microcontroller — Since my power supply doesn’t provide an 8 pin cable to connect it to my GPU, then what should I connect to my GPU?
I replaced this graphic card:
With this Asus Dual GeForce RTX™ 3060:
And this GPU needs 8 pins but my power supply has these. Since my power supply does not provide 8 pin, to connect it to my GPU, then what should I connect to my GPU?
Molex and SATA power connectors:
Overview of inside PC:
- microcontroller
- power-supply
- cpu
- pci-express
- gpu
6
Your main problem, even if your existing power supply can theoretically send enough power, is that 6-pin cables are limited to 75W, whereas 8-pin can send 150W. The PCI rail can also send 75W.
The 7th & 8th pins provide an additional ground & a sensor to let the system know it is dealing with 8 pins, not 6. The extra pins themselves do not provide this extra power.
So, whatever your card, it can pull a theoretical maximum of only 150W, rather than the 225 it may need.
Chances are, if it needed less than 150, it would only have a 6-pin — but you really need to check the card’s spec.
The image of the PSU’s spec plate would be further evidence that the PSU itself is nowhere near powerful enough to handle a 225W card. The 12v rail is only 180W [this is between all devices].
You need a new PSU that can handle the new GPU’s power requirements.
Your current PSU can provide up to about 250W of power, and only 180W of that power can be delivered through the 12V rail (or rails).
This graphics card will need between 150W and 225W of power from the 12V rail. The upper limit is the sum of power provided by the PCI-e slot (75W) and through the 8-pin connector (150W). The lower limit is deduced: if 150W would be sufficient, the card would use a 6-pin connector.
In the most optimistic scenario, you have only 30W of headroom on the 12V rail, which is the most important rail in a modern PC. That’s definitely not enough.
In the realistic scenario, this PSU will either:
- Cut the power under high load, or
- Operate out of its designed power capabilities with terrible efficiency, or
- Will get damaged, possibly taking more parts with it.
In the pessimistic scenario, this PSU has two or more 12V rails which can provide 180W in total, but up to 90W (or less) each.
EDIT: Yes l, u need new PSU.
For those with enough PSU Wattage:
I’ve got same 3060, it has 170W TDP.
In my case, I’ve got Dell Precision 7520, trying to connect it as eGPU thru m.2 -> PCI-E x16 riser.
Connecting it to 400W PSU, Which has 24pin, 4 pin, 6 pin, some SATA and Molexes.
PCI-E can provide 75W. 8 PIN can provide 150W. This card has RED LED near 8pin if you «put there/not put there any» wrong cable.
There ARE reductions to 8 pin on market. Found (IMHO as old Dells power source replacement):
https://www.amazon.com/COMeap-Adapter-Compatible-Optiplex-Precision/dp/B06XGWRTHC
Then this one from 2 molexes!
https://www.czc.cz/akasa-redukce-napajeni-2x4pin-molex-power-5-25-na-1xpciexp/35837/produkt
Plus my case specific:
I have two risers, I am not able to make work this one:
https://m.aliexpress.com/item/1005004833386620.html I see GPU just sometimes in Dell Diagnostics tool.
So I ordered m.2 to USB and will connect this riser, which I bought accidentally:
https://www.amazon.com/gp/aw/d/B07VPJL68Z
And will try using 24+4 pin to 8 pin first riser as reduction.
And 2molex to 8 pin reduction.
Will let you know about the results + power benchmarks.
3
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6 Pin To 8 Pin PCIE
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6 Pin to 8 Pin PCIE — 6 Pin Female PCIE to 8 Pin Male PCIE PC Graphics Card Power Cable quantity
SKU: 6pin_Female_to_8pin_Male_PC_Gr Category: AC/DC, Data Cables & Adapters
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6 Pin to 8 Pin PCIE – 6 Pin Female PCIE to 8 Pin Male PCIE PC Graphics Card Power Cable for new graphics card to older power supplies
This 6-pin Female to 8-pin Male PC Graphics Card Power Cable adapter is used to connect between new graphics cards using 8 pins to older power supplies supporting 6 pins only. Please make sure your power supply can provide the requires amps on the 6pin output needed by your graphics card on the 8pin input as below examples.
Power conversion cables NOT recommended for GPU Mining due to cards requiring power above nominal power draw and no power supplied via direct PCIE x16 Slot due to risers used and cables will overheat and melt in the long term.
Physical Damage on incorrect cable usage on a graphics card needing too many watts above the cable maximum watts will not be replaced under warranty.
