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Sapphire Tech
Sapphire Tech PULSE Radeon RX 6400 4GB GDDR6 graphics card
Entry graphics card with 4 GB GDDR6 on a 64-bit bus, 768 stream processors and a 2321 MHz boost clock, single-fan cooler at 154 mm length, PCIe 4.0, HDMI and DisplayPort 1.4
- InterfacePCI Express 4.0
- Chipset ManufacturerAMD
- GPU SeriesAMD Radeon RX 6000 Series
- GPURadeon RX 6400
- Memory Size4GB
- Memory Interface64-Bit
- 4GB GDDR6 memory with 64-bit bus for smooth 1080p gaming
- Boost clock reaches 2321 MHz for responsive frame rates
- 768 stream processors handle modern shader workloads
- PCI Express 4.0 interface doubles bandwidth over previous standard
- Compact 154 mm single-fan design fits small-form-factor builds
Sapphire Pulse Radeon RX 6400 4GB
The Sapphire Pulse Radeon RX 6400 is a compact graphics card built for small-form-factor PCs. It targets users who need basic 1080p display output and light compute without a large power budget. The single-fan cooler keeps the 154 mm board cool inside tight cases. It suits office builds, home-theatre rigs, and entry-level gaming at modest settings.
PCI Express 4.0 x4 interface limit
The card uses a PCI Express 4.0 connection limited to four lanes. On older platforms that only provide PCIe 3.0, the link runs at half the peak bandwidth. This reduction can lower frame rates in titles that stream assets heavily across the bus. Builders should verify their motherboard chipset and CPU lane allocation before purchase.
64-Bit memory bus decides fit
The 64-Bit GDDR6 memory interface is the specification that determines whether this GPU matches a workload. It delivers enough throughput for desktop multimedia and older esports titles at 1080p. Modern games with large texture sets will saturate the narrow bus quickly. Choose this card only when the memory width aligns with the intended resolution and asset quality.
Highlights
- 4GB GDDR6 memory with 64-bit bus for smooth 1080p gaming
- Boost clock reaches 2321 MHz for responsive frame rates
- 768 stream processors handle modern shader workloads
- PCI Express 4.0 interface doubles bandwidth over previous standard
- Compact 154 mm single-fan design fits small-form-factor builds
Specifications
| Brand | SAPPHIRE |
|---|---|
| Series | PULSE |
| Interface | PCI Express 4.0 |
| Chipset Manufacturer | AMD |
| GPU Series | AMD Radeon RX 6000 Series |
| GPU | Radeon RX 6400 |
| Memory Size | 4GB |
| Memory Interface | 64-Bit |
| Memory Type | GDDR6 |
| HDMI | 1 x HDMI |
| DisplayPort | 1 x DisplayPort 1.4 |
| Cooler | Single Fan |
| Max GPU Length | 154 mm |
Questions about this item
Should I choose the 4 GB 64-bit GDDR6 model or a larger frame buffer for 1080p gaming?
The 4 GB 64-bit GDDR6 configuration targets 1080p entry-level gaming; titles with higher texture settings may exceed the frame buffer.
What does the 2321 MHz boost clock deliver in actual gameplay?
The 2321 MHz boost clock is the peak GPU frequency under load; sustained clocks depend on thermals and the single-fan cooler.
How does the PCI Express 4.0 interface affect performance on a PCIe 3.0 motherboard?
The card plugs into PCIe 4.0 slots and operates at PCIe 3.0 speeds on older platforms; the 64-bit memory bus limits total bandwidth in either case.
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