1120/1500. Due to the memory on the 7870s, I cannot really tap into the true potential of the GPU core, like the 270x cards can.

I expect to see the same thing with the 265X cards. Those will probably due 430-450 kH/s versus the 380-400 kH/s of the 7850 cards.

Yep, that's what I'm saying. The GPUs are exactly the same. Pitcarin with exact same number of shaders. Just like 265 and 7850.

It must have something to do with the memory or the VBIOS.

I think 430-450 is a realistic number for the 265s, as long as they don't go below 400 I think they will be a good buy. Like I said, both my 7850s are capable of 420+ and I have both the 1GB XFX and 2GB Powercolor versions.

 

[nwo]

http://www.newegg.com/Product/Produc...ds&isdeptsrh=1

$155 after rebate is the only 7850 I see in stock. Where are you finding a 7850 for $119.99? Jumping on one of the shellshockers that sells out in 3 minutes?

I got one about 10 days ago for $120 after $30 MIR. It was on newegg, and it was not a shellshocker deal. It was in stock for about 2 days.

That is because script mining is memory dependent and the "new" cards have higher frequency and tighter timing ram... Nevertheless, referencing older cards does provide a nice baseline for the performance of the rebrands

True, I'm leaning towards tighter timings/VBIOS since memory clock speed is usually not a factor by itself unless you also account for the difference in timings.

 

[njdevilsfan87]

I think 430-450 is a realistic number for the 265s, as long as they don't go below 400 I think they will be a good buy. Like I said, both my 7850s are capable of 420+ and I have both the 1GB XFX and 2GB Powercolor versions.

How high are the 7850s clocked? I've found with 7850s it's just brute forcing the core as high as it can go for the best hash rates. But I run mine 1100-1150mhz. I did run two PowerColors briefly at 1200mhz and was getting ~413 kH/s per card.

I'm actually thinking about seeing if I can sell my 7870 mining rig on CL for some inflated price that would make a switch over to 265 or 270 cards almost nothing. But that's going to be tough with 270x cards now hitting $300 on NE. But it might be possible after Nvidia introduces more of their Maxwell cards. All the tweaking I had to go through to get it working optimized has to be worth something!

 

[nwo]

How high are the 7850s clocked? I've found with 7850s it's just brute forcing the core as high as it can go for the best hash rates. But I run mine 1100-1150mhz. I did run two PowerColors briefly at 1200mhz and was getting ~413 kH/s per card.

I'm actually thinking about seeing if I can sell my 7870 mining rig on CL for some inflated price that would make a switch over to 265 or 270 cards almost nothing. But that's going to be tough with 270x cards now hitting $300 on NE. But it might be possible after Nvidia introduces more of their Maxwell cards. All the tweaking I had to go through to get it working optimized has to be worth something!

Yep, exactly right, especially for the 2GB versions of the 7850s.

I have my Powercolor 7850 2GB clocked at 1200/1250 for 24/7 usage at stock voltage (1.219) and 0 powertune. Which yields 410 @ 16 intensity which is what I usually run it at since it gives me minimum input lag. At 18 intensity, I get about 420 while using the card for my primary display. I've taken it as high as 1250 core which gives me 430kH/s but it gets close to 90*C and starts throttling since it is inside a PC case and a (nonreference) 7950 is mining below it. I might take it over to my open air mining rig one day just to see how high this baby can go!

My XFX 7850 1GB core runs at 1200/1300 @ I18 and gets ~420 @ 1.138v (not sure if this is stock voltage, assuming it is since it will not let me go any lower, only higher). If I leave the VRAM untouched at 1200, I get about 30kH/s less. I have not really tested it's clock speed limits though, the card has unlocked voltage but its stock voltage is lower than the 2GB Powercolor which has its voltage locked.

I'd sell/trade my 7870s for 265s (if they can get close to 450) or 270s in a hearbeat. I'm very disappointed in their lack of hashrate potential. I get the best mining performance ~400kH/s at 975/1250 clocks @I18... That's right, they are underclocked. Which is certainly not fun! OCing and tinkering is the fun part. But, considering I got them for ~$110-120 each after MIR, I'm pretty happy with my purchase.

 

[3DVagabond]

http://cryptomining-*********/tag/gtx-750-ti-scrypt-mining/

https://docs.google.com/spreadsheet/lv?key=0AlhSF602y9DSdHRneWVZcjJLWmhjaVBMTHVCR3l4eHc&toomany=true

750ti: 265kh/s at 60w (300kh/s with overclocking)
7750: 180kh/s at 55w

Once the big-core Maxwells arrive they should be hashing monsters. If anyone is wondering what is going to cause a price drop for the R9 290s some competition from nVidia is finally arriving.

Competition! That's the only way to right the market. Now, we have to hope that between the two companies they can supply the miners with enough cards that we don't end up with shortages with both brands. I'm worried that this is not possible unless TSMC steps up and allows flexibility in their allocations. This thing could dry up over night and AMD /nVidia would be hurt badly in that situation.

 

[nwo]

Well, by the time nvidia releases their full Maxwell line and Cudaminer is optimized to be able to keep up with AMD cards, we will have scrypt ASICs... So yes, the supply/demand for GPUs will more than likely balance itself out in the next couple of quarters, or at the latest - by the end of the year.