This Cable will provide up to 75Watts via the 6pin connector to 8pin and will draw up to 75 Watt from the PCI Express x16 Slot. THIS IS NOT THE CASE WHEN USING A PCIe Riser and Cable will only provide 75 Watts via the 6pin connector and another maximum of 30 watts via the riser sata or molex connector on a PCIe riser before it will run too hot.
- GPU Maximum Power to be used when on PCIe x16 Slot : 75Watts from Cable Max Power + 75Watts from PCIe x16 Slot = 150 Watts Max Power usage
- GPU Maximum Power to be used on cable when on PCI Riser : 105 Watts Max Power Usage
Common Graphics Cards Nominal Wattages (Excluding Overclocking wattages, if overclocked cards will use more power) – DO NOT USE THE CARD WITH THE CABLE IF IT EXCEEDS WATTS ABOVE on the specific setup.
- Nvidia GTX1050 – Nominal Wattage 75W – Cable safe to use when on PCIe x16 Slot providing additional 75W to card
- Nvidia GTX1060 – Nominal Wattage 120W – Cable safe to use when on PCIe x16 Slot providing additional 75W to card
- Nvidia GTX1070 – Nominal Wattage 150W – Cable safe to use when on PCIe x16 Slot providing additional 75W to card, Some cards may use more than 150W WHICH IS THE MAXIMUM OF CABLE + PCIe Slot so please check your card before usage
- Nvidia GTX1080/TI – Nominal Wattage 225W, 300W when gaming – GPU power exceeds cable max power + PCIe x16 Slot Power, do not use with this card
- AMD RX460 – Some cards have 6pin connectors Nominal Wattage 75W – Cable safe to use when on PCIex16 Slot providing additional 75W to card
- AMD RX470 – Nominal Wattage 120W – Cable safe to use when on PCIe x16 Slot providing additional 75W to card
- AMD RX570 – Nominal Wattage 150W – Cable safe to use when on PCIe x16 Slot providing additional 75W to card, Some cards may use more than 150W WHICH IS THE MAXIMUM OF CABLE + PCIe Slot so please check your card before usage
- AMD RX480/580 – Nominal Wattage 185W – GPU power exceeds cable max power + PCIe x16 Slot Power, do not use with this card
- AMD Vega 56/64 Nominal Wattage 295W – GPU power exceeds cable max power + PCIe x16 Slot Power, do not use with this card
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Radeon RX 480 Flashing Turns 4GB into 8GB / Sudo Null IT News which runs a GPU with the Polaris architecture. The performance of the device is 5.5 TFLOPS, which is not bad for a card with a price of $199 (for the minimum configuration). In addition, support for virtual reality technologies has been added here — now this is an important area that many manufacturers are guided by. The Polaris 10 GPU is made using 14nm FinFET technology. It contains 2034 stream processors, and a 256-bit bus is used to communicate with memory. The adapter is equipped with a six-pin power connector and four video outputs.
The characteristics of the card, as we can see, are not bad, but, as it turned out, they can be improved. Overclockers were able to increase the frequency of the GPU, and thanks to a clever trick, the amount of video memory can be increased from 4 GB to 8 GB.
GPU Overclocking
Immediately after the release of the card on the market, enthusiasts became interested in its overclocking potential. Overclockers were able to increase the operating frequency of the graphics processor of the AMD Radeon RX 480 video card to 1425 MHz. The nominal frequency of the GPU card is 1120/1266 MHz in standard/boost modes. When checking the overclocked card in 3DMark Firestrike, the result was 14646 points. That’s higher than cards like the Radeon R9390X and Radeon R9 Nano that have been factory overclocked.
After completing these experiments, enthusiasts decided to test the operation of the card with a liquid cooling system. In this case, an additional fan was used to cool the memory chips and the power system. In addition, I had to install an additional external power controller. Using the controller, the voltage on the GPU was increased to 1.35 V. The overclocking result is impressive: the frequency of the video chip was increased to 1500 MHz, and the memory chips to 9000 MHz.
The result in 3DMark Firestrike increased to 15363 points. True, the batteries heated up to 105 degrees Celsius, and the card began to consume 260 watts.
Due to the fact that the card uses a 6 + 1 phase power system, it is able to provide 58% more current when compared to the NVIDIA GeForce GTX 1080 Founder’s Edition (it uses a 5 + 1 phase power system). If the manufacturer equipped it with 8-pin power connectors, we could talk about even more overclocking potential of the device. AMD announced that improved card models — Sapphire RX 480 Nitro, Sapphire RX 480 Gaming, Powercolor RX 480 Devil and ASUS RX 480 Strix Gaming will receive an 8-pin auxiliary power connector. And ASUS RX 480 Strix Gaming will receive a second connector — either 8- or 6-pin. Such cards should go on sale this month.
