Fury X voltage and HBM overclocking unlocked.

[Prysin]

so software limited, not limited on Rad/NV's side.

also hardware limited.

 

because consumer grade GPUs are required to ATLEAST have 4x PCIe Gen2 or 3 lanes for quadfire.... no board, even X99 boards, have enough PCIe lanes or PCIe connectors to power a 5th one without burning out the PCIe power delivery on the mobo...

 

You cannot run normal cards like these in more then quad mode. Because every single consumer grade card is a dual slot or wider. Whilst server grade stuff is often single slot and is rated to operate with fewer PCIe lanes (X1 and X2)

[TheRandomness]

How do you figure? Maxwell is larger than Fury X at 601mm^2 vs 596

What I said might be true. Comes from a reliable™ source c: (May or may not be true but it at least tries to explain the high clocks and such)

[MageTank]

hey mate i has newsflash for you !!

 

4 1TB HDDS, 32GB 1.5v 1866Mhz DDR3 RAM (about 10w per stick with full load on them), FX 8320 @ 4.52GHz 1.4625V and a R9 295x2 running 7% OC to the core, 1400 on Memory and +50% power limit -> never exceeded 792w even with valley AND prime95 running memory and CPU stressing...

Also, i want to add that running prime95 and valley is kinda foolish. Prime is obviously going to steal all of the cycles so valley wont be stressing hard. Heaven would be a hotter bench. That, or if you have the stones, you can run Furmark at the same time.

[Stardar1]

also hardware limited.

 

because consumer grade GPUs are required to ATLEAST have 4x PCIe Gen2 or 3 lanes for quadfire.... no board, even X99 boards, have enough PCIe lanes or PCIe connectors to power a 5th one without burning out the PCIe power delivery on the mobo...

 

You cannot run normal cards like these in more then quad mode. Because every single consumer grade card is a dual slot or wider. Whilst server grade stuff is often single slot and is rated to operate with fewer PCIe lanes (X1 and X2)

ASUS has a board with 6 PCIe x16 slots, i would think it is the lanes in the CPU that limit it

[Sharkyx1]

What I said might be true. Comes from a reliable™ source c: (May or may not be true but it at least tries to explain the high clocks and such)

How could it be cut down? its larger than Fury X. Unless you mean part of it is deactivated in which case it would be even more embarrassing for AMD

[Prysin]

None of this information is helpful without knowing the answer to the following questions. 

 

1. What power supply were you using?

 

2. Was this the wattage reported from the wall?

 

Efficiency has an effect on how much power is drawn from the wall, and you must factor that in for power consumption. If you have a wall meter saying you are pulling 1000w from the wall on an 80% bronze PSU, you have to consider that up to 20% of that can be wasted in conversion, so in reality, the system itself is only using 800w of power. 

was using my good old Corsair AX1500i

measured it once using my FLUKE multimeter. Wire by wire. It coincided with the wattage reported in Corsair Link, give or take 5% on the 230volt side. Yes, i live in EU. We have 400/230v TN/IT net as standard here so we get slightly better conversion rates on our PSUs by "default"....

[Prysin]

ASUS has a board with 6 PCIe x16 slots, i would think it is the lanes in the CPU that limit it

yeah, but remember that you can also have auxiliary PCIe lane controllers on the chipset itself.

 

AMDs AM3+ boards run chipset based PCIe Gen2 controllers. This is why some boards, like the Sabertooth R2.0 has the capacity to run CF with dual PCIe 16x mode in addition to a 4x mode and a PCI card.

[Prysin]

Also, i want to add that running prime95 and valley is kinda foolish. Prime is obviously going to steal all of the cycles so valley wont be stressing hard. Heaven would be a hotter bench. That, or if you have the stones, you can run Furmark at the same time.

ive tried running heaven too with that combo, didnt increase my load above 792watts

[MageTank]

ive tried running heaven too with that combo, didnt increase my load above 792watts

Could Linpack + Furmark it. OCCT. If your PSU survives, you win! 

 

Dont do that, lol.

