With the original Radeon RX 7900 XTX launch, I had the chance to check out the reference 7900 XTX and was impressed with its performance but our card did run hot. With the 7900 XT I have had the chance to check out aftermarket cards, but for the 7900 XTX, I haven’t. So when I had the chance to check out the PowerColor Hellhound RX 7900 XTX I jumped at the chance. I’m really curious how improved cooling and an overclock will change performance, on top of that 7900 XTXs are now more available and selling for less than the original $999 MSRP the Hellhound can be found for $949 so today I’m going to check out what makes the Hellhound special, put it to the test to see how it compares, and then reevaluate how it fits in the market now that prices have dropped. Let’s dig in!

Product Name: PowerColor Hellhound RX 7900 XTX

Review Sample Provided by: PowerColor

Written by: Wes Compton

Amazon Affiliate Link: HERE



Graphics Engine

RX 7900 XTX 24G-L/OC

Video Memory


Stream Processor

6144 Units

Engine Clock(OC)

up to 2330MHz(Game)

up to 2525MHz(Boost)

Engine Clock(STD/Silent)

up to 2270MHz(Game)

up to 2500MHz(Boost)

Memory Clock

20.0 Gbps

Memory Interface


DirectX® Support


Bus Standard

PCIE 4.0

Standard Display Connectors

1 x HDMI 2.13 x DisplayPort 2.1

(only 2x simultaneous DP2.1 connections can be supported)

Product Remark

'Game Clock' is the expected GPU clock when running typical gaming applications, set to typical TGP (Total Graphics Power). Actual individual game clock results may vary.

'Boost Clock' is the maximum frequency achievable on the GPU running a bursty workload. Boost clock achievability, frequency, and sustainability will vary based on several factors, including but not limited to: thermal conditions and variations in applications and workloads.

Feature Support



AMD Stream Technology


AMD Eyefinity Technology


Maximum Resolution





Power Specs + Board Dimensions

Board Dimensions


338mm*147mm*62mm(with bracket)

Minimum System Power Requirement (W)


Extension Power Connector

Two 8-pin PCI Express Power connectors


Before getting into testing I did also run GPUz to double-check that our clock speeds match up with the specifications. The Hellhound has a boost clock speed of 2525MHz when on the OC mode which is the BIOS profile that the card shipped on. That is a 26 MHz overclock over the 2499 MHz boost clock on the reference card I previously tested. The Hellhound does show up with the correct clock speeds in GPUz and it also documents the BIOS revision and driver used in our testing as well for future reference.

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