Issues were reported in June with the Radeon RX 480 exceeding its power specifications. The 150-watt adapter consumed 168 watts at full load. Installed in a PCI-E slot, this adapter consumed 90 watts.
This is more than the standard 75W slot. After the problem became known, the company fixed it by releasing a software update — Radeon Software 16.7.1.
Increasing the memory capacity
The manufacturer releases two versions of the AMD Radeon RX 480 card: with 4 and 8 GB of video memory. As it turned out, the younger AMD Radeon RX 480 4G model actually has 8 GB of video memory. Upon direct inspection of the 4 GB version, it turned out that the board contains 8 memory chips from Samsung with a total capacity of 8 GB.
But half of the memory is disabled by the manufacturer, the «extra» memory is locked at the BIOS level. Reducing the amount of memory in a device this way is not the most rational solution, but in the first AMD Radeon RX 480 cards that hit the market, the shutdown was done that way.
As it turned out, the block can be removed. To do this, you need the ATIFlash 2.74 program. With its help, representatives of the TechPowerUp website took a BIOS image of a card with 8 GB of memory.
The image is available at this link. After that, the resulting image was transferred to the younger model. Immediately after that, the younger model showed an increase in video memory up to 8 GB. The operation of the modified map was tested while playing Call of Duty: Black Ops III. The toy consumes more than 4 GB of VRAM in 4K Ultra HD (3840 x 2160) mode. A test run of the game was also made on the 8 GB version of the card. Both cards showed almost the same result. The original 8 GB card achieved 24.6 fps, the modified 4 GB card achieved 24.7 fps, and the original 4 GB card achieved 23.3 fps.
The price difference between the 4 GB and 8 GB versions of the AMD Radeon RX 480 is $30.
Before flashing a junior card, make sure that there are 8 Samsung memory chips on the board. It may well happen that the manufacturer will physically reduce the amount of video memory, and then when you try to reflash the lower version of the card with the image of the BIOS of the older model, you will get a “brick”.
In a similar way in 2011, they learned how to convert ATI Radeon HD 6950 in the HD 6970. The BIOS of the younger model was flashed by the craftsmen to the BIOS of the older model, getting the full functionality of the HD 6970 and saving about $100 (at that time). The journalists of the already mentioned site TechPowerUp were the first to report the possibility of such firmware.
Speaking about the video memory of graphic adapters, it is worth remembering the problem with NVIDIA cards. Namely, with the GTX 970 model. The manufacturer in the specifications for the card indicated the amount of video memory of 4 GB. This is true, but an eighth of this volume did not work normally. When accessing the last 500-700MB of GTX 9 memory70 performance drops significantly. The drop is very noticeable — from 150 GB / s to 19.88 GB / s.
The card memory has been divided into two segments. This is the main fast memory segment of 3.5 GB and the remainder of 0.5 GB. The issue with the last 500 MB has mostly been experienced by owners of 4K monitors or multi-display systems.
Virtual Reality
The system requirements for VR headsets such as the HTC Vive and Oculus Rift list a powerful graphics card in the $300 price range. AMD is offering its card for $199. Thus, the floor of the cost of VR systems is gradually decreasing.
A set of libraries and SDK called LiquidVR has been released specifically for VR mode (DirectX 12 and Vulkan API supported).
In addition, Variable Rate Shading (VRS) has been added to save pixel fillrate resources in a VR environment. This feature allows the driver to reduce the load on the GPU by filling in the pixels of excess areas that compensate for the distortion of proportions by the helmet lenses.
The NVIDIA GTX 1080 and 1070 also support VR, but they are in the upper and mid-range segments. For example, the cost of NVIDIA GTX 1070 is $380. And the price of the flagship model NVIDIA GTX 1080 is $600.
Software
Now the company promises to release new versions of drivers for its products more often than in previous years.
In 2015, for example, there were only three WHQL-certified versions of Radeon Software, plus nine spin-off versions that optimized specific games.
AMD plans to launch six major WHQL-certified driver updates and gamer-required intermediate versions that will be optimized for specific games.
Competitors
NVIDIA has released a competitor to the AMD Radeon RX 480, the NVIDIA GeForce GTX 1060 graphics card, priced at $249. The GP106 GPU contains 1280 CUDA cores. The number of texture units here is 80. The bus is 192-bit, GDDR5 memory is 6 GB. The GPU operates at a base frequency of 1056 MHz, the maximum frequency is 1708 MHz. The effective memory frequency is 8000 MHz. GPU performance — 4.4 TFLOPS.
The card consumes about 120 W, the developer provided one six-pin auxiliary power connector. There are five video outputs on the mounting plate of the card. DVI, HDMI, plus three DisplayPorts.
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