3/2017:

SAPPHIRE Radeon R7 350 DirectX 12 100385L 2GB 128-Bit GDDR5 PCI Express 3.0  - newegg (bought for $50)

Plan to replace Radeon HD 5450 on my 32bit Win7 desktop

Spec of Radeon HD 5450

  HD 5450 R7 350
Max Resolution 2560 x 1600 4096 x 2160
Max Resolution Details DVI: 2560 x 1600 / VGA: 2048 x 1536  
MEMORY /
Size 1 GB 2 GB
Effective Clock Speed 1.066 Hz  
Bus Width 64-bit 128-Bit
     
     
     
     
     
     
     
     
   spec link AMD spec link

Side note:
Running a 4k screen using a Radeon HD 5450

During my research I found some suggestions that even a Radeon HD 5450 could output the required resolution (3840×2160), albeit at only 30Hz. I figured if I was only going to get 30Hz (without spending more than I wanted and/or sacrificing to noise), I might as well explore this option. There was this comment on a VisionTek card, for example. There was also this thread at Hard Forum. There were other places too, but every time I checked the official stats on manufacturer’s websites they said otherwise. Even AMD’s own spec sheet says otherwise.

I already had this Sapphire HD 5450 card already, running my 30″ screen, but I couldn’t pick anything higher than 1920×1080 when I plugged my new screen into the HDMI port. I wondered if I could force a higher resolution somehow. Neither the Windows tools or Catalyst Control Center would let me pick it or create a custom resolution.

That led me to an application called Custom Resolution Utility (CRU), which fills in the hole left by all the default software. As it turns out, the resolution I wanted already appeared in the list it exposed. The notes in that forum post suggested I would need to patch my driver to allow a faster pixel clock. This allows for higher resolutions and refresh rates.

The notes included a link to something called the AMD/ATI Pixel Clock Patcher. It was simple enough to run and, immediately after patching it and restarting the driver (using the tool supplied with CRU) I was able to pick 3840×2160 (at 30Hz) from the resolution option in windows.

I’m limited to 30Hz because it’s connected via an HDMI port, but it’s perfectly liveable. The other bonus is I can still run my 30″ at full resolution too. All without spending any more money.
I installed new Radeon HD 5450 card on my new desktop on 7/4/2013.  And installed :
                          Display Driver ver. 12.104
                          OpenCL(tm) Driver ver. 10.0.1124.2
                          Catalyst Control Center ver. 2013.0328.2217.38225

from http://support.amd.com/us/gpudownload/windows/Pages/radeonaiw_vista32.aspx#1
OK.  Just break the lock on the PCIe slot of the mobo.  And also break the HDMI_SPDIF connector on the old desktop.

No connector is attached to the new Radeon HD 5450 card but everything works.

The new Radeon HD 5450 card:  PowerColor Go! Green AX5450 1GBK3-SH Radeon HD 5450 (Cedar) 1GB 64-bit DDR3 PCI Express 2.1 x16 HDCP Ready Low Profile Ready Video Card
Subject: Video card / HDMI audio / USB + 1394 bracket
Date: 6/20/2013 5:36 PM
 

Video card:  Radeon HD 5450

   AMD Catalyst™ Display Driver :

http://support.amd.com/us/gpudownload/windows/Pages/radeonaiw_win8-32.aspx (new: updated on 5/29/2013)

http://support.amd.com/us/gpudownload/windows/Pages/radeonaiw_vista32.aspx#1 (old)

 

And for HDMI audio:

 

 

And read:  http://www.siung.net/bird/tmp2/PC/curr2012PC/DIY_steps.htm 

 

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Old Video card

 

  SAPPHIRE 100119L Radeon X550 256MB 128-bit DDR PCI Express x16 Video Card - Retail

 

  "G:\Data\download\newPC\SAPPHIRE 100119L Radeon X550\ATI Catalyst Software Suite7-3_xp_dd_ccc_wdm_enu_43737.exe"

 

@ http://www.siung.net/bird/tmp2/PC/curr2012PC/DIY_steps.htm

 

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Radeon X550 download:

 

AMD Catalyst™ Display Driver v10.2 

 

http://support.amd.com/us/gpudownload/windows/Legacy/Pages/radeonaiw_vista32.aspx?type=2.4.1&product=2.4.1.3.13&lang=English

 

Note: AMD’s DirectX 9 ATI Radeon graphics accelerators are not officially supported under Windows 7.   If the user chooses to, they can install the ATI Catalyst Windows Vista graphics driver under Windows 7.   Please be aware that none of the new Windows 7 graphics driver (WDDM 1.1) features are supported (as the Windows Vista level graphics driver is limited to WDDM 1.0 level support).  Using the ATI Catalyst Windows Vista driver under Windows 7 is not officially supported by AMD, and as such AMD will not provide any form of customer support for users running in this configuration

 

Full dl:  http://www2.ati.com/drivers/10-2_legacy_vista32-64_dd_ccc.exe (incl. Catalyst Control Center)

 

Driver only:  http://www2.ati.com/drivers/10-2_legacy_vista32-64_wdm.exe  (already on my Win7?)

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Installed     USB + 1394 bracket if possible – try connect the blue to a USB 2.0 header

 

 

On my ASRock 970 EXTREME3,  I have   3 x USB 2.0 headers (support 6 USB 2.0 ports):