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HP 8300 Complete Overhaul: PSU and GPU upgrades

trs96

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trs96

Moderator
Joined
Jul 31, 2012
Messages
18,932
Motherboard
GA-Z97X-UD3H-BK
CPU
i5-4690K
Graphics
HD4600 / RX 570
Mac
  1. MacBook Pro
  2. Mac mini
Mobile Phone
  1. Android
Joined
Jun 18, 2018
Messages
15
Motherboard
Q77
CPU
i7-3770
Graphics
RX-480 8GB
I've bought the GTX 1650 OC 4G. No 6 pin extra power required and better than 1050 TI.

My apologies for not seeing this right away, it's been a crazy month so far.
I was using a 1050ti with the factory PSU that comes with the 8300. The CMT models don't require low profile cards in most scenarios, the XFX housing on my RX-480 was just a little big and almost caused issues, but I made it work.

If you find that you need more juice later on down the road, you could go with a 500w PSU (cheaper than 650w) and an RX-480 8gb or 1060ti 6gb with no issues, unless you're wanting to boot into macOS, which doesn't support Nvidia in Mojave. Some higher quality games like Overwatch sometimes max-out the GPU/PSU, so use a monitoring system like HWmonitor to check your GPU and PSU utilization.

Best of luck!
 
Joined
Jul 12, 2019
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Motherboard
Q77
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If you find that you need more juice later on down the road, you could go with a 500w PSU (cheaper than 650w) and an RX-480 8gb or 1060ti 6gb with no issues

Thanks for your advices. At this time I have a lot of games that I can play with the GTX 1650 OC 4G.
 
Joined
Sep 15, 2017
Messages
5
Motherboard
HP8300SFF
CPU
i7-3770
Graphics
GTX1050Ti
Thanks for your advices. At this time I have a lot of games that I can play with the GTX 1650 OC 4G.

Don't forget Mojave and all subsequent releases are not compatible with latest nVidia cards. I have moved away from 1050ti to RX580, but the PSU was an issue
 
Joined
Jun 9, 2020
Messages
1
Motherboard
Hewlett Packard 3396
CPU
Intel® Core™ i7-3770 with Intel HD Graphics 4000 (3.40 GHz, 8 MB cache, 4 cores)
Graphics
Nvidia GTX 1050 ti
UPDATE: Check below for updates on this configuration

Hey all! So a while back, I ditched my Mac Mini and decided to try my hand at Hackintoshing.
I went for an HP-8300 with the i7-3770 that I found on eBay for $75.

I used a GTX 1050 Ti, 16GB of RAM, and a pair of Samsung 850 Pro SSD's; one with macOS High Sierra (soon to be Mojave) and one with Windows 10.

I had been using the computer in that configuration for many months now, and it had served me very well. It works great in macOS, especially in FCPX, and even better in Windows, where I like to play some light games (CoD4, Minecraft, GTA San Andreas, etc.). But lately, I've had my eye on an Oculus Rift, and, if I were to try and run it, my system needed some beefing up. I haven't heard of anyone using the Oculus Rift with my configuration before, and I think the i7-3770 might give me a bit of a bottleneck, but only the future knows.

Now the main problem is the proprietary 300-something watt PSU that comes with these systems, and more specifically, the annoying 6-pin connector that supplies power to the motherboard. The PSU also provides no extra PCIe power connectors for the heavier graphics cards and such.

However, I found an adapter on eBay/Amazon that (link) takes the 24-pin ATX harness and adds in a 6-pin connector for the tricky motherboard! The only problem with this solution is that you will need to re-pin the end of the connector (pic below). Also, you will get a boot error for "No power supply fan detected", but you just press f1 and the system will work just fine.

I found a video on Youtube by a user (o0FUZ0o) who had the same issue as me. His pinout worked the best for me! To re-pin the connector, just use a small flathead screwdriver and insert it into the little slots on the broad side of the connector, pushing down GENTLY. Then, gently slide the pins out from the bottom. You'll see a little barb on the pin. Be sure to bend it outwards again before re-inserting.


View attachment 397636



What's important to note is that your adapter may have the wires on the 6-pin connector in a different configuration, and they might be different colors as well. but if you look at the big 24-pin connector, you'll see that 3 of the 4 wires that branch off to the 6-pin connector are all in line, with the last wire being diagonally across from the others. When you are re-pinning, pay no attention to the colors of the wires, nor to the configuration of the wires on the 6-pin connector, as these will likely be different with every batch sold. as long as you follow this pin out, you should be OK.

I bought this adapter, re-pinned the connector, and slapped in my brand new EVGA 650W PSU. After checking to make sure it powered on normally, I was able to drill a hole or two in the sheet metal of the rear I/O panel to mount the PSU as the mounting holes are in a different spot than the factory one.

Now, if I was going to attempt to try VR gaming for this computer, I was going to need a GPU that could keep up.