[Daegun]

How could it be cut down? its larger than Fury X. Unless you mean part of it is deactivated in which case it would be even more embarrassing for AMD

He isn't talking die size, he's talking functionality. They cut stuff out so they weren't taking up those precious transistors. Making Maxwell, for gaming and single precision stuff, run faster and cooler.

[Prysin]

Could Linpack + Furmark it. OCCT. If your PSU survives, you win! 

 

Dont do that, lol.

im fairly sure my AX1500i will handle it...  80+ Titanium FTW!

[Sharkyx1]

He isn't talking die size, he's talking functionality. They cut stuff out so they weren't taking up those precious transistors. Making Maxwell, for gaming and single precision stuff, run faster and cooler.

Yeah i get that now, but if it was really like a 480 situation where there was even more cores to be unlocked wouldn't you expect a tesla or other workstation board with them on sale at a lower clock? I don't think there has ever been an Nvidia GPU where they didn't release a full core on the WS side

[Prysin]

He isn't talking die size, he's talking functionality. They cut stuff out so they weren't taking up those precious transistors. Making Maxwell, for gaming and single precision stuff, run faster and cooler.

uhm.... what are you smoking again?

[DildorTheDecent]

not having space for a 120mm radiator

You have to be taking the piss.

[MageTank]

im fairly sure my AX1500i will handle it...  80+ Titanium FTW!

Popped my dad's terrible rosewill PSU doing OCCT back in the day. Had to give him my PSU as a result. Now i only test my own hardware, lol.

[Curufinwe_wins]

@Prysin @App4that @stardar there is the thread I was talking about. Had to dig it up...

http://linustechtips.com/main/topic/449619-new-build-questions-for-crossfire-r9-390x/

Corrections to my apparently bad memory:

1. Furmark, which has known abnormal spiking with Hawaii gpus.

2. Original psu was a 850g2

3. Peak was ~900W.

Actually even there I underestimated the power spiking, but I don't like telling people off of a good product for a rather small issue (well bigish issue but effects almost no one.)

[ThinkWithPortals]

You have to be taking the piss.

Some of us unfortunate folk with small places and ITX systems can't afford the space, not with your fancy full towers and custom loops

[Prysin]

Popped my dad's terrible rosewill PSU doing OCCT back in the day. Had to give him my PSU as a result. Now i only test my own hardware, lol.

well, there is only two consumer grade PSUs comparable to mine..

 

its the Superflower 1600w and EVGA SUPERNOVA T2 1600w....

[Prysin]

@Prysin @App4that @stardar there is the thread I was talking about. Had to dig it up...

http://linustechtips.com/main/topic/449619-new-build-questions-for-crossfire-r9-390x/

Corrections to my apparently bad memory:

1. Furmark, which has known abnormal spiking with Hawaii gpus.

2. Original psu was a 850g2

3. Peak was ~900W.

Actually even there I underestimated the power spiking, but I don't like telling people off of a good product for a rather small issue (well bigish issue but effects almost no one.)

furmark is a shitty game... ive tried it and the graphics was terrible. didnt bother to get to level 2

[MageTank]

You have to be taking the piss.

I sincerely do not have room for a 120mm rad. In fact, my CPU cooler cannot exceed 53mm or it will touch the side panel. The price one must pay when wading in the waters of sub-4L ITX cases. 

[Prysin]

Some of us unfortunate folk with small places and ITX systems can't afford the space, not with your fancy full towers and custom loops

i have a ITX system... it can support 1x 120mm and 1x 240mm

 

you point is?

[Curufinwe_wins]

furmark is a shitty game... ive tried it and the graphics was terrible. didnt bother to get to level 2

Lol....

[MageTank]

i have a ITX system... it can support 1x 120mm and 1x 240mm

 

you point is?

Your ITX system isn't ITX enough.

[ThinkWithPortals]

i have a ITX system... it can support 1x 120mm and 1x 240mm

 

you point is?

My point is that not all of us have space for an extra radiator in their build. Your's might, but some others don't.

[Samfisher]

it is? i thought so.

 

so why go 980ti over the 295x2 then? they roughly equal in price

Crossfire support, heat, power draw, VRAM.  AMD drivers (kek).