Topic: My mining rig of 3 XFX RX 480 with Dell T7500... (Read 1604 times)

The reason GPUz reports such a lower number than a Kill-A-Watt meter is because GPUz reports the power of the GPU itself, without memory, VRMs, other components on the board.  

I see this complaint/comment a lot and want to get that out there...

i know this is a late response but... I've been fighting this thing for 2 weeks and figured i'd post what worked for me. just started playing around with mining. I have a dell t5400 and t7500. I purchased a rx 460 and ran into the same issue with error code 43 tried with existing win10 pro x64, updating to latest bios, ran into error so i performed a clean install... same issue. Installed win7 pro 32 & 64... same issue. Installed ubuntu 15.10... wouldn't detect properly . Tested in every full pcie slot i have. Installed card in main rig (i7 6700k, z170, etc...) worked perfectly. Figured these workstation boards were made for quadro cards since the card was confirmed good so i returned the card. Went a week looking at pc parts for a new build just for eth mining because i really wanted to run the new rx cards due to performance and eff in mining, not to mention price. Ran across this forum and figured id take the risk again. Purchased a rx 470 this time... popped it in and same issue. I then installed an old gt 520 in pci-e slot 1 and the rx 480 in slot 2. BAM... card detected, drivers installed properly and working well. decided I test and pulled the old gt 520 out and see what happens. Booted the t7500 and everything is golden. Only issue is you cant configure bios with the amd card. work around is to have an old spare nvidia card around if you need to make changes in the bios. This also applies to the t5400.

I wanted to post my experience to hopefully help anyone who runs into this issue like i did.

You are welcome mate, i have been in the same situation like you with some HD7950 ref boards and when its was coming to hash , it was like riding a jetski  Arctic saved me !

GPU-Z Value is always a lower than the real one. Use that only as an indicator.. Sometimes the error is around 50%, so if u need some real measurement use your power meter.
p.s. Flash your cards, you will get more hash rate with less power


Thank you ! The reference was just a try and i will avoid them next time
I didn't know those products, so thanks for sharing!

Well I've managed to get rid of the high temperature, by placing the cards with a gap, now the three placings which I've on the board are in the following order:

-One RX 480 at x1 PCI-E slot with the help of USB riser.
-One RX 480 at x16 PCI-E 2.0 (75 W) slot.
-One RX 480 at x8 PCI-E slot.

All the three are producing 24.5 Mh/s without any bottleneck. According to the GPU-Z, each of the card is taking 100 W, a total of 300 W, but according to the Watt meter, I've an overall reading of 600 W. That's way higher than the GPU-Z, any ideas guys? Is is due to the heavy Dell T7500?

I've to pay $0.16 per kWh, so that's not so good.

meh ! thats why you always must avoid ref cards! You only savior is https://www.arctic.ac/eu_en/products/cooling/vga.html
check Accelero Twin Turbo II

I am using the 480LowEnergyRom developed by eliovp and i get 29Mhash for 100W. (If u cannot find that let me know in PM)

I'm using XFX reference cards and i have problems with temperature too. Even though ambient is around 23, GPU are at 85 degrees. I need 100% fan power to keep them at 70 and i don't like that noise 

Any good ROM for low power/low temperature? I'm having trouble with mining for 15+ minutes, probably because of overheating/more power consumption, the system auto-restarts. The temperature at which the GPU's are mining is 80-85.

Any suggestions/ideas?

Well I've already upgraded and now planning to run the miner.

BTW guys, is the ~85 temperature normal in mining? Is it safe to flash using ATIFlash? Which is the best low-temperature & low-power consuming ROM around here? I want to keep the temperature and power within the limits, no matter if the hash rate is low. I'm trying to find a very cool and safe ROM.

as per my experience dont upgrade to windows 10. windows 7 is the best os to mine but that kept in mind the difference has to be tested out on dell t7500..but anyways 7 will edge out  10 .

Well I'm currently upgrading the Windows 7 to 10. So I can't check the driver as of now, and I'll be installing a new driver anyways, so you can tell me that which one I should install.

As far as I remember, I tried a bit of modifications in the Wattman, but it didn't change the ratio of power and hash rate at all.

One more thing, I was getting the temperature like ~85, isn't it normal? 

try your amd settings  go to wattman  and set all 3 gpus on -15 for power  see what that does for your power and your hash.

it is simple and it is safe to do.


you want your gpus under 70c  if you can do that.

wattman has a fan and temp setting you can also do.

what amd driver are you using? 
16.7.2 ?
16.7.3 ?

Guys, I've built a mining rig of 3 XFX RX 480 (480p8dba6) and getting 75 Mh/s in Ether (along with a few Decred) mining with Claymore on Windows 7 64-bit. The total power which each GPU is consuming is about 110 Watts (meaning 25 Mh/s with 110 Watts for each GPU). The CPU is Dell T7500 with it's own 1000 Watts power supply.

I've not modified any thing in bios and haven't done any overclocking at all. Didn't try anything changed. I've the latest driver installed.

So, I wanted to ask, what should I change and with which software to get better hashrate at lesser power consumption? Or should I just stick to the default settings with the current hashrate? One thing I should definitely tell you, I CANNOT AFFORD TO DAMAGE MY GPU's, keep that in mind while advising me something.

One more thing, what maximum temperature of the GPU is usual after 1-2 hours of mining?