My choice was the AMD RX 480 8GB. I chose this card because of Apple's refusal to release Nvidia drivers for Mojave, and because its a ridiculously powerful upgrade over my GTX 1050 Ti. This card works natively within macOS, so you don't need any drivers. However, you will need to install drivers for Windows 10 of course.

After I ordered it, I had concerns that the XFX version of the card would be too long to fit in the PC case, even though I have CMT (convertible mini tower). It's over 11" long, which is almost twice as long as my GTX 1050 Ti was. But, after receiving it and testing, it fits tightly, but securely.

View attachment 397639

View attachment 397640

View attachment 397641

(Yeah, I know my case is dusty...blah, blah...)

I just got the card in the mail a few hours ago, so I haven't done any extensive testing. However, running Cinebench on MacOS brought the GPU die temperature up to almost 80*c (according to HW monitor), and when playing a simulation style game, the temps started really creeping up. Might have to invest in a better case fan.

Like I said, I have more testing to do, but, wow! So far, this upgrade has been well worth it!
I'm buying the Oculus Rift tomorrow. So I'll keep you guys up to date with how well the system works in full VR.


Hope this helps someone out there!
Wish me luck!





UPDATE #1:
As I type this, I have been using the computer without any issues for over 48 hours. I found that the card was overheating immensely (over 90*C) after a very short period of use (less than 2 mins). I removed the card, and decided to replace the Thermal Paste, which I later found was the culprit.


The factory paste was very dry and cracked, as well as thin and uneven. I used alcohol and a paper towel to remove the old stuff, then applied some Arctic Silver 5 thermal paste. After re-assembling the card, I popped it back in and booted into windows to play some games. To my immense relief, the card never came above 70*C, and performed flawlessly. so if you find your card starts heating up significantly, it might be worth it to crack the card open and replace the thermal paste.



Since first doing the PSU upgrade, I have also picked up an Oculus Rift CV1 to try with my setup. I was nervous when I first got everything going, but I've played over 10 hours so far, and let me tell you, this setup is golden for VR. The CPU never goes above 65*C and the GPU peaks at 80*C, which is a little warm, but definitely stable.

If anyone is considering doing this setup for VR, I highly recommend it!
Best of luck.

Hi Loaf!

I was wondering if you ever took pictures of your power supply mounting you did for the HP Elite 8300 CMT? I purchased the same computer and bought a Thermalake PSU and it was too small for the cabinet and the holes didn't line up. It also left a fair amount of space around the psu which would be bad for dust. How did you solve these issues - any help would be greatly appreciated! Thanks!
 
Joined
Aug 13, 2020
Messages
1
Motherboard
Compaq 8300 CMT
CPU
i5-3470
Graphics
RX 470
Big thanks to Loaf and everyone else on this thread who helped me figure out how to save my HP 8300! I wanted to upgrade my tower by installing an SSD and a graphics card, the former being the easier of the two. When it comes to GPUs, used cards with no need for additional six-pin or eight-pin power are going for a little more than they are worth because everybody and their dog is using them to beef up older machines. More powerful cards, especially Radeon GPUs, can actually cost a bit less sometimes. I decided that an RX 470 would match my needs perfectly, the only problem was that it requires an additional six-pin connector that the 8300 CMT doesn't have. I tried replacing the power supply with another one that I had laying around and found that, like many others on this thread, that a standard ATX power supply wouldn't fit snugly into the provided slot of the 8300 CMT.

I browsed eBay for a bit to see if I could find a power supply that could provide additional wattage and had the six-pin connector that I would need to power the card. Finally, I came across the power supply for the HP Z400. Most importantly, it fits the rather unique dimensions of these HP towers and the screw holes line up perfectly! It also provides an unexpected 475 watts which allows for more wiggle room when it comes to future upgrades and further expansion. There seemed to be quite a few of them on eBay, so it shouldn't be too hard to find one if you decide you need to buy one.

Unfortunately, I still had to use the adapter Loaf showed earlier in this thread to make the machine work. I do have to deal with the F1 warning on boot (515 - no power supply fan detected), which is a bit of a bummer, but I'm planning on fixing that with a jumper in the future. The power supply only ran me about 25 dollars and the adapter was about 10. All-in-all, 35 bucks and a little bit of time re-pinning the adapter to help revive this old machine seems well worth it to me!

Thanks again to everyone for helping me figure out this mess. I'm not even building a hackintosh, but this is the only place I could find the answers I was looking for. If you have found a better or more user-friendly power supply solution, I'm sure plenty of people (including me!) would love to hear about it. Here's some pics of the new power supply in my machine:

IMG_7222.jpg
IMG_7221.jpg


A bit of a rat's nest I know, but it's my rat's nest :)
 
Joined
May 5, 2017
Messages
378
Motherboard
HP 8300 CMT
CPU
i7-3770
Graphics
RX 560
Mac
  1. MacBook Pro
Very interesting - thank you for your contribution - I will keep an eye out for one :)
